Research Philosophy Is A Belief Management Essay

Research Philosophy Is A Belief Management Essay The purpose of this chapter is to discuss the research philosophy, approach, strategy that is relevant to this business research. In addition, data collection method that is conducted to address the research problems as provided in chapter 2 is also included. The research methodology will be based on the research onion as introduced by Saunders et al. (2009) Figure 3.1. Selecting the appropriate methodology is essential for the effectiveness of any research (Buckley, 2006). The right choice of the approach will help to make a more informed decision about the research design and strategy that will be consistent with the research topic (Easterby-Smith et al., 1993). In this section, a questionnaire is to be designed to support data collection and further analysis on the research hypotheses. Besides, ethical issues of this research are also included in the end of this chapter. 3.2 Research philosophy Research philosophy is a belief about the way in which data about a phenomenon should be collected and analyzed (Levin, 1988). It is significant with particular reference to research methodology because: (i) it can help the researcher to refine and specify the research methods to be used in a study, that is, to clarify the overall research strategy to be used, (ii) knowledge of research philosophy will enable and assist the researcher to evaluate different methodologies and methods and avoid inappropriate use and unnecessary work by identifying the limitations of particular approaches at an early stage and (iii) it may help the researcher to be creative and innovative in either selection or adaptation of methods (Easterby-Smith et al., 1993). Figure 3.1 Research onion Source: Saunders et al. (2009) According to Saunders et al. (2009), there are four research philosophies in management research including positivism, realism, interpretivism and pragmatism. The choice of research philosophy will therefore influence the development of the research. And although each research philosophy has its strengths and weaknesses (Neville, 2005), the author chooses philosophy of positivism for this study because of the following reasons. The philosophy of positivism research is considered a source of knowledge closely associated with the physical and natural sciences (Alavi and Carlson, 1992). The special features of positivism are seen to be a philosophical ideology and movement, and it has a certain influence in human perception (Birger, 2005). By positing a reality in separation of subject and object, the positivist paradigm provides an objective reality against which researchers can compare their claims and ascertain truth (Popper, 1972). Positivism is largely concerned with the testing, confirmation and falsification, and predictive ability of generalizable theories about an objective, readily apprehended reality (Chua, 1986; Orlikowski and Baroudi, 1991). The objective of positivism is to provide a valid logical foundation for empirical research, and simultaneously restrict the scope of human rationality in scientific study to discovery the efficient means with its aim to achieve the end goal Friedman (1953). 3.3 Research approach In their 2009 work, Saunders et al. referred to the two broad methods of reasoning as the deductive and inductive approaches. Deductive reasoning works from the more general to the more specific, meaning that it starts with a theory, and then hypotheses are developed and a research strategy is designed to test the hypotheses. Meanwhile, inductive reasoning moves from specific observations to broader generalizations and theories, meaning that theories are developed as a result of data collection (Saunders et al., 2009). In this study, the author chooses deduction research approach due to the following reasons: It involves the development of a theory that is subjected to a rigorous test (Saunders et al., 2009). It is the dominant research approach in the natural sciences, where laws present the basis of explanation, allow the anticipation of phenomena, predict their occurrence and therefore permit them to be controlled (Collis and Hussey, 2003). Deductive reasoning is more narrow in nature and is concerned with testing or confirming hypotheses (Babbie, 2001) and therefore, more suitable with the context of this study. 3.4 Research strategy Saunders et al. (2009) stated that research strategy is important as it will help to answer particular research questions and meet research objectives, and that the choice of research strategy will be guided by the research questions and objectives, the extent of existing knowledge, the limit of time and other resources available. The strategies as indicated in the research onion (Saunders et al., 2009) are: experiment, survey, case study, action research, grounded theory, ethnography and archival research. In this study, the author thinks that case study strategy is most suitable and consistent with the research objectives, for the following reasons: It is a strategy for doing research which involves an empirical investigation of a particular contemporary phenomenon within its real life context using multiple sources of evidence (Robson, 2002). It provides a better understanding and content theorization of the processes and context in which the practices of management control take place (Morris and Wood, 1991; Adams et al., 2006; Berry et al., 2009 cited in Simoes and Rodrigues, 2008). It can be a very worthwhile way of exploring and challenging existing theories and provide a source of new research questions (Saunders et al., 2009). It has considerable ability to generate answers to the questions Why, What and How (Saunders et al., 2009) that are raised in this study. According to Yin (1994), the case study methodology is the most suitable approach to answer the questions Why? and How? In this case, the questions we want to answer are: Why has the BSC been introduced as a performance measurement tool? and How is the BSC model evaluated via employees feedback? How is the relationship between those measures? The advantage of this approach lies in the possibility of achieving triangulation (Denzin, 1978) which is given by the possibility of using many data sources. 3.5 Research Method As indicated in the research onion by Saunders et al. (2009), mono method, multi-method or mixed methods can be used as the system of collecting data for research projects. In multi-method, quantitative and qualitative researches are used widely in business and management research to differentiate both data collection techniques and data analysis procedures (Saunders et al., 2009). Qualitative research method focuses on discovering and understanding the experiences, perspectives, and thoughts of participants-that is, qualitative research explores meaning, purpose, or reality (Hiatt, 1986). It is usually described as allowing a detailed exploration of a topic of interest in which information is collected by a researcher through case studies, ethnographic work, interviews, and so on (Harwell, 2011). Meanwhile, quantitative research method attempts to maximize objectivity, replicability, and generalizibility of findings, and is typically interested in prediction. Its key features are th e use of instruments such as tests or surveys to collect data, and reliance on probability theory to test statistical hypotheses that correspond to research questions of interest (Harwell, 2011). In supporting this studys objectives, the author chooses to use both qualitative and quantitative researches. It is hoped that the combination of these two methods will strongly support the development of this study in terms of data collection and analysis. Specifically, qualitative approach will be applied in this study via closed questions in questionnaires to obtain information with its aim to explain how the factors impacting BSC in current context of HSBC. Besides, data of research allows researchers to access and recognize population attitudes, perceptions, and ideas about particular social questions with a small sample, as well as practical knowledge (Swidorski, 1980). Accordingly, questionnaire surveys play an important role in helping researchers understand the principles of questionnaire design to explain results in an optimal and meaningful way (Slattery et al., 2011). 3.6 Methods of collecting data 3.6.1 Data source Data are facts, figures and other relevant materials, past and present, serving as bases for study and analysis (Dekeba, 2012). Therefore, data collection is an important aspect of any type of research study. Data gathered by different methods may provide different windows onto social world (Gilbert, 2008). On the other hand, inaccurate data collection can impact the results of a study and ultimately lead to invalid results (Afroze, 2010). Basically, data collection includes primary data and secondary data. Primary data is the data which is collected for the first time (Hair et al., 2011). Researchers discussed that the major advantage of primary data is that the information is specific, relevant, up-to-date and that they answer specific research questions that secondary data cannot. However, cost and time consuming are its main disadvantages (Onkvisit Shaw, 2008). Secondary data is the data which is not originally collected but rather obtained from published or unpublished sources (Jha Shah, 2009). Its advantage is that it can be quickly and cheaply obtained, however the most important limitation is that it may not be accurate and updated, therefore not meeting specific research needs (Saunders et al., 2009). In particular, both primary data and secondary data are used in the research with the purpose of providing an objective and multifaceted view on the topic. Secondary data retrieved from e-books, e-journals from the Universitys e-library, websites and HSBCs available internal sources and the banks internal and restricted reports on strategy, structure and procedures as inputs for chapter 1 and 2 and for designing questionnaires. Primary data is to be collected from a survey using questionnaires amongst HSBCs staff within the scope of this research. 