Dissertations / Theses: 'Wastewater management'

1

Rowse, John William. "A framework for comparison of on-site wastewater management and centralised wastewater management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0021/MQ54579.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Palmquist, Helena. "Hazardous substances in wastewater management /." Luleå, 2004. http://epubl.luth.se/1402-1544/2004/47.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ugarelli, Rita Maria <1973&gt. "Asset management of wastewater networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/878/1/Tesi_Ugarelli_Rita_Maria.pdf.

Full text

Abstract:

Asset Management (AM) is a set of procedures operable at the strategic-tacticaloperational level, for the management of the physical asset’s performance, associated risks and costs within its whole life-cycle. AM combines the engineering, managerial and informatics points of view. In addition to internal drivers, AM is driven by the demands of customers (social pull) and regulators (environmental mandates and economic considerations). AM can follow either a top-down or a bottom-up approach. Considering rehabilitation planning at the bottom-up level, the main issue would be to rehabilitate the right pipe at the right time with the right technique. Finding the right pipe may be possible and practicable, but determining the timeliness of the rehabilitation and the choice of the techniques adopted to rehabilitate is a bit abstruse. It is a truism that rehabilitating an asset too early is unwise, just as doing it late may have entailed extra expenses en route, in addition to the cost of the exercise of rehabilitation per se. One is confronted with a typical ‘Hamlet-isque dilemma’ – ‘to repair or not to repair’; or put in another way, ‘to replace or not to replace’. The decision in this case is governed by three factors, not necessarily interrelated – quality of customer service, costs and budget in the life cycle of the asset in question. The goal of replacement planning is to find the juncture in the asset’s life cycle where the cost of replacement is balanced by the rising maintenance costs and the declining level of service. System maintenance aims at improving performance and maintaining the asset in good working condition for as long as possible. Effective planning is used to target maintenance activities to meet these goals and minimize costly exigencies. The main objective of this dissertation is to develop a process-model for asset replacement planning. The aim of the model is to determine the optimal pipe replacement year by comparing, temporally, the annual operating and maintenance costs of the existing asset and the annuity of the investment in a new equivalent pipe, at the best market price. It is proposed that risk cost provide an appropriate framework to decide the balance between investment for replacing or operational expenditures for maintaining an asset. The model describes a practical approach to estimate when an asset should be replaced. A comprehensive list of criteria to be considered is outlined, the main criteria being a visà- vis between maintenance and replacement expenditures. The costs to maintain the assets should be described by a cost function related to the asset type, the risks to the safety of people and property owing to declining condition of asset, and the predicted frequency of failures. The cost functions reflect the condition of the existing asset at the time the decision to maintain or replace is taken: age, level of deterioration, risk of failure. The process model is applied in the wastewater network of Oslo, the capital city of Norway, and uses available real-world information to forecast life-cycle costs of maintenance and rehabilitation strategies and support infrastructure management decisions. The case study provides an insight into the various definitions of ‘asset lifetime’ – service life, economic life and physical life. The results recommend that one common value for lifetime should not be applied to the all the pipelines in the stock for investment planning in the long-term period; rather it would be wiser to define different values for different cohorts of pipelines to reduce the uncertainties associated with generalisations for simplification. It is envisaged that more criteria the municipality is able to include, to estimate maintenance costs for the existing assets, the more precise will the estimation of the expected service life be. The ability to include social costs enables to compute the asset life, not only based on its physical characterisation, but also on the sensitivity of network areas to social impact of failures. The type of economic analysis is very sensitive to model parameters that are difficult to determine accurately. The main value of this approach is the effort to demonstrate that it is possible to include, in decision-making, factors as the cost of the risk associated with a decline in level of performance, the level of this deterioration and the asset’s depreciation rate, without looking at age as the sole criterion for making decisions regarding replacements.

APA, Harvard, Vancouver, ISO, and other styles

4

Ugarelli, Rita Maria <1973&gt. "Asset management of wastewater networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/878/.

Full text

Abstract:

Asset Management (AM) is a set of procedures operable at the strategic-tacticaloperational level, for the management of the physical asset’s performance, associated risks and costs within its whole life-cycle. AM combines the engineering, managerial and informatics points of view. In addition to internal drivers, AM is driven by the demands of customers (social pull) and regulators (environmental mandates and economic considerations). AM can follow either a top-down or a bottom-up approach. Considering rehabilitation planning at the bottom-up level, the main issue would be to rehabilitate the right pipe at the right time with the right technique. Finding the right pipe may be possible and practicable, but determining the timeliness of the rehabilitation and the choice of the techniques adopted to rehabilitate is a bit abstruse. It is a truism that rehabilitating an asset too early is unwise, just as doing it late may have entailed extra expenses en route, in addition to the cost of the exercise of rehabilitation per se. One is confronted with a typical ‘Hamlet-isque dilemma’ – ‘to repair or not to repair’; or put in another way, ‘to replace or not to replace’. The decision in this case is governed by three factors, not necessarily interrelated – quality of customer service, costs and budget in the life cycle of the asset in question. The goal of replacement planning is to find the juncture in the asset’s life cycle where the cost of replacement is balanced by the rising maintenance costs and the declining level of service. System maintenance aims at improving performance and maintaining the asset in good working condition for as long as possible. Effective planning is used to target maintenance activities to meet these goals and minimize costly exigencies. The main objective of this dissertation is to develop a process-model for asset replacement planning. The aim of the model is to determine the optimal pipe replacement year by comparing, temporally, the annual operating and maintenance costs of the existing asset and the annuity of the investment in a new equivalent pipe, at the best market price. It is proposed that risk cost provide an appropriate framework to decide the balance between investment for replacing or operational expenditures for maintaining an asset. The model describes a practical approach to estimate when an asset should be replaced. A comprehensive list of criteria to be considered is outlined, the main criteria being a visà- vis between maintenance and replacement expenditures. The costs to maintain the assets should be described by a cost function related to the asset type, the risks to the safety of people and property owing to declining condition of asset, and the predicted frequency of failures. The cost functions reflect the condition of the existing asset at the time the decision to maintain or replace is taken: age, level of deterioration, risk of failure. The process model is applied in the wastewater network of Oslo, the capital city of Norway, and uses available real-world information to forecast life-cycle costs of maintenance and rehabilitation strategies and support infrastructure management decisions. The case study provides an insight into the various definitions of ‘asset lifetime’ – service life, economic life and physical life. The results recommend that one common value for lifetime should not be applied to the all the pipelines in the stock for investment planning in the long-term period; rather it would be wiser to define different values for different cohorts of pipelines to reduce the uncertainties associated with generalisations for simplification. It is envisaged that more criteria the municipality is able to include, to estimate maintenance costs for the existing assets, the more precise will the estimation of the expected service life be. The ability to include social costs enables to compute the asset life, not only based on its physical characterisation, but also on the sensitivity of network areas to social impact of failures. The type of economic analysis is very sensitive to model parameters that are difficult to determine accurately. The main value of this approach is the effort to demonstrate that it is possible to include, in decision-making, factors as the cost of the risk associated with a decline in level of performance, the level of this deterioration and the asset’s depreciation rate, without looking at age as the sole criterion for making decisions regarding replacements.

