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A New Tool for Measuring Biosolids Floc Strength
ISBN: 9781843397137 / Angielski / Miękka / 94 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The ability to measure sludge network strength is important in sludge dewatering applications because it can be used to determine optimum polymer dose for conditioning to achieve good dewaterability. This was demonstrated in laboratory and in full-scale dewatering and thickening. The network strength increased as the polymer dose was increased, however, at the optimum dose a "drop" in the network strength occurred. Further research is needed to verify this concept at full scale and to provide a robust technology to the water and wastewater treatment industry. A second phase is sought through...
The ability to measure sludge network strength is important in sludge dewatering applications because it can be used to determine optimum polymer dose...
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cena:
644,07 zł |
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Sensor Technology for Water Quality Monitoring: Bioluminescent Microorganisms
ISBN: 9781843397144 / Angielski / Miękka / 76 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Biological wastewater treatment plants can be adversely affected by influent toxicity. The effects can range from poor clarifier biomass settling and elevated effluent BOD and ammonia levels to total plant kills. These problems could be minimized or eliminated if an effective method existed for continuously monitoring biological wastewater treatment plant influent for toxicity to the treatment plant microorganisms. Current influent screening methods have not been proven to be adequate for adaptation to continuous screening in the field. The primary reasons include the batch-wise nature of the...
Biological wastewater treatment plants can be adversely affected by influent toxicity. The effects can range from poor clarifier biomass settling and ...
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cena:
644,07 zł |
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Post-Project Monitoring of BMP's/SUDS to Determine Performance and Whole-Life Costs
ISBN: 9781843397168 / Angielski / Miękka / 302 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Over the past 20 years, the use of Best Management Practices (BMPs) in the United States has been instrumental in reducing both the detrimental impacts to receiving water quality and the exacerbated flooding caused by urbanization and storm water drainage. More recently, Sustainable Urban Drainage Systems (SUDS) have started to be used in the United Kingdom. Both SUDS and BMPs attempt to mimic the drainage patterns of the natural watershed, and can also provide a degree of treatment needed to improve the quality of the water discharged to an acceptable level. The costs of conventional...
Over the past 20 years, the use of Best Management Practices (BMPs) in the United States has been instrumental in reducing both the detrimental impact...
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cena:
644,07 zł |
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Cryptosporidium Removal, Occurrence, and Inactivation Methods for Wastewater
ISBN: 9781843397182 / Angielski / Miękka / 142 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Treatment of drinking water was once considered sufficient for reducing the risk of infection from pathogenic organisms. However, as our knowledge of established and emerging pathogens in water has expanded, so