3.6.2 Data collection method As mentioned by Saunders et al. (2009), three ways of primary data collection include Observation, Interview and Questionnaires. Observation involves the systematic observation, recording, description, analysis and interpretation of peoples behavior (Hodges Videto, 2011). The main advantage is that it allow researcher to witness behaviors, skills, record and reflect those in their research. However, it is possible that the researcher makes incorrect observations and interpretations (Kerlinger, 1988). Interview is defined by Kahn and Cannel (1965) as a purposeful discussion between two or more people. Interviews help researchers gather valid and reliable data that are relevant to their research questions and objectives but it is a costly method in term of time and money. The interviewer is also needed to be equipped with skills so that they do not interfere or mislead the interviewees with their questions (Saunders et al., 2009). Questionnaire is one of the most widely used data collection techniques widely in business and management research for descriptive or explanatory (Saunders et al., 2009). The term questionnaire is defined as a formalized set of questions with the purpose of obtaining information from respondents (Malhotra et al., 1996). According to Ackroyd and Hughes (1981), questionnaire has some limitations such as: (i) respondents can misinterpret the questions and therefore give incorrect answers, (ii) limited information can be retrieved due to formatted questions, (iii) low chance for the collector to come back and ask for clarification from respondents and (iv) respondents may not be willing to answer if they are not required. However, according to Afroze (2010), there are various factors influencing the choice of a data collection method, including research questions, resources available, scope of work, timeline, and so on. Further to this study, the author decides to choose collecting data using questionnaires rather than observation and interview approaches when considering all these factors and referring to the following advantages (Ackroyd and Hughes, 1981). Large number of responses can be collected from a large number of people in a short period of time and in a relatively cost effective way The results of the questionnaires can be quickly and easily quantified by the researcher or through the use of a software package It can be analyzed more scientifically and objectively than other forms of research When data has been quantified, it can be used to compare and contrast other research and may be used to measure change Positivists believe that quantitative data can be used to create new theories and/or test existing hypotheses Figure 3.2: Types of questionnaire Source: Saunders et al. (2009) As indicated by Saunders et al. (2009), there are two kinds of questionnaires including self-administered and interviewer-administered questionnaires. In this research, self-administered, delivery and collection questionnaire is used, due to the following rationales. à ¢Ã¢â€š ¬Ã‚ ¢ It is more cost effective to administer than face-to-face interviews, convenient to respondents as they can complete it at a time and place that is convenient for them, reducing the possibility of interviewer bias, and is perceived to be less intrusive than telephone or face-to-face surveys and hence, respondents will more readily respond truthfully to sensitive questions (Eiselen et al., 2005). à ¢Ã¢â€š ¬Ã‚ ¢ The responses are gathered in a standardized way, so questionnaires are more objective than interviews, and information can be collected from a large portion of a group (Milne, 1999). It facilitates generalization but on the downside, could lead to false conclusions (Deem et al, 2010). According to OLeary (2004), a well-designed questionnaire should meet the research objectives. It should give accurate and relevant information to the research questions and be clearly organized and presented in a way that ensures respondents fully understand the questions and provide accurate, unbiased and complete information. Accordingly, the author was trying hard on building a questionnaire that works in practice and meets the research objectives as elaborated in Chapter 1. In this research, the questionnaire is divided into six sections of 28 questions as described in Figure 3.3 below. They are designed to collect information regarding employees comments and feedback during the implementation process of BSC in HSBC. Figure 3.3: Allocation of questions and research content Section Description Question Section 1 Balanced Scorecard weighting Q1-4 Section 2 Setting objectives Q5-14 Section 3 Financial Q15-18 Section 4 Customer Q19-21 Section 5 Internal processing Q22-24 Section 6 Learning and growth Q25-28 It is a combination of a 5-point Likert rating scale (Likert, 1932) (1=strongly disagree; 2=disagree; 3=neutral; 4=agree; 5=strongly agree) and open-ended statements Please explainà ¢Ã¢â€š ¬Ã‚ ¦ to collect both quantitative and qualitative information. In other words, questionnaires include both quantitative and qualitative questions with which participants can choose one of the five ratings and explain their choice. This ensures respondents have the option to add their own views and feelings (Fisher, 2007) and, on the other hand, providing more information and facts to the author in doing research. It may take 10-15 minutes to complete a self-administered questionnaire. In general, the research is more about what employee experience is with the BSC than about getting a correct answer (Waal et al., 2009). In addition, it is necessary to have a questionnaire cover letter written in order to shortly explain to the respondents of the questionnaire what the survey is all about and what is the purpose of asking the questions (Kiernan, 2005). Considering the nature of this research, it is also essential to let people know that their participation is voluntary and that their data are anonymous and confidential. In this survey, 28 questions are designed in an attempt to get answers to 7 hypotheses as mentioned in Chapter 2, following are the general descriptions: Q1 is to classify sales and non-sales position of participants at HSBC. Q2 is to classify the seniority of the participants at HSBC. Q3 4 are to explore the proportion of the four perspectives of HSBC BSC. Q5 is about the effectiveness of BSC at HSBC. Q6, 8, 9, 10, 11, 12, 13, 14, 16 19 are to explore positive effects of BSC at HSBC, in which Q6 is about strategy translation, Q8 about strategy link, Q9 about employee understanding, Q10 about tracking record, Q11 about clear communication, Q13 about feedback encouragement, Q14 about employee satisfaction, Q15 about long and short term link, Q16 19 about a clear focus on achieving targets. Q7, 8, 9 11 are more focused on employee understanding Q17, 18, 20, 21, 22, 23, 24 are about potential relationships between four perspectives, in which Q17 18 are about relationships between financial and customer value and learning and growth, Q20 21 about relationship between learning and growth and customer, Q22 23 about relationship between customer and internal processing and Q24 about relationship between learning and internal processing. Q25, 26, 27 28 are more focused on learning and growth to figure out if it is the weakest point in HSBC BSC. All these questions are written in details in the Appendix 1 under a full questionnaire. 3.6.3 Sampling method Sample is a part of a population whose properties are studied to gain information about the whole (Webster, 1985). It is a process of selecting respondents form larger part for the purpose of a study. Sampling owns a lot of advantages. It saves time, costs and efforts, making data collection become more manageable as fewer people are involved, and the results will be available more quickly. And to ensure a sample is representative, it is suggested to obtain as high a response rate as possible. According to Saunders et al. (2009), sampling techniques help to reduce the amount of data needed to collect by considering only data from a sub-group rather than all possible cases or elements. Two types of sampling techniques are probability sampling and non-probability sampling. In probability sampling, sample units are selected randomly, whereas in non-probability sampling, they are selected based on the researchers judgment, convenience, or other non-random process (Blattberg et al., 2008). The choice of which technique is used in this research is made in favor of non-probability sampling. Due to the scope of work and the limitation of time, the survey is conducted amongst Premier Center staff only. Only 40 people are included in the survey, they are at different positions (teller, counter officer, service assistant, service manager, relationship officer, sales manager) and different levels of seniority (senior, junior, new joiner). And in this case, it is not necessary to launch a pilot test as recommended by Peterson (2000). There are two primary reasons. First, they are every day dealing with issues related to BSC systems, from setting objectives at the beginning to rating performance every mid-year or year-end. Their daily work and performance is directly subject to all measures of the BSC. Hence, a lot of opinions and feedback can be collected as a source of data collection. Second, they are all working in Premier Center that is the same workplace with the author, then the nature of working environment and the point of view can be quite identical and easier to approach. Moreover, response rate can be high and they are more willing to support the author in doing questionnaires with frank answers. It is believed by many observers that higher response rate will assure more accurate survey results (Rea and Parker 1997). 