APA, Harvard, Vancouver, ISO, and other styles

5

Miles, Leon Anthony. "Knowledge management and environmental management." Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365193.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Palmquist, Helena. "Hazardous substances in wastewater systems : a delicate issue for wastewater management." Licentiate thesis, Luleå tekniska universitet, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17510.

Full text

Abstract:

Many substances derived from human activity end up in wastewater systems at some point. A large number of different substances - up to 30,000 - are present in wastewater. Some of them are valuable, such as nitrogen and phosphorus, but there are also hazardous substances such as heavy metals and anthropogenic organic substances. To be able to utilise the wastewater nutrients on arable land (agriculture, forestry or other alternatives), it is of great importance to investigate the sources of hazardous substances in wastewater and the human activities and attitudes that brings these different substances into the wastewater systems. For management of wastewater residues it is therefore important to be able to assess both the benefits and the risks from such products. Residues from wastewater are complex mixtures of substances, which demand a multi-sided approach for solving the problem as a whole.
Godkänd; 2001; 20070225 (ysko)

APA, Harvard, Vancouver, ISO, and other styles

7

Bhattacharya, Mahua M. Eng Massachusetts Institute of Technology. "Wastewater sludge management options for Honduras." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/50618.

Full text

Abstract:

Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2009.
Includes bibliographical references (leaves 48-50).
Sludge management is a fundamental area of concern across wastewater treatment systems in Honduras. The lack of timely sludge removal has led to declining plant performance in many facilities throughout the country. In addition to maintaining treatment efficiency, proper sludge management is important for mitigating pathogen levels and providing opportunities for safe beneficial reuse of biosolids. Based on analyses of data collected at waste stabilization ponds in the municipalities of Puerto Cortes and La Lima, sludge was characterized with respect to quantities generated (accumulation rates) and quality (helminths and heavy metals content). A review was conducted of appropriate sludge treatment technologies including sludge drying beds, alkaline stabilization, acid stabilization, anaerobic digestion, and composting. These options were evaluated based on a set of selected criteria. Anaerobic digestion, alkaline stabilization, and composting were all found to be suitable methods of sludge treatment. Alkaline stabilization and composting are well suited to facilities with sufficient land. Anaerobic digestion was recommended for areas with land constraints. Treated biosolids can be beneficially used within the community and/or at a regional scale. Potential regional end-uses include soil amendment in agriculture and forestry, or for land reclamation of mined lands. Public participation and acceptance is essential for the success of a biosolids reuse program. Potential strategies for engaging the community and addressing public concerns regarding biosolids were identified.
by Mahua Bhattacharya.
M.Eng.

APA, Harvard, Vancouver, ISO, and other styles

8

Dey, Ayanangshu. "NUTRIENT MANAGEMENT IN ON-SITE WASTEWATER TREATMENT." MSSTATE, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11052009-110323/.

Full text

Abstract:

Groundwater and surface water contamination has been linked in the past to inadequate or failing on-site wastewater treatment and disposal systems. The on-site wastewater systems installed in coastal areas have more potential for inflicting this kind of environmental damage. This work studied the regulatory compliance and environmental protection of the four types of on-site wastewater disposal systems found on the Mississippi Gulf Coast; i.e., vegetative rock filter, subsurface drip irrigation, sand mound, and sprinkler systems, by statistical techniques. Compliance was also evaluated for groundwater samples collected from monitoring wells installed at four corners of a disposal field. This work eventually culminated in formulation of strategy for modifying the aerobic treatment prior to disposal to help reduce nitrogen loading on the discharging environment. Process modeling and simulations were performed to optimize conditions for biological nitrogen reduction in the treatment unit by efficient management of aeration. Two separate proposals were developed, such as either running the aerator unit in a low operating dissolved oxygen concentration or intermittent aeration mode.

APA, Harvard, Vancouver, ISO, and other styles

9

Lozano, Sacha. "An Ecological Design Approach to Wastewater Management." ScholarWorks @ UVM, 2008. http://scholarworks.uvm.edu/graddis/141.

Full text

Abstract:

Global water depletion and unsustainable food production systems represent two iconic crises of our time. These two crises have important themes in common, referring to basic human needs and the way we interact with landscapes in order to satisfy them. But they are also closely related to the way we produce and dispose wastes in our current societal organization. Insufficient, or inadequate, sanitation and waste management practices continue to undermine not only human well-being, but the entire planet’s ecological integrity, on which humans depend. An ecological design approach to manage human waste invites to learn how to participate more harmoniously within the planet’s recycling of matter, using renewable energy sources and mimicking nature’s low entropic states to maintain the life-support systems that we and our economies are part of. This thesis is an in-depth exploration of such an approach, and an attempt to integrate several elements from ecology, engineering, economics, and community development, around issues of water quality, sanitation and waste management in Latin America. As a whole, the thesis explores how can this transdisciplinary approach translate into coherent, feasible, and concrete action, providing appropriate solutions for sanitation, in ways that are effective and viable on a long term, for Latin American rural communities. Three different papers address different dimensions of the problem, focusing on domestic wastewater and human excreta, as a type of waste of major importance to ecological integrity, public health and economic development. Two of the papers are case studies, carried out at two different rural communities in South West Colombia; one of them focuses on technological and ecological aspects, and the other focuses on social and economic considerations, for a multifunctional-ecological waste management. In the first paper I present an overview of the sanitation problem in Latin America, and the opportunities and challenges of managing waste with an ecological and multifunctional perspective. More specifically, this papers attempts to provide a sound conceptual framework for managing wastewater (sewage) as a valuable resource, in a way that: 1) is affordable –or even profitable– by small communities in developing countries; 2) is safe to the environment and to public health; and 3) provides opportunities for recycling nutrients and organic matter (available in wastewaters), to restore and protect water and soil resources, while enhancing rural livelihoods in tropical agroecosystems. The second paper evaluates the performance and feasibility of an experimental, solar-energy-based, wetland mesocosm, as a complementary aerobic unit to enhance anaerobic wastewater treatment, in a rural locality of the Cauca Valley in Colombia. In the third paper I explore the integration between ecological design and community-based solutions to sanitation, and discuss opportunities and challenges of implementing ecological waste management in the particular bioregional and socioeconomic context of a proposed ecological-low-income co-housing project, in another rural community of Colombia. In doing this, several arguments are presented to support the idea that assuming the responsibility of managing its own waste can be a powerful and transformative experience for a community to fundamentally change its perspective and understanding of its place within the planet. Furthermore, managing waste can be an integrative force linking economic, social and environmental considerations, and favoring human-scale development, genuine progress, and self-reliance in a community. In its broadest level my research aims at reviewing and questioning the very notion of “waste” and the articulation between humans, nature, and technology within that context.

APA, Harvard, Vancouver, ISO, and other styles

10

Tuan, Tong Anh Sittipong Dilokwanich. "Industrial wastewater management of Nhue river, Vietnam /." Abstract, 2006. http://mulinet3.li.mahidol.ac.th/thesis/2549/cd387/4737900.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Tidåker, Pernilla. "Integrating farming and wastewater management : a system perspective /." Uppsala : Dept. of Biometry and Engineering, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200785.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Harper, Stephen Ray. "Evaluation of hydrogen management during anaerobic wastewater treatment." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/23127.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Yu, Chi-wing, and 余志榮. "An overview of wastewater management in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31253015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Yu, Chi-wing. "An overview of wastewater management in Hong Kong /." [Hong Kong] : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13814035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Tecle, Aregai, and Martin Fogel. "Multiobjective Wastewater Management Planning in a Semiarid Region." Arizona-Nevada Academy of Science, 1986. http://hdl.handle.net/10150/296390.

Full text

Abstract:

From the Proceedings of the 1986 Meetings of the Arizona Section - American Water Resources Association, Hydrology Section - Arizona-Nevada Academy of Science and the Arizona Hydrological Society - April 19, 1986, Glendale Community College, Glendale, Arizona

APA, Harvard, Vancouver, ISO, and other styles

16

Ahmadi, Leila. "Planning and Management Modeling For Treated Wastewater Usage." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1209.

Full text

Abstract:

Two computational models, including several calculation and analysis submodels, were developed to create a tool for assessing the impact of different treated wastewater reuse options on irrigated agriculture. The models consider various aspects of treated wastewater availability (past, present, and future), wastewater quality, agricultural water demand, and the economics of conveying wastewater from treatment plants to farms. The two models were implemented using Visual BASIC.NET in a GIS environment to facilitate visualization of some of the features of an area under study, and to provide a convenient interface for user application. One of the models is for treated wastewater availability calculations, and the other is for wastewater reuse. The water availability model has sub-models including urban population predictions, agricultural land use changes, residential water demand, agricultural water demand (evapotranspiration) for over 40 crop types, and treated wastewater analysis. The water reuse model is composed of three sub-models, including soil water and salt balance calculations, nutrient calculations, and pumping and conveyance costs calculations. The nutrient calculationssub-model is based on an existing model, but was completely rewritten and modified in some parts to accommodate the needs and features of the water reuse model presented herein. A sample application of the models is presented for Cache Valley, Utah. The results show a comparison of treated wastewater reuse schemes for the study area, highlighting how irrigated agriculture would best benefit from the total or partial use of treated wastewater. Two wastewater reuse scenarios were considered. The water availability model shows good agreement with other sources of information in terms of population forecast and calculation of future residential and agricultural water demand. However, according to the results from the model, the rate of increase of the urban area was much higher than the rate of decrease of the agricultural areas between the years 1992 and 2001.The future population growth and water demand increases for urban areas was calculated and validated for Logan City. Also, in the case study the model was shown to be a good tool for wastewater influent analysis for Logan City.

APA, Harvard, Vancouver, ISO, and other styles

17

Garza, Octavio Armando. "Food service establishment wastewater characterization and management practice evaluation." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3220.

Full text

Abstract:

Food service establishments that use onsite wastewater treatment systems are experiencing hydraulic and organic overloading of pretreatment systems and/or drain fields. Design guidelines for these systems are typically provided in State regulations and based on residential hydraulic applications. For the purposes of this research, hydraulic loading indicates the daily flow of water directed to the wastewater system. Organic loading refers to the composition of the wastewater as quantified by five-day biochemical oxygen demand (BOD5), total fats, oils and greases (FOG), and total suspended solids (TSS). The first part of this study included an analysis of the central tendencies of analytical data of four wastewater parameters from 28 restaurants representing a broad spectrum of restaurant types. Field sampling consisted of two sets of grab samples collected from each restaurant for six consecutive days at approximately the same time each day. These sets were collected approximately two weeks apart. The numerical data included BOD5, FOG, and TSS. The fourth parameter evaluated was daily flow. Data exploration and statistical analyses of the numerical data from the 28 restaurants was performed with the standard gamma probability distribution model in ExcelTM and used to determine inferences of the analytical data. The analysis shows higher hydraulic and organic values for restaurant wastewater than residential wastewater. The second part of the study included a statistical analysis of restaurant management practices and primary cuisine types and their influence on BOD5, FOG, TSS, and daily flow to determine if management practices and/or cuisine types may be influencing wastewater composition and flow. A self-reporting survey was utilized to collect management practice and cuisine type information. Survey response information and analytical data were entered into an ExcelTM spreadsheet and subsequently incorporated into SASTM statistical software for statistical analysis. Analysis indicated that the number of seats in a restaurant, use of self-serve salad bars, and primary cuisine types are statistically significant indicators of wastewater characteristics.