3.7 Framework of data analysis Figure 3.4 below provide a summary and connection between research objectives as mentioned in chapter 1 and related literature in chapter 2 and equivalent hypotheses as provided in regards to questions designed in chapter 3 to collect data and information for further analysis. Figure 3.4: Summary of chapter 1, 2 and 3 and relevance Objective O Literature Hypothesis H Question Q O1: To understand BSC as a performance measurement tool Performance Measurement and BSC H1: BSC and its perspectives act as an effective performance measurement tool Q5 O2: To identify positive and negative effects of BSC in HSBC Vietnam Positive and negative effects of BSC (9P3N: 9 positive 3 negative points) H2: There are relatively positive impacts of BSC in HSBC H4: There are relatively negative impacts of BSC in HSBC Q6-8-9-10-11-13-14-16-19 Q12 O3: To measure if HSBC BSC model is different compared to an ideal model What is an ideal model? (Norton, 2000) H6: The execution of BSC in a specific organization in practice is different with an ideal BSC Q3-4 O4: To evaluate the relationship between employee understanding of the organizations objectives with a well-performing organization What is a well performing organization? (Steward, 1999) H3: There is a positive relationship between a well performing organization and its employees understanding of its objectives Q7-8-9-11 O5: To analyze the causal relationships between 4 perspectives of BSC Relationship between four perspectives H7: There is a causal relationship between 4 perspectives of BSC in HSBC Q17-18-20-21-22-23-24 O6: To identify the weakest one of the four perspectives. H5: Of the four perspectives of HSBCs BSC, learning and growth is the weakest point. Q25-26-27-28 Due to the nature of this study and the limited timeframe, the author only uses simple formulas in excel 2007 to consolidate figures and analyze data. Analysis is based on quantitative and qualitative information collected from the survey as well as from the authors individual understanding of the subject. 3.8 Ethical issues Since people are the subject of research, it is very difficult to avoid falling into ethical issues (Monette et al., 2005). Therefore, approval has to be obtained from management to conduct this survey at Premier Centers, and a brief explanation of the purpose of the questionnaire is necessarily included in cover letter in order to have an appropriate approach and outlook from participants. In addition, the research topic is about Balanced Scorecard, which is in fact a relatively sensitive issue in terms of human resource management. It covers all employees and managers at all levels as well as issues concerning employees benefits, corporate governance, empowerment, motivation and retention policy and so on. As such, particular attention must be paid to the approach of gathering information from subjects in banking area which are considered to be sensitive, especially in HSBC where privacy and confidentiality is part of its code of conduct and execution. Being aware that disclosure of the banks information to third parties can put the bank at risk and result in operational and reputation loss, there are several points that need high commitment as follow. First, participation in this survey is entirely voluntary and the rights of respondents as human beings should be respected at all times (Cohen, Manion Morrison 2004). Second, for privacy concerns, no actual names of participants are to be revealed. Information provided by them remains confidential and will be reported in summary format only. Third, the content and results of this study are required to be kept private and confidential between the author and the professor only. As some restricted and highly restricted information has been used in this study, particularly highly sensitive and confidential performance data has been obtained, public access and reference are not allowed for any purposes. 3.9 Chapter summary This chapter on methodology enables the author to gain a rich understanding of the context of the research and the processes being enacted, therefore answering the why, what and how questions (Saunders et al., 2006). This section also provides a connection between itself with the research objectives in chapter 1, literature and hypotheses in chapter 2 by presenting research method and data collection via a list of questions to be worked on. Further in the next chapter, results and analysis on collected data will be discussed in details.

Non-duality: Madhyamika, Yogacara, and Zen Essays -- Religion, Buddhis

Buddhism first developed in India by Siddhartha Gautama as a means to end suffering. Nirvana could ultimately be achieved with adherence to the Four Noble Truths and the middle way. The Mahayana tradition arose within Buddhist with different interpretations of Buddha’s teachings and new ideals. It emphasized the role of the bodhisattva and the bodhisattva path as the means to attain enlightenment, or Buddhahood. The nature of the Buddha is no longer equivalent to that of the arhant, rather, he is beyond the level of the arhant; he is a transcended being. Within Mahayana, Madhyamika and Yogacara philosophical schools developed in India and the Zen tradition arose once Buddhism spread to East Asia. While Madhyamika, Yogacara, and Zen emphasize several different concepts in an effort to attain enlightenment, all three adhere to the Mahayana doctrine of emptiness and non-duality. At the core of the Mahayana doctrine of emptiness lays in the early Buddhist belief in anatman, or no self. There is both a spiritual and material part to human nature, but it is the â€Å"moral identity that survives death and is reborn† (Prebish and Keown 56). The concept of anatman eliminates attachment to the material by claiming that an individual has no real core, or soul, and the five skandhas, or aggregates of attachment, namely the material form, feelings, perceptions, mental formations and consciousness, provides evidence. â€Å"It is held that none of the five skandhas are able to exist in the absence of the other four† (Hershock). Desire is one of the main causes of suffering, and the five aggregates are the objects of desire. Dependent origination holds that everything is conditioned and â€Å"lack intrinsic being of their own† (Prebish and Keown 49)... ...anslation can be seen in translating emptiness. If emptiness is translated as upaya, or skillful means, then emptiness is a way of eliminating attachment to all views by criticizing them much like Nagarjuna does. â€Å"Emptiness potentially can liberate or trap one further into greater conceptual illusions† (Low 133). The trap occurs when the view is not is not ultimately true. Enlightenment is central to Buddhism; it is a form of freedom. Madhyamika, Yogacara, and Zen have different ways of interpreting the different stages of enlightenment, but they all hold that the realization of enlightenment means having the wisdom to view reality in its natural form. All sentient beings and dharmas are empty and free from the subject-object dualism. Once the individual understands the impermanence of reality, the individual has attained wisdom and therefore enlightenment. Non-duality: Madhyamika, Yogacara, and Zen Essays -- Religion, Buddhis Buddhism first developed in India by Siddhartha Gautama as a means to end suffering. Nirvana could ultimately be achieved with adherence to the Four Noble Truths and the middle way. The Mahayana tradition arose within Buddhist with different interpretations of Buddha’s teachings and new ideals. It emphasized the role of the bodhisattva and the bodhisattva path as the means to attain enlightenment, or Buddhahood. The nature of the Buddha is no longer equivalent to that of the arhant, rather, he is beyond the level of the arhant; he is a transcended being. Within Mahayana, Madhyamika and Yogacara philosophical schools developed in India and the Zen tradition arose once Buddhism spread to East Asia. While Madhyamika, Yogacara, and Zen emphasize several different concepts in an effort to attain enlightenment, all three adhere to the Mahayana doctrine of emptiness and non-duality. At the core of the Mahayana doctrine of emptiness lays in the early Buddhist belief in anatman, or no self. There is both a spiritual and material part to human nature, but it is the â€Å"moral identity that survives death and is reborn† (Prebish and Keown 56). The concept of anatman eliminates attachment to the material by claiming that an individual has no real core, or soul, and the five skandhas, or aggregates of attachment, namely the material form, feelings, perceptions, mental formations and consciousness, provides evidence. â€Å"It is held that none of the five skandhas are able to exist in the absence of the other four† (Hershock). Desire is one of the main causes of suffering, and the five aggregates are the objects of desire. Dependent origination holds that everything is conditioned and â€Å"lack intrinsic being of their own† (Prebish and Keown 49)... ...anslation can be seen in translating emptiness. If emptiness is translated as upaya, or skillful means, then emptiness is a way of eliminating attachment to all views by criticizing them much like Nagarjuna does. â€Å"Emptiness potentially can liberate or trap one further into greater conceptual illusions† (Low 133). The trap occurs when the view is not is not ultimately true. Enlightenment is central to Buddhism; it is a form of freedom. Madhyamika, Yogacara, and Zen have different ways of interpreting the different stages of enlightenment, but they all hold that the realization of enlightenment means having the wisdom to view reality in its natural form. All sentient beings and dharmas are empty and free from the subject-object dualism. Once the individual understands the impermanence of reality, the individual has attained wisdom and therefore enlightenment.