APA, Harvard, Vancouver, ISO, and other styles

18

Kam, Kwok-hang Dave, and 甘國恒. "Review on the industrial wastewater management in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31254044.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Cocozza, Peter Andrew. "Management and technology trends in the wastewater treatment industry." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/31070.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Kam, Kwok-hang Dave. "Review on the industrial wastewater management in Hong Kong /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19945437.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Tecle, Aregai 1948. "Multicriterion modeling of wastewater management : a comparison of techniques." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/191908.

Full text

Abstract:

Multicriterion modeling of wastewater management problem is presented in order to select the most preferred wastewater scheme. The Nogales International Wastewater Treatment Plant which serves the binational cities of Nogales, Arizona and Nogales, Sonora is used as case study in the modeling process. The process includes identifying of objectives, specifying of treatment alternatives and defining criteria to relate the objective satisfactum level to the alternative schemes. Six different multicriterion decision making techniques are applied to analyze and obtain preference ordering among the alternative treatment schemes. Analyses on the individual techniques and comparison among them are performed to arrive at the following conclusions: (1) all the techniques except one can be confidently used to obtain complete ordering of alternatives, (2) there is inter-model consistency in the ordering process, (3) in performing this function, the techniques are fairly robust with respect to parameter changes, and (4) only two treatment alternatives of fifteen considered are consistently ranked higher than the rest.

APA, Harvard, Vancouver, ISO, and other styles

22

Hurse, Timothy John. "Sulfide removal from wastewater by phototrophic microorganisms /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16390.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Aulinas, Masó Montse. "Management of industrial wastewater discharges in river basins through agents'argumentation." Doctoral thesis, Universitat de Girona, 2009. http://hdl.handle.net/10803/7804.

Full text

Abstract:

La gestió de l'aigua residual és una tasca complexa. Hi ha moltes substàncies contaminants conegudes però encara moltes per conèixer, i el seu efecte individual o col·lgectiu és difícil de predir. La identificació i avaluació dels impactes ambientals resultants de la interacció entre els sistemes naturals i socials és un assumpte multicriteri. Els gestors ambientals necessiten eines de suport pels seus diagnòstics per tal de solucionar problemes ambientals.
Les contribucions d'aquest treball de recerca són dobles: primer, proposar l'ús d'un enfoc basat en la modelització amb agents per tal de conceptualitzar i integrar tots els elements que estan directament o indirectament involucrats en la gestió de l'aigua residual. Segon, proposar un marc basat en l'argumentació amb l'objectiu de permetre als agents raonar efectivament. La tesi conté alguns exemples reals per tal de mostrar com un marc basat amb agents que argumenten pot suportar diferents interessos i diferents perspectives. Conseqüentment, pot ajudar a construir un diàleg més informat i efectiu i per tant descriure millor les interaccions entre els agents. En aquest document es descriu primer el context estudiat, escalant el problema global de la gestió de la conca fluvial a la gestiódel sistema urbà d'aigües residuals, concretament l'escenari dels abocaments industrials. A continuació, s'analitza el sistema mitjançant la descripció d'agents que interaccionen. Finalment, es descriuen alguns prototips capaços de raonar i deliberar, basats en la lògica no monòtona i en un llenguatge declaratiu (answer set programming).
És important remarcar que aquesta tesi enllaça dues disciplines: l'enginyeria ambiental (concretament l'àrea de la gestió de les aigües residuals) i les ciències de la computació (concretament l'àrea de la intel·ligència artificial), contribuint així a la multidisciplinarietat requerida per fer front al problema estudiat. L'enginyeria ambiental ens proporciona el coneixement del domini mentre que les ciències de la computació ens permeten estructurar i especificar aquest coneixement.
Wastewater management is a very complex task. There is a high number of known and an increasing number of unknown pollutants whose individual and collective effects are very difficult to predict. Identifying and evaluating the impacts of environmental problems resulting from the interactions between our social system and its natural environment is a multifaceted critical issue. Environmental managers require tools to support their diagnoses for solving these problems. The contributions of this research work are twofold: first, to propose the use of an agent-based modelling approach in order to conceptualize and integrate all elements that are directly or indirectly involved in wastewater management. Second, to propose a framework based on argumentation that allows to reason effectively. The thesis provide some real examples to show that an agent-based argumentation framework can deal with multiple interests and different agents' perspectives and goals. This help to build a more effective and informed dialog in order to better describe the interaction between agents. In this document we first describe the context under study, scaling down the global river basins system to the urban wastewater systems and giving some more details for the specific scenario of industrial wastewater discharges. Then, we analyze the system in describing intelligent agents that interact. Finally, we propose some reasoning and deliberation prototypes by using an argumentation framework founded on non-monotonic logics (i.e. permitting to learn things that were previously not known) and the answer set programming specification language (i.e. a declarative programming language). It is important to remark that this thesis links two disciplines: environmental engineering (specifically the area of wastewater management) and computer science (specifically the area of artificial intelligence), contributing to the required multidsciplinarity needed to confront the complexity of the problem under study. From environmental engineering we obtain the domain knowledge whereas the computer science field permits us to structure and specify this knowledge.

APA, Harvard, Vancouver, ISO, and other styles

24

Prat, Busquets Pau. "Integrated management of urban wastewater systems: a model-based approach." Doctoral thesis, Universitat de Girona, 2012. http://hdl.handle.net/10803/80837.

Full text

Abstract:

The main objective pursued in this thesis targets the development and systematization of a methodology that allows addressing management problems in the dynamic operation of Urban Wastewater Systems. The proposed methodology will suggest operational strategies that can improve the overall performance of the system under certain problematic situations through a model-based approach. The proposed methodology has three main steps: The first step includes the characterization and modeling of the case-study, the definition of scenarios, the evaluation criteria and the operational settings that can be manipulated to improve the system’s performance. In the second step, Monte Carlo simulations are launched to evaluate how the system performs for a wide range of operational settings combinations, and a global sensitivity analysis is conducted to rank the most influential operational settings. Finally, the third step consists on a screening methodology applying a multi-criteria analysis to select the best combinations of operational settings.
El principal objectiu d’aquesta tesi és desenvolupar una metodologia que permeti abordar els problemes de gestió del cicle industrial de l’aigua. La metodologia proposada suggereix estratègies de gestió que poden millorar el rendiment general del sistema en determinades situacions problemàtiques. La metodologia proposada es basa en un model matemàtic de simulació d’aquestes infraestructures i consta de tres passos. El primer pas inclou la caracterització i modelització del cas d’estudi, la definició d’escenaris, criteris d’avaluació i paràmetres d’operació del sistema. En el segon pas, es llancen simulacions Monte Carlo (MC) amb l’objectiu d’avaluar com es comporta el sistema segons diferents estratègies d’operació. Per tal d’identificar els paràmetres d’operació més influents es du a terme una anàlisi global de sensibilitat. Finalment, el tercer pas consisteix en una metodologia d’avaluació basada en solucions Pareto i un anàlisi multicriteri per tal de seleccionar les millors estratègies d’operació.

APA, Harvard, Vancouver, ISO, and other styles

25

Schneider, Cory Adam. "Phenotypic fingerprinting as a management tool for wastewater treatment systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/MQ45584.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Salman, Baris. "Infrastructure Management and Deterioration Risk Assessment of Wastewater Collection Systems." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1282051343.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Tavakkoli, Sakineh. "A Systems-level Approach for Integrated Shale Gas Wastewater Management." Thesis, University of Pittsburgh, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13819974.

Full text

Abstract:

Economic benefits of shale gas production in addition to its potential for enabling energy security are driving the strategic development of unconventional natural gas in the U.S. However, shale gas production poses potential detrimental impacts on the surrounding ecosystems. In particular, sustainable management of high salinity wastewater is one of the critical challenges facing shale gas industry. While recycling shale gas wastewater is a practical short-term solution to minimize total water use in the fracturing process it may not be a viable strategy from a long-term management perspective. Moreover, direct disposal into Salt Water Disposal (SWD) wells which is the most common management strategy in the U.S. is not cost effective in Marcellus shale play due to limited disposal capacity.

This work develops a systems-level optimization framework for guiding economically conscious management of high salinity wastewater in Marcellus shale play in Pennsylvania (PA) with a focus on using membrane distillation (MD) as the treatment technology. Detailed technoeconomic assessment (TEA) is performed to assess the economic feasibility of MD for treatment of shale gas wastewater with and without availability of waste heat. Natural gas compressor stations (NG CS) are chosen as potential sources of waste heat and rigorous thermodynamic models are developed to quantify the waste heat recovery opportunities from NG CS. The information from waste heat estimation and TEA are then utilized in the optimization framework for investigating the optimal management of shale gas wastewater. Wastewater management alternatives ranging from direct disposal into SWD wells to advanced centralized, decentralized, and onsite treatment options using MD are included in the optimization model.

The optimization framework is applied to four case studies in Greene and Washington counties in southwest and Susquehanna and Bradford counties in Northeast PA where major shale gas development activities take place. The results of this analysis reveal that onsite treatment of wastewater at shale gas extraction sites in addition to treating wastewater at NG CS where available waste heat could be utilized to offset the energy requirements of treatment process are the most economically promising management options that result in major economic benefit over direct disposal into SWD.

APA, Harvard, Vancouver, ISO, and other styles

28

Gaslightwala, Abizer F. (Abizer Firoze) 1973. "Evaluation wastewater treatment technologies at Ford Powertrain." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9001.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, 2000.
Includes bibliographical references (p. 80).
In preparation for an upcoming EPA proposal regarding Free Oil & Grease (FOG) and metal ion content in wastewater effluent, a study was performed for Ford Motor Company that assesses various seconctary wastewater treatment technologies. The three water purification technologies, membrane filtration, biological treatment, and clay media adsorption, were evaluated as secondary water treatment solutions for oily wastewater. Three different types of membrane technologies were tested: polymeric, ceramic, and sintered stainless steel. In regards to FOG, the membrane technologies and the clay media were able to reduce FOG levels below the EPA proposal of 17 mg/L. However, the clay media did not show a strong affinity for metal ions. The membrane technologies were 'lble to reduce all iron levels below the recommended limits (1.3 mg/L). However, they were not able to reduce aluminum below the proposed limit (I mg/L). This implies that additional downstream processing would be required to remove the aluminum if the membrane solution was implemented and the regulation passes as proposed. The biological wastewater treatment was not tested during these trials, but was assumed to be able to meet all FOG and metal requirements proposed by the EPA. Based on these experimental results and basic design assumptions, an economic analysis over a ten-year period indicated that the biological waste treatment system was the lowest in costs, followed by the polymeric membranes. The estimated installed and operating costs for both technologies was $800,000 and $1,200,000 respectively. The nearest alternative solution, the stainless steel membranes, was over 200% more expensive than the lowest cost option. Based on this economic analysis, Ford should pursue additional research and experiments into the feasibility of using biological wastewater treatment to meet EPA proposed regulations. More specifically, experiments should be conducted to help verify the assumptions used and economic results obtained in this study. As a secondary option, in the absence of additional data, polymeric membranes are recommended as the best solution, despite additional processing needed to remove aluminum ions from water effluent. In addition, the biological waste treatment option has the potential to reduce chemical oxygen demand (COD) measurements below the levels seen by any of the membrane technologies. None of the membrane technologies investigated were capable of reducing COD levels below 200 mg/L on a consistent basis, thus indicating that this might be a fixed barrier for these technologies. Although not relevant today, COD measurements might have significant importance in future EPA water regulations, and should be taken into account when recommending a treatment solution.
by Abizer F. Gaslightwala.
S.M.

APA, Harvard, Vancouver, ISO, and other styles

29

Cutbill, Linda Beverley. "Urban stormwater treatment by artificial wetlands." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266138.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Reutershan, Trevor. "Chemical Kinetics and Adsorption in Wastewater Treatment Systems." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10752236.