Evaluating The Waste Water Treatment Processes Environmental Sciences Essay

Domestic effluent intervention or sewerage intervention, is the procedure of taking contaminations from effluent and family sewerage, both overflow ( wastewaters ) and domestic. It includes physical, chemical, and biological procedures to take physical, chemical and biological contaminations. Its aim is to bring forth an environmentally-safe fluid waste watercourse ( or treated wastewater ) and a solid waste ( or treated sludge ) suitable for disposal or reuse ( normally as farm fertiliser ) . Using advanced engineering it is now possible to re-use sewerage wastewater for imbibing H2O, although Singapore is the lone state to implement such engineering on a production graduated table in its production of NEWater. 1.2 ORIGIN OF WASTE WATER Sewage is created by residential, institutional, and commercial and industrial constitutions and includes family waste liquid from lavatories, baths, showers, kitchens, sinks and so forth that is disposed of via cloacas. In many countries, sewerage besides includes liquid waste from industry and commercialism. The separation and draining of family waste into greywater and blackwater is going more common in the developed universe, with greywater being permitted to be used for irrigating workss or recycled for blushing lavatories. Sewage may include stormwater overflow. Sewage systems capable of managing stormwater are known as combined systems. Combined sewer systems are normally avoided now because precipitation causes widely changing flows cut downing sewerage intervention works efficiency. Combined cloacas require much larger, more expensive, intervention installations than healthful cloacas. Heavy storm overflow may overpower the sewerage intervention system, doing a spill or flood. Sanitary cloacas are typically much smaller than combined cloacas, and they are non designed to transport stormwater. Backups of natural sewerage can happen if inordinate Infiltration/Inflow is allowed into a healthful cloaca system. Modern sewered developments be given to be provided with separate storm drain systems for rainwater. As rainfall travels over roofs and the land, it may pick up assorted contaminations including dirt atoms and other deposit, heavy metals, organic compounds, carnal waste, and oil and lubricating oil. ( See urban overflow. ) Some legal powers require stormwater to have some degree of intervention before being discharged straight into waterways. Examples of intervention procedures used for stormwater include keeping basins, wetlands, buried vaults with assorted sorts of media filters, and vortex centrifuges ( to take harsh solids ) . Chapter TWO 2.1 OVERVIEW OF WASTE WATER TREATMENT PROCESSES Sewage can be treated near to where it is created, a decentralized system, ( in infected armored combat vehicles, biofilters or aerophilic intervention systems ) , or be collected and transported via a web of pipes and pump Stationss to a municipal intervention works, a centralized system, ( see sewage and pipes and substructure ) . Sewage aggregation and intervention is typically capable to local, province and federal ordinances and criterions. Industrial beginnings of effluent frequently require specialised intervention processes as shown in the diagram below: Procedure Flow Diagram for a typical intervention works via Subsurface Flow Constructed Wetlands ( SFCW ) Sewage intervention by and large involves three phases, called primary, secondary and third intervention. Primary intervention consists of temporarily keeping the sewerage in a quiescent basin where heavy solids can settle to the underside while oil, lubricating oil and lighter solids float to the surface. The settled and floating stuffs are removed and the staying liquid may be discharged or subjected to secondary intervention. Secondary intervention removes dissolved and suspended biological affair. Secondary intervention is typically performed by autochthonal, water-borne microorganisms in a managed home ground. Secondary intervention may necessitate a separation procedure to take the microorganisms from the treated H2O prior to dispatch or third intervention. Third intervention is sometimes defined as anything more than primary and secondary intervention in order to let rejection into a extremely sensitive or delicate ecosystem ( estuaries, low-flow rivers, coral reefs etc. ) . Treated H2O is sometimes disinfected chemically or physically ( for illustration, by lagunas and microfiltration ) prior to dispatch into a watercourse, river, bay, laguna or wetland, or it can be used for the irrigation of a golf class, green manner or park. If it is sufficiently clean, it can besides be used for groundwater recharge or agricultural intents. 2.2 PRE-TREATMENT Pre-treatment removes stuffs that can be easy collected from the natural waste H2O before they damage or clog the pumps and skimmers of primary intervention clarifiers ( rubbish, tree limbs, foliages, etc. ) . Screening The inflowing sewerage H2O is screened to take all big objects like tins, shreds, sticks, fictile packages etc. carried in the sewerage watercourse. This is most normally done with an automated automatically raked saloon screen in modern workss functioning big populations, whilst in smaller or less modern workss a manually cleaned screen may be used. The raking action of a mechanical saloon screen is typically paced harmonizing to the accretion on the saloon screens and/or flow rate. The solids are collected and subsequently disposed in a landfill or incinerated. Bar screens or mesh screens of changing sizes may be used to optimise solids remotion. If gross solids are non removed they become entrained in pipes and traveling parts of the intervention works and can do significant harm and inefficiency in the procedure. GRIT REMOVAL Pre-treatment may include a sand or grit channel or chamber where the speed of the entrance effluent is adjusted to let the colony of sand, grit, rocks, and broken glass. These atoms are removed because they may damage pumps and other equipment. For little healthful cloaca systems, the grit Chamberss may non be necessary, but grit remotion is desirable at larger workss. FAT AND GREASE REMOVAL In some larger workss, fat and lubricating oil is removed by go throughing the sewerage through a little armored combat vehicle where skimmers collect the fat natation on the surface. Air blowers in the base of the armored combat vehicle may besides be used to assist retrieve the fat as a foam. In most workss nevertheless, fat and lubricating oil remotion takes topographic point in the primary colony armored combat vehicle utilizing mechanical surface skimmers. 2.3 PRIMARY TREATMENT In the primary deposit phase, sewerage flows through big armored combat vehicles, normally called â€Å" primary clarifiers † or â€Å" primary deposit armored combat vehicles. † The armored combat vehicles are used to settle sludge while lubricating oil and oils rise to the surface and are skimmed off. Primary settling armored combat vehicles are normally equipped with automatically goaded scrapers that continually drive the gathered sludge towards a hopper in the base of the armored combat vehicle where it is pumped to sludge intervention installations. Grease and oil from the drifting stuff can sometimes be recovered for saponification. The dimensions of the armored combat vehicle should be designed to consequence remotion of a high per centum of the floatables and sludge. A typical deposit armored combat vehicle may take from 60 to 65 per centum of suspended solids, and from 30 to 35 per centum of biochemical O demand ( BOD ) from the sewerage. 