Full text

Abstract:

The purpose of this thesis is to provide a combined theoretical and experimental approach to solve several enduring questions in wastewater chemistry. Firstly, the sulfate radical has been proposed as an alternative oxidant in advanced oxidation processes (AOPs). Its reactivity with dissolved organic matter (DOM) has not yet been studied and will be quantied in this work using electron pulse radiolysis. Next, it has been shown that DOM present in wastewater can act to impede the remediation of harmful pharmaceutical contaminants in the AOP. Using a new binding model presented here, this association was quantied in terms of equilibrium constants. Lastly, due to the use of bleach to prevent biofouling of the membrane bioreactor in wastewater treatment facilities, chlorine atom chemistry is becoming increasingly important to study regarding AOPs. A numerical system is provided in this thesis to understand the reactivity of chlorine atoms in the presence of wastewater constituents.

APA, Harvard, Vancouver, ISO, and other styles

31

Lessard, Paul. "Operational water quality management : control of stormwater discharges." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47538.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Parkinson, Jonathan Neil. "Modelling strategies for sustainable domestic wastewater management in a residential catchment." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/7449.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Al-Gunied, Hussien Alawi. "Environmental impact asssessment of wastewater management in the Republic of Yemen." Thesis, University of Salford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244833.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Plana, Puig Queralt. "Automated Data Collection and Management at Enhanced Lagoons for Wastewater Treatment." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26531.

Full text

Abstract:

Les stations de mesure automatiques sont utilisées pour suivre et contrôler des usines de traitement des eaux usées. Ce suivi en continu à haute fréquence est devenu indispensable afin de réduire les impacts négatifs sur l’environnement car les caractéristiques de l’eau varient rapidement dans l’espace et dans le temps. Toutefois, même s’il y a eu des progrès considérables, ces dernières années, de la technologie de mesure, les instruments sont encore chers. Aussi des problèmes de colmatage, d’encrassement ou de mauvaise calibration sont assez fréquents à cause du contact avec les eaux usées. La fiabilité des mesures en ligne et en continu est affectée négativement. Par conséquent, un bon entretien des instruments est essentiel, ainsi que la validation des données collectées, afin de détecter d’éventuelles valeurs aberrantes. Dans le contexte de ce mémoire, en collaboration avec Bionest®, une méthodologie est proposée pour attaquer ces problèmes. Deux cas d’études en étangs aérés au Québec ont été considérés, avec l’objectif d’optimiser les activités d’entretien, de réduire les données non fiables et d’obtenir des grandes séries de données représentatives.
Automated monitoring stations have been used to monitor and control wastewater treatment plants. Their capability to monitor at high frequency has become essential to reduce the negative impacts to the environment since the wastewater characteristics have an elevated spatial and time variability. Over the last few years, the technology used to build these automatic monitoring stations, for example the sensors, has been improved. However, the instrumentation is still expensive. Also, in wastewater uses, basic problems like fouling, bad calibration or clogging are frequently affecting the reliability of the continuous on-line measurements. Thus, a good maintenance of the instruments, as well as a validation of the collected data to detect faults is required. In the context of this thesis, in collaboration with Bionest®, a methodology has been developed to deal with these problems for two facultative/aerated lagoon case studies in Québec, with the objective of optimizing the maintenance activities, of reducing the fraction of unreliable data and of obtaining large representative data series.

APA, Harvard, Vancouver, ISO, and other styles

35

Vedachalam, Sridhar. "Attitudinal, Economic and Technological Approaches to Wastewater Management in Rural Ohio." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306819286.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Hodges, Alan J. "Alternative Treatment Technologies for Low-Cost Industrial and Municipal Wastewater Management." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5884.

Full text

Abstract:

Roughly the same volume of water that rushes over the Niagara Falls is produced as wastewater in North America. This wastewater is treated through a variety of means to ensure that it can be safely returned to the natural ecosystem. This thesis examines two novel means for this treatment, one biological and one physical-chemical in nature, namely, Rotating Algae Biofilm Reactor treatment and expanded shale augmented coagulation-flocculation. Rotating algae biofilm reactors (RABRs) support biofilm algae growth, and in turn, the algae take up harmful contaminants from the wastewater. This system was tested in wastewater from petroleum refining operations. The efficacy of the RABR system was compared with a traditional method of wastewater treatment, open pond lagoons, where wastewater is open to sunlight and algae growth occurs in suspension as compared to the biofilm formed by the RABR system. The RABR treatment demonstrated a statistically significant increase in removal of three constituents in wastewater that are harmful to the environment: nitrogen, phosphorus, and suspended solids. Additionally, the RABR treatment demonstrated increased biomass production. This biomass can be converted into a variety of bioproducts including biofuels, agricultural feed, and nutraceuticals. This study is the first demonstration of this system in petroleum refining wastewater. Currently, many wastewater treatment facilities use coagulation-flocculation to remove suspended solids from the wastewater. To achieve this removal, coagulants are added to the wastewater, which removes surface charges of the suspended particles, allowing particles in solution to coalesce and settle by gravity out of solution. One common coagulant added to wastewater is ferric sulfate. This study demonstrated that the addition of a new compound, expanded shale, to ferric sulfate could greatly improve the efficacy of the existing ferric sulfate coagulation system.

APA, Harvard, Vancouver, ISO, and other styles

37

Kapellakis, Iosif Emmanouil. "Olive mill wastewater management and treatment through soil, aquatic and solidification processes." Thesis, Glasgow Caledonian University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Narasimhan, Gautam G. (Gautam Ganti) 1976. "Dynamic data management and modeling in a lagoon based wastewater treatment plant." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/80958.

Full text

Abstract:

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
Includes bibliographical references (leaves 72-73).
by Gautam G. Narasimhan.
M.Eng.

APA, Harvard, Vancouver, ISO, and other styles

39

Beheshti, Monfared Maryam. "Sustainable Management of Wastewater Transport Systems : a case study in Trondheim, Norway." Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198470.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Yaqob, Eyad Y. A. Ph D. ""Prospects for a Shared Management of Transboundary Wastewater Israel-Palestine a case"." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459243132.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

He, Jiajie Dougherty Mark Lange Clifford R. "Hydraulic management of SDI wastewater dispersal in an Alabama Black Belt soil." Auburn, Ala., 2009. http://hdl.handle.net/10415/1973.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Curran, Daniel Thomas. "Phosphate Removal and Recovery from Wastewater by Natural Materials for Ecologically Engineered Wastewater Treatment Systems." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/455.