2.4 SECONDARY TREATMENT Secondary intervention is designed to well degrade the biological content of the sewerage which are derived from human waste, nutrient waste, soaps and detergent. The bulk of municipal workss handle the settled sewerage spirits utilizing aerophilic biological procedures. To be effectual, the biology necessitate both O and nutrient to populate. The bacterium and Protozoa consume biodegradable soluble organic contaminations ( e.g. sugars, fats, organic short-chain C molecules, etc. ) and adhere much of the less soluble fractions into floc. Secondary intervention systems are classified as fixed-film or suspended-growth systems. Fixed-film or affiliated growing systems include dribbling filters and revolving biological contactors, where the biomass grows on media and the sewerage passes over its surface. Suspended-growth systems include activated sludge, where the biomass is assorted with the sewerage and can be operated in a smaller infinite than fixed-film systems that treat the same sum of H2O. However, fixed-film systems are more able to get by with drastic alterations in the sum of biological stuff and can supply higher remotion rates for organic stuff and suspended solids than suspended growing systems. [ 6 ] :11-13 Rough ining filters are intended to handle peculiarly strong or variable organic tonss, typically industrial, to let them to so be treated by conventional secondary intervention procedures. Features include filters filled with media to which effluent is applied. They are designed to let high hydraulic burden and a high degree of aeration. On larger installings, air is forced through the media utilizing blowers. The attendant effluent is normally within the normal scope for conventional intervention procedures. A generalised, conventional diagram of an activated sludge procedure. A filter removes a little per centum of the suspended organic affair, while the bulk of the organic affair undergoes a alteration of character, merely due to the biological oxidization and nitrification taking topographic point in the filter. With this aerophilic oxidization and nitrification, the organic solids are converted into coagulated suspended mass, which is heavier and bulkier, and can settle to the underside of a armored combat vehicle. The wastewater of the filter is hence passed through a deposit armored combat vehicle, called a secondary clarifier, secondary subsiding armored combat vehicle or humus armored combat vehicle. ACTIVATED SLUDGE In general, activated sludge workss encompass a assortment of mechanisms and procedures that use dissolved O to advance the growing of biological floc that well removes organic stuff. The procedure traps particulate stuff and can, under ideal conditions, convert ammonium hydroxide to nitrite and nitrate and finally to nitrogen gas. SURFACE-AERATED BASINS ( LAGOONS ) Many little municipal sewerage systems in the United States ( 1 million gal./day or less ) usage aerated lagunas. Most biological oxidization processes for handling industrial effluents have in common the usage of O ( or air ) and microbic action. Surface-aerated basins achieve 80 to 90 per centum remotion of BOD with keeping times of 1 to 10 yearss. The basins may run in deepness from 1.5 to 5.0 meters and utilize motor-driven aerators drifting on the surface of the effluent. In an aerated basin system, the aerators provide two maps: they transfer air into the basins required by the biological oxidization reactions, and they provide the commixture required for scattering the air and for reaching the reactants ( that is, O, effluent and bug ) . Typically, the drifting surface aerators are rated to present the sum of air tantamount to 1.8 to 2.7A kilograms O2/kWA ·h. However, they do non supply as good commixture as is usually achieved in activated sludge systems and hence aerated basins do non accomplish the same public presentation degree as activated sludge units. Biological oxidization procedures are sensitive to temperature and, between 0 A °C and 40 A °C, the rate of biological reactions increase with temperature. Most surface aerated vass operate at between 4 A °C and 32 A °C. CONSTRUCTED WETLANDS Constructed wetlands ( can either be surface flow or subsurface flow, horizontal or perpendicular flow ) , include engineered reedbeds and belong to the household of phytorestoration and ecotechnologies ; they provide a high grade of biological betterment and depending on design, act as a primary, secondary and sometimes third intervention, besides see phytoremediation. One illustration is a little reedbed used to clean the drainage from the elephants ‘ enclosure at Chester Zoo in England ; legion CWs are used to recycle the H2O of the metropolis of Honfleur in France and legion other towns in Europe, the US, Asia and Australia. They are known to be extremely productive systems as they copy natural wetlands, called the â€Å" Kidneys of the Earth † for their cardinal recycling capacity of the hydrological rhythm in the biosphere. Robust and dependable, their intervention capacities improve as clip spell by, at the antonym of conventional intervention workss whose machine ry age with clip. They are being progressively used, although equal and experient design are more cardinal than for other systems and infinite restriction may hinder their usage. FILTER BEDS ( OXIDIZING BEDS ) In older workss and those having variable burdens, dribbling filter beds are used where the settled sewerage spirits is spread onto the surface of a bed made up of coke ( carbonized coal ) , limestone french friess or specially fabricated fictile media. Such media must hold big surface countries to back up the biofilms that form. The spirits is typically distributed through perforated spray weaponries. The distributed spirits drips through the bed and is collected in drains at the base. These drains besides provide a beginning of air which percolates up through the bed, maintaining it aerophilic. Biological movies of bacteriums, Protozoa and fungi signifier on the media ‘s surfaces and eat or otherwise cut down the organic content. This biofilm is frequently grazed by insect larvae, snails, and worms which help keep an optimum thickness. Overloading of beds increases the thickness of the movie taking to clogging of the filter media and ponding on the surface. SOIL BIO-TECHNOLOGY A new procedure called Soil Bio-Technology ( SBT ) developed at IIT Bombay has shown enormous betterments in procedure efficiency enabling entire H2O reuse, due to highly low runing power demands of less than 50 Js per kilogram of treated H2O. Typically SBT systems can accomplish chemical O demand ( COD ) degrees less than 10A mg/L from sewerage input of COD 400A mg/L. SBT workss exhibit high decreases in COD values and bacterial counts as a consequence of the really high microbic densenesss available in the media. Unlike conventional intervention workss, SBT workss produce undistinguished sums of sludge, preventing the demand for sludge disposal countries that are required by other engineerings. BIOLOGICAL AERATED FILTERS Biological Aerated ( or Anoxic ) Filter ( BAF ) or Biofilters combine filtration with biological C decrease, nitrification or denitrification. BAF normally includes a reactor filled with a filter media. The media is either in suspension or supported by a crushed rock bed at the pes of the filter. The double intent of this media is to back up extremely active biomass that is attached to it and to filtrate suspended solids. Carbon decrease and ammonium hydroxide transition occurs in aerophilic manner and sometime achieved in a individual reactor while nitrate transition occurs in anoxic manner. BAF is operated either in upflow or downflow constellation depending on design specified by maker. Conventional diagram of a typical revolving biological contactor ( RBC ) . The treated wastewater clarifier/settler is non included in the diagram. ROTATING BIOLOGICAL CONTACTORS Revolving biological contactors ( RBCs ) are mechanical secondary intervention systems, which are robust and capable of defying rushs in organic burden. RBCs were foremost installed in Germany in 1960 and have since been developed and refined into a dependable operating unit. The revolving discs back up the growing of bacteriums and micro-organisms nowadays in the sewerage, which break down and brace organic pollutants. To be successful, micro-organisms need both O to populate and nutrient to turn. Oxygen is obtained from the ambiance as the discs rotate. As the micro-organisms grow, they build up on the media until they are sloughed off due to shear forces provided by the revolving phonograph record in the sewerage. Effluent from the RBC is so passed through concluding clarifiers where the microorganisms in suspension settee as a sludge. The sludge is withdrawn from the clarifier for farther intervention. A functionally similar biological filtering system has become popular as portion of place fish tank filtration and purification. The fish tank H2O is drawn up out of the armored combat vehicle and so cascaded over a freely whirling corrugated fiber-mesh wheel before go throughing through a media filter and back into the fish tank. The whirling mesh wheel develops a biofilm coating of micro-organisms that feed on the suspended wastes in the fish tank H2O and are besides exposed to the ambiance as the wheel rotates. This is particularly good at taking waste. MEMBRANE BIOREACTORS Membrane bioreactors ( MBR ) combine activated sludge intervention with a membrane liquid-solid separation procedure. The membrane constituent uses low force per unit area microfiltration or extremist filtration membranes and eliminates the demand for elucidation and third filtration. The membranes are typically immersed in the aeration armored combat vehicle ; nevertheless, some applications utilize a separate membrane armored combat vehicle. One of the cardinal benefits of an MBR system is that it efficaciously overcomes the restrictions associated with hapless subsiding of sludge in conventional activated sludge ( CAS ) processes. The engineering permits bioreactor operation with well higher assorted spirits suspended solids ( MLSS ) concentration than CAS systems, which are limited by sludge subsiding. The procedure is typically operated at MLSS in the scope of 8,000-12,000A mg/L, while CAS are operated in the scope of 2,000-3,000A mg/L. The elevated biomass concentration in the MBR procedure allows for really effectual remotion of both soluble and particulate biodegradable stuffs at higher burden rates. Therefore increased sludge keeping times, normally transcending 15 yearss, guarantee complete nitrification even in highly cold conditions. SECONDARY SEDIMENTATION The concluding measure in the secondary intervention phase is to settle out the biological floc or filter stuff through a secondary clarifier and to bring forth sewage H2O incorporating low degrees of organic stuff and suspended affair. TERTIARY TREATMENT The intent of third intervention is to supply a concluding intervention phase to raise the outflowing quality before it is discharged to the receiving environment ( sea, river, lake, land, etc. ) . More than one third intervention procedure may be used at any intervention works. If disinfection is practiced, it is ever the concluding procedure. It is besides called â€Å" outflowing shining. † Filtration Sand filtration removes much of the residuary suspended affair. Filtration over activated C, besides called C surface assimilation, removes residuary toxins. LAGOONING Lagooning provides colony and farther biological betterment through storage in big semisynthetic pools or lagunas. These lagunas are extremely aerophilic and colonisation by native macrophytes, particularly reeds, is frequently encouraged. Small filter feeding invertebrates such as Daphnia and species of Rotifera greatly assist in intervention by taking all right particulates. NUTRIENT REMOVAL Effluent may incorporate high degrees of the foods N and P. Excessive release to the environment can take to a physique up of foods, called eutrophication, which can in bend encourage the giantism of weeds, algae, and blue-green algaes ( bluish green algae ) . This may do an algal bloom, a rapid growing in the population of algae. The algae Numberss are unsustainable and finally most of them die. The decomposition of the algae by bacteriums uses up so much of O in the H2O that most or all of the animate beings die, which creates more organic affair for the bacteriums to break up. In add-on to doing deoxygenation, some algal species produce toxins that contaminate imbibing H2O supplies. Different intervention procedures are required to take N and P. NITROGEN REMOVAL The remotion of N is effected through the biological oxidization of N from ammonium hydroxide to nitrate ( nitrification ) , followed by denitrification, the decrease of nitrate to nitrogen gas. Nitrogen gas is released to the ambiance and therefore removed from the H2O. Nitrification itself is a two-step aerophilic procedure, each measure facilitated by a different type of bacteriums. The oxidization of ammonium hydroxide ( NH3 ) to nitrite ( NO2a?’ ) is most frequently facilitated by Nitrosomonas spp. ( nitroso mentioning to the formation of a nitroso functional group ) . Nitrite oxidization to nitrate ( NO3a?’ ) , though traditionally believed to be facilitated by Nitrobacter spp. ( nitro mentioning the formation of a nitro functional group ) , is now known to be facilitated in the environment about entirely by Nitrospira spp. Denitrification requires anoxic conditions to promote the appropriate biological communities to organize. It is facilitated by a broad diverseness of bacteriums. Sand filters, lagooning and reed beds can all be used to cut down N, but the activated sludge procedure ( if designed good ) can make the occupation the most easy. Since denitrification is the decrease of nitrate to dinitrogen gas, an negatron giver is needed. This can be, depending on the effluent, organic affair ( from fecal matters ) , sulfide, or an added giver like methyl alcohol. PHOSPHORUS REMOVAL Phosphorus remotion is of import as it is a confining food for algae growing in many fresh H2O systems. ( For a description of the negative effects of algae, see Nutrient remotion ) . It is besides peculiarly of import for H2O reuse systems where high P concentrations may take to fouling of downstream equipment such as rearward osmosis. Phosphorus can be removed biologically in a procedure called enhanced biological P remotion. In this procedure, specific bacterium, called polyphosphate roll uping beings ( PAOs ) , are selectively enriched and roll up big measures of P within their cells ( up to 20 per centum of their mass ) . When the biomass enriched in these bacteriums is separated from the treated H2O, these biosolids have a high fertiliser value. Phosphorus remotion can besides be achieved by chemical precipitation, normally with salts of Fe ( e.g. ferrous chloride ) , aluminium ( e.g. alum ) , or lime. This may take to inordinate sludge production as hydrated oxides precipitates and the added chemicals can be expensive. Chemical P remotion requires significantly smaller equipment footmark than biological remotion, is easier to run and is frequently more dependable than biological P removalA . Another method for P remotion is to utilize farinaceous laterite. Once removed, P, in the signifier of a phosphate-rich sludge, may be stored in a land fill or resold for usage in fertiliser. Disinfection The intent of disinfection in the intervention of waste H2O is to well cut down the figure of micro-organisms in the H2O to be discharged back into the environment. The effectivity of disinfection depends on the quality of the H2O being treated ( e.g. , cloud cover, pH, etc. ) , the type of disinfection being used, the bactericidal dose ( concentration and clip ) , and other environmental variables. Cloudy H2O will be treated less successfully, since solid affair can screen organisms, particularly from ultraviolet visible radiation or if contact times are low. By and large, short contact times, low doses and high flows all militate against effectual disinfection. Common methods of disinfection include ozone, Cl, ultraviolet visible radiation, or Na hypochlorite. Chloramine, which is used for imbibing H2O, is non used in waste H2O intervention because of its continuity. Chlorination remains the most common signifier of waste H2O disinfection in North America due to its low cost and long-run history of effectivity. One disadvantage is that chlorination of residuary organic stuff can bring forth chlorinated-organic compounds that may be carcinogenic or harmful to the environment. Residual Cl or chloramines may besides be capable of chlorinating organic stuff in the natural aquatic environment. Further, because residuary Cl is toxic to aquatic species, the treated wastewater must besides be chemically dechlorinated, adding to the complexness and cost of intervention. Ultraviolet ( UV ) light can be used alternatively of Cl, I, or other chemicals. Because no chemicals are used, the treated H2O has no inauspicious consequence on beings that subsequently devour it, as may be the instance with other methods. UV radiation causes harm to the familial construction of bacteriums, viruses, and other pathogens, doing them incapable of reproduction. The cardinal disadvantages of UV disinfection are the demand for frequent lamp care and replacing and the demand for a extremely treated wastewater to guarantee that the mark micro-organisms are non shielded from the UV radiation ( i.e. , any solids nowadays in the treated wastewater may protect micro-organisms from the UV visible radiation ) . In the United Kingdom, UV visible radiation is going the most common agencies of disinfection because of the concerns about the impacts of Cl in chlorinating residuary organics in the effluent and in chlorinating organics in the receiving H2O. Some sewerage intervention s ystems in Canada and the US besides use UV visible radiation for their outflowing H2O disinfection. Ozone ( O3 ) is generated by go throughing O ( O2 ) through a high electromotive force possible resulting in a 3rd O atom going attached and organizing O3. Ozone is really unstable and reactive and oxidizes most organic stuff it comes in contact with, thereby destructing many infective micro-organisms. Ozone is considered to be safer than Cl because, unlike Cl which has to be stored on site ( extremely toxicant in the event of an inadvertent release ) , ozone is generated onsite as needed. Ozonation besides produces fewer disinfection byproducts than chlorination. A disadvantage of ozone disinfection is the high cost of the ozone coevals equipment and the demands for particular operators. ODOUR CONTROL Smells emitted by sewerage intervention are typically an indicant of an anaerobic or â€Å" infected † status. Early phases of processing will be given to bring forth fetid gases, with H sulphide being most common in bring forthing ailments. Large procedure workss in urban countries will frequently handle the smells with C reactors, a contact media with bio-slimes, little doses of Cl, or go arounding fluids to biologically capture and metabolise the objectionable gases. Other methods of odour control exist, including add-on of Fe salts, H peroxide, Ca nitrate, etc. to pull off H sulphide degrees. Package Plants AND BATCH REACTORS To utilize less infinite, dainty hard waste and intermittent flows, a figure of designs of intercrossed intervention workss have been produced. Such workss frequently combine at least two phases of the three chief intervention phases into one combined phase. In the UK, where a big figure of effluent intervention workss serve little populations, bundle workss are a feasible option to constructing a big construction for each procedure phase. In the US, bundle workss are typically used in rural countries, main road remainder Michigans and dawdler Parkss. One type of system that combines secondary intervention and colony is the sequencing batch reactor ( SBR ) . Typically, activated sludge is assorted with natural entrance sewerage, and so assorted and aerated. The settled sludge is run away and re-aerated before a proportion is returned to the headworks. SBR workss are now being deployed in many parts of the universe. The disadvantage of the SBR procedure is that it requires a precise control of timing, blending and aeration. This preciseness is typically achieved with computing machine controls linked to detectors. Such a complex, delicate system is unsuited to topographic points where controls may be undependable, ill maintained, or where the power supply may be intermittent. Extended aeration bundle workss use separate basins for aeration and subsiding, and are slightly larger than SBR workss with decreased timing sensitiveness. Package workss may be referred to every bit high charged or low charged. This refers to the manner the biological burden is processed. In high charged systems, the biological phase is presented with a high organic burden and the combined floc and organic stuff is so oxygenated for a few hours before being charged once more with a new burden. In the low charged system the biological phase contains a low organic burden and is combined with flocculate for longer times. SLUDGE TREATMENT AND DISPOSAL The sludges accumulated in a effluent intervention procedure must be treated and disposed of in a safe and effectual mode. The intent of digestion is to cut down the sum of organic affair and the figure of disease-causing micro-organisms present in the solids. The most common intervention options include anaerobiotic digestion, aerophilic digestion, and composting. Incineration is besides used albeit to a much lesser grade. Sludge intervention depends on the sum of solids generated and other site-specific conditions. Composting is most frequently applied to small-scale workss with aerophilic digestion for mid sized operations, and anaerobiotic digestion for the larger-scale operations. ANAEROBIC DIGESTION Anaerobic digestion is a bacterial procedure that is carried out in the absence of O. The procedure can either be thermophilic digestion, in which sludge is fermented in armored combat vehicles at a temperature of 55A °C, or mesophilic, at a temperature of around 36A °C. Though leting shorter keeping clip ( and therefore smaller armored combat vehicles ) , thermophilic digestion is more expensive in footings of energy ingestion for heating the sludge. Anaerobic digestion is the most common ( mesophilic ) intervention of domestic sewerage in infected armored combat vehicles, which usually retain the sewerage from one twenty-four hours to two yearss, cut downing the BOD by approximately 35 to 40 per centum. This decrease can be increased with a combination of anaerobiotic and aerophilic intervention by put ining Aerobic Treatment Units ( ATUs ) in the infected armored combat vehicle. One major characteristic of anaerobiotic digestion is the production of biogas ( with the most utile constituent being methane ) , which can be used in generators for electricity production and/or in boilers for warming intents. AEROBIC DIGESTION Aerobic digestion is a bacterial procedure happening in the presence of O. Under aerophilic conditions, bacteriums quickly consume organic affair and change over it into C dioxide. The operating costs used to be characteristically much greater for aerophilic digestion because of the energy used by the blowers, pumps and motors needed to add O to the procedure. Aerobic digestion can besides be achieved by utilizing diffuser systems or jet aerators to oxidise the sludge. COMPOSTING Composting is besides an aerophilic procedure that involves blending the sludge with beginnings of C such as sawdust, straw or wood french friess. In the presence of O, bacterium digest both the effluent solids and the added C beginning and, in making so, produce a big sum of heat. Incineration Incineration of sludge is less common because of air emanations concerns and the auxiliary fuel ( typically natural gases or fuel oil ) required to fire the low calorific value sludge and zap residuary H2O. Stepped multiple fireplace incinerators with high abode clip and fluidized bed incinerators are the most common systems used to burn effluent sludge. Co-firing in municipal waste-to-energy workss is on occasion done, this option being less expensive presuming the installations already exist for solid waste and there is no demand for subsidiary fuel. Chapter THREE TERTIARY TREATMENT 3.1 SLUDGE DISPOSAL When a liquid sludge is produced, farther intervention may be required to do it suited for concluding disposal. Typically, sludges are thickened ( dewatered ) to cut down the volumes transported off-site for disposal. There is no procedure which wholly eliminates the demand to dispose of biosolids. There is, nevertheless, an extra measure some metropoliss are taking to superheat sludge and change over it into little pelletized granules that are high in N and other organic stuffs. In New York City, for illustration, several sewerage intervention workss have dewatering installations that use big extractors along with the add-on of chemicals such as polymer to farther take liquid from the sludge. The removed fluid, called centrate, is typically reintroduced into the effluent procedure. The merchandise which is left is called â€Å" bar † and that is picked up by companies which turn it into fertilizer pellets. This merchandise is so sold to local husbandmans and sod farms as a di rt amendment or fertiliser, cut downing the sum of infinite required to dispose of sludge in landfills. Much sludge arising from commercial or industrial countries is contaminated with toxic stuffs that are released into the cloacas from the industrial procedures. Elevated concentrations of such stuffs may do the sludge unsuitable for agricultural usage and it may so hold to be incinerated or disposed of to landfill. 3.2 TREATMENT IN THE RECEIVING ENVIRONMENT Many procedures in a effluent intervention works are designed to mime the natural intervention processes that occur in the environment, whether that environment is a natural H2O organic structure or the land. If non overloaded, bacteriums in the environment will devour organic contaminations, although this will cut down the degrees of O in the H2O and may significantly alter the overall ecology of the receiving H2O. Native bacterial populations feed on the organic contaminations, and the Numberss of disease-causing micro-organisms are reduced by natural environmental conditions such as predation or exposure to ultraviolet radiation. Consequently, in instances where the receiving environment provides a high degree of dilution, a high grade of effluent intervention may non be required. However, recent grounds has demonstrated that really low degrees of specific contaminations in effluent, including endocrines ( from animate being farming and residue from human hormonal contraceptive me thod methods ) and man-made stuffs such as phthalates that mimic endocrines in their action, can hold an unpredictable inauspicious impact on the natural biology and potentially on worlds if the H2O is re-used for imbibing H2O. [ 21 ] In the US and EU, uncontrolled discharges of effluent to the environment are non permitted under jurisprudence, and rigorous H2O quality demands are to be met. ( For demands in the US, see Clean Water Act. ) A important menace in the coming decennaries will be the increasing uncontrolled discharges of effluent within quickly developing states. 3.3 SEWAGE TREATMENT IN DEVELOPING COUNTRIES Few dependable figures on the portion of the effluent collected in cloacas that is being treated in the universe exist. In many developing states the majority of domestic and industrial effluent is discharged without any intervention or after primary intervention merely. In Latin America about 15 % of gathered effluent base on ballss through intervention workss ( with varying degrees of existent intervention ) . In Venezuela, a below mean state in South America with regard to wastewater intervention, 97 per centum of the state ‘s sewerage is discharged natural into the environment. In a comparatively developed Middle Eastern state such as Iran, Tehran ‘s bulk of population has wholly untreated sewerage injected to the metropolis ‘s groundwater. However now the building of major parts of the sewerage system, aggregation and intervention, in Tehran is about complete, and under development, due to be to the full completed by the terminal of 2012. In Israel, approximately 50 per centum of agricultural H2O use ( entire usage was 1 billion three-dimensional meters in 2008 ) is provided through reclaimed cloaca H2O. Future programs call for increased usage of treated cloaca H2O every bit good as more desalinization workss.

The Tell-Tale Heart The Greatness of Insanity - Free Essay Example

Sample details Pages: 2 Words: 739 Downloads: 3 Date added: 2019/08/12 Category Literature Essay Level High school Tags: The Tell-Tale Heart Essay Did you like this example? Edgar Allan Poe, a worldwide renowned author, lived a short, yet otherworldly life, and made a prosperous living writing his iconic themes of horror, murder, and mystery, all recognized throughout his famous short story, The Tell-Tale Heart. In Poes, The Tell-Tale Heart, he does not specifically characterize the narrators gender, contradicting the motive to kill and murder the old man. The reader assumes that the narrator is a male due to the violent tendencies displayed throughout the text, such as dragging him to the floor, and pulling the heavy bed over him, to the dismembering of the corpse by cutting off the head and the arms and the legs (Poe, 195, 196). The narrator acts upon their instincts and reveals that he has the desire to be dominant. Don’t waste time! Our writers will create an original "The Tell-Tale Heart: The Greatness of Insanity" essay for you Create order If the reader were to place this story from a feminist perspective, in this particular time frame, women were perceived and mistaken to be weak and unintelligent, in which the superiority of men has taken over them. In the story, the narrator loved the old man, which could resemble a womans gentle care and hospitality for him, but because of this pale blue eye, and these violent tendencies, she would be thought of to be plagued by this, and that madmen have absolutely nothing against the willpower of a womans insight to kill (Poe, 193). The whole plot took a total of eight nights for the narrator to finally decide to murder this old man, which if it was in a feminist point of view, a woman would thoroughly consider her decisions and make use of her time. Although Poe leaves the narrators gender unidentified, the perspective could be a combination of both the feminist and masculine point of view. The storyteller portrays both feminine and masculine qualities, seen in a quote from the story, I knew what the old man felt, which is the feminine side, although I chuckled at heart, which is the masculine side (Poe, 194). In The Tell-Tale Heart, the protagonists fear of the old mans eye is the main reason as to what drove him to dismember him and put him underneath the floorboard (Poe, 196). The psychoanalytical perspective of the narrator reveals that he, or she, was not angry and had nothing to fear, which means that they were in rejection over the crime and had lost a sense of their unconscious mind. The storys narrator had no valid reason to kill the old man except that he had the eye of a vulture a pale blue eye, with a film over it and after he was dead, they soon realized that it was a mistake because they were not thinking clearly (Poe, 193). This explains the beating of the heart that grew louder and louder, showing his pure insanity and guilt of the crime that was committed. Two literary elements found in The Tell-Tale Heart, is imagery and symbolism. Imagery is seen in the story because as the reader reads the text, he or she can visualize the multiple scenes of the narrator gently observing the old man every night and his pale blue eye, causing them to kill the old man because of his maniacal condition. This image of the eye helps the reader begin to understand what it is that really terrifies the narrator and what prompts him to get rid of it. Symbolism is also found in the story because of the eye depicting that it sees everything, which causes the narrator to be disturbed and tormented, explaining his insanity, and the heart, which represents the narrators guilt when they killed the old man. Both aspects are effective in the story because it gives the reader a narrower understanding of why the narrator planned to kill the old man. Poe, growing up as a child, did not really understand the concept of life and death, which could have contributed to the narrators thinking that even if he had killed the old man, he would still come back to life. He thought that the eye was still alive and so was his heartbeat, which could have meant that the old man was still lingering around, even after he was brutally murdered. The narrator of the story was out of his mind and unreliable. Rather than being concerned with the murder or the consequences of their actions, the narrator is obsessed with proving their sanity, and obsession with this eye, leading to the death of the old man.