Full text

Abstract:

Eutrophication due to excess loading of phosphorus (P) is a leading cause of water quality degradation within the United States. The aim of this study was to investigate P removal and recovery with 12 materials (four calcite varieties, wollastonite, dolomite, hydroxylapatite, eggshells, coral sands, biochar, and activated carbon. This was accomplished through a series of batch experiments with synthetic wastewater solutions ranging from 10-100 mg PO₄-P/ L. The results of this study were used to establish large-scale, calcite-based column filter experiments located in the Rubenstein School of Environment and Natural Resources' Eco-Machine. Influent and effluent wastewater samples were routinely collected for 64 days. Measures of filter performance included changes in pH, percent reduction and mass adsorbed of P. After the columns reached saturation, filter media was analyzed for the mineralogical content by X-ray powder diffraction (XRD). In the batch experiments, P removal and recovery varied among the media and across treatments. The best performing minerals were calcite, wollastonite, and hydroxylapatite. Eggshells, activated carbon, and coral sands also reduced and adsorbed P. The remaining materials had the lowest reductions and adsorption of P. Results from batch experiments informed the design of large column filters within the Rubenstein School of the Environment and Natural Resources' Eco-Machine. Removal and adsorption rates of P by the three column filters were similar. The columns achieved an average P reduction of 12.53% (se = 0.98) and an average P adsorption of 0.649 mg PO₄-P/ kg media (se = 0.03) over a 4-h hydraulic retention time. Paired T-tests showed that P reductions were statistically significant (p-value < 0.05) on the majority of sampling dates until the columns reached saturation. Saturation was reached after 31 days for two of the columns and 36 days for the third column. The filter media consistently buffered the pH of the wastewater to approximately 6.0-7.0 with no indication of diminishing buffer capacity after saturation. XRD analysis was not able to detect any P species within the crystalline structure of the filter media. This research contributes to the understanding of how the selected media perform during P removal and recovery programs, while providing information on the performance of large column filters operating within advanced, ecologically engineered wastewater treatment systems.

APA, Harvard, Vancouver, ISO, and other styles

43

Long, Larry Dean. "Transport of cryptosporidium through the perched zone of a wastewater recharge basin." Thesis, The University of Arizona, 1998. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1998_341_sip1_w.pdf&type=application/pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Graan, Daniel, and Rasmus Bäckman. "Energy recovery at Chişinȃu wastewater treatment plant." Thesis, University of Skövde, School of Technology and Society, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-4080.

Full text

Abstract:

Possibilities for energy recovery from sludge at Chişinȃu wastewater treatment plant have been investigated and evaluated. One way of recovering energy from sludge is to produce biogas through anaerobic digestion. Which method of biogas usage that is to prefer in Chişinȃu has been evaluated from a cost-efficiency point of view. There is a possibility that a new waste incineration plant will be built next to the wastewater treatment plant, and therefore solutions that benefit from a co-operation have been discussed. The results show that biogas production would be suitable and profitable in a long time perspective if the gas is used for combined heat and power production. Though, the rather high, economical interest rates in Moldova are an obstacle for profitability.

APA, Harvard, Vancouver, ISO, and other styles

45

Vagadia, Aayushi R. "Comparison of Bacterial and Viral Reduction across Different Wastewater Treatment Processes." Thesis, University of South Florida, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10977800.

Full text

Abstract:

Today billions of people live without access to basic sanitation facilities, and thousands die every week due to diseases caused by fecal contamination associated with improper sanitation. It has thus become crucial for decision makers to have access to relevant and sufficient data to implement appropriate solutions to these problems. The Global Water Pathogen Project http://www.waterpathogens.org/ is dedicated to providing an up-to-date source of data on pathogen reduction associated with different sanitation technologies that are important if the world is to achieve the Sustainable Development Goals (SDGs) related to health and sanitation provision. In this research, a subset of the Global Water Pathogen Project (GWPP) data is used to access the reduction of bacteria and viruses across different mechanical and natural sanitation technologies. The order of expected removal for bacteria during wastewater treatment was reported as highest for a membrane bioreactor (4.4 log10), waste stabilization pond (2.3 log10), conventional activated sludge (1.43 log10), anaerobic anoxic oxic activated sludge (1.9 log10), trickling filter (1.16 log10), and upflow anaerobic sludge blanket reactor (1.2 log10).

Furthermore, the order of expected removal for viruses was reported as highest for a membrane bioreactor (3.3 log10), conventional activated sludge (1.84 log10), anaerobic anoxic oxic activated sludge (1.67 log10), waste stabilization pond (1 log10), upflow anaerobic sludge blanket reactor (0.3 log10) and trickling filter (0.29 log10). It was found that hydraulic retention time (HRT) had a statistically significant relation to the reduction of bacteria in an anaerobic, anoxic oxic treatment system. Similarly, a significant relation was found between the number of waste stabilization ponds in series and the expected reduction of bacteria. HRT was also found to be a significant factor in virus reduction in waste stabilization ponds. Additionally, it was observed that waste stabilization ponds, trickling filters, and UASB reactors could obtain a greater reduction in bacteria (5–7 log10) when combined with additional treatment (e.g., chemical disinfection or use of maturation ponds). Also, mechanized systems, such as activated sludge systems and membrane bioreactors, obtained a greater reduction (2–3 log10) of viruses when compared to a natural system. It was concluded that the selection of the best suitable technology for pathogen reduction depends on environmental, design, and operational factors as well as considering the performance of specific wastewater treatment systems individually as well as when combined with other treatment technologies that may provide added removal of microbial constituents.

APA, Harvard, Vancouver, ISO, and other styles

46

Shamir, Eylon. "Nitrogen Accumulation In A Constructed Wetland For Dairy Wastewater Treatment." Thesis, The University of Arizona, 1998. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0014_m_sip1_w.pdf&type=application/pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Rémy, Christian. "Life cycle assessment of conventional and source separation systems for urban wastewater management /." kostenfrei, 2010. http://opus.kobv.de/tuberlin/volltexte/2010/2543/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Remy, Christian. "Life cycle assessment of conventional and source-separation systems for urban wastewater management." Clausthal-Zellerfeld Papierflieger, 2010. http://d-nb.info/1000877817/04.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Roxendal, Tara. "Designing Sustainable Wastewater Management : A case study at a research farm in Bolivia." Thesis, Institutionen för energi och teknik, Sveriges lantbruksuniversitet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-174255.

Full text

Abstract:

Sustainable sanitation and wastewater management are of increasing importance around the world while certain resources are becoming scarcer and therefore more valuable. The lack of proper wastewater management causes problems and the degradation of some resources. Increasing urbanization in peri-urban areas puts extra stress on the need for finding and implementing sustainable solutions to prevent ground- and surface water contamination. The study aimed to design a more sustainable wastewater management at the farm Ceasip located in the peri-urban area of Santa Cruz de la Sierra, Bolivia. Due to the lack of proper wastewater management on the farm, Ceasip was a likely contributor to the contamination of the groundwater. Of the farm’s different wastewater sources, this study focused on the domestic wastewater and its possible reuse in agriculture. The prioritized sustainability criteria were to prevent groundwater contamination, reduce water usage and recycle nutrients. First various wastewater management options were identified. Next these were evaluated according to the different sustainability criteria previously mentioned. In order to determine a management option, data and information were collected and processed regarding water flows, water quality, physical conditions as well as sustainability criteria within environment, technology, socio-culture, health and economy. Results of the present conditions for Ceasip showed various characteristics, like small water flows, high nitrogen and fecal coliform concentration and clayey soils, from which suitability of different treatments was determined. Urine separation was deemed appropriate for Ceasip to increase the recycling of nutrients as well as reduce the nitrogen levels in wastewater. Treatment ponds and leach fields were designed as two wastewater treatment alternatives. For Ceasip to implement and manage water and wastewater sustainably through one of the mentioned alternatives could have a positive impact for the farm and environment, as well as serve as an example to employees, visitors and other establishments.
El saneamiento y gestión sostenible de las aguas residuales es de creciente importancia en los tiempos modernos. Los recursos naturales son cada vez más escasos y valiosos. Mas aún, la falta del manejo adecuado de aguas residuales es causa importante de la degradación de los recursos restantes. La creciente urbanización en las zonas periurbanas acentúa la necesidad de encontrar e implementar soluciones sostenibles en el manejo de aguas residuales. En estas zonas dicho manejo (colección y tratamiento de aguas residuales) es deficiente. Como consecuencia se percibe una contaminación continua de las aguas subterráneas en estas condiciones. El objetivo del estudio realizado fue diseñar un sistema de gestión de aguas residuales más sostenible para la granja Ceasip ubicada en la zona periurbana de Santa Cruz de la Sierra, Bolivia. El estudio se enfoca principalmente en el manejo de las aguas residuales domésticas y su posible reutilización en la agricultura. Sin embargo, cabe mencionar que las aguas residuales en la granja Ceasip provienen también de otras actividades. Para el concepto de sostenibilidad de este proyecto, son prioritarios los criterios de prevención de la contaminación del agua subterránea, la reducción del consumo de agua y el reciclaje de nutrientes. La metodología de estudio consistió en varias etapas. Después de una extensa revisión de la literatura existente diferentes opciones de gestión fueron evaluadas de acuerdo con los criterios de sostenibilidad antes mencionados. Para hacer una elección de un tratamiento adecuado, se realizaron compilaciones y procesamiento de datos con respecto a los flujos y la calidad de aguas, las condiciones geomorfológicas, climáticas así como la evaluación de algunos parámetros ambientales, sociales, técnicos, económicos, y de salubridad. En las condiciones actuales, los resultados de las evaluaciones de la granja, resaltaron aspectos críticos sobre los que se propusieron algunos tratamientos alternativos; por ejemplo el aumento en el reciclaje de nutrientes así como la reducción de los niveles de nitrógeno en las aguas residuales. La separación de la orina se consideró de gran importancia para la gestión apropiada de las aguas residuales de Ceasip. Al final se sugirieron dos posibles alternativas para el diseño del tratamiento de aguas, la utilización de lagunas o de lechos filtrantes con arena, cuya contribuiría positivamente tanto como para el entorno local y el personal de la granja así como para la comunidad en general, sirviendo como ejemplo para otros establecimientos.
Hållbar sanitet och avloppsvattenhantering är av ökande vikt runt om i världen. Resurser blir allt knappare och mer värdefulla medan bristen på hållbar hantering även skapar problem och degradering av återstående resurser. På grund av den ökande urbaniseringen är grundvattnet i städernas periferier speciellt utsatt eftersom avloppsvattenhantering saknas där. Syftet med denna studie är att designa en mer hållbar avloppsvattenhantering för gården Ceasip i peri-urbana Santa Cruz de la Sierra, Bolivia. I nuläget saknas en lämplig lösning på gården. Av de olika typerna av avloppsvatten på gården, fokuserar denna studie främst på avloppsvattnet från hushåll och möjligheterna att återanvända det inom jordbruket. För hållbarhetskonceptet i uppsatsen, prioriteras följande kriterier: skydd av grundvattnet, minskning av grundvattenkonsumtion och näringsåtervinning. En litteraturstudie gjordes över olika avloppsvattenhanteringsalternativ som sedan utvärderades enligt hållbarhetskriterierna. För att bestämma det mest lämpliga hanteringsalternativet, samlades data och information om vattenflöden, vattenkvalitéer, klimat, geomorfologi och även för miljö, teknik, hälsa, ekonomi och kultur. Resultaten från sammanställningen visade på olika egenskaper från vilka lämplig hantering bestämdes. För att öka återvinningen av näringsämnen och minska kvävekoncentrationerna i avloppsvattnet, visade det sig vara lämpligt att använda urinsortering. Två behandlingsalternativ designades, och det föreslogs antingen behandlingsdammar eller förstärkta infiltrationsanläggningar. Då någon av dessa alternativ tillämpas på Ceasip skulle man även kunna påverka lokalt och regionalt genom att sätta ett bra exempel.

APA, Harvard, Vancouver, ISO, and other styles

50

Yee, Lai-wan, and 余麗容. "The efficiency of the charging system for industrial wastewater management in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B30101062.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Wastewater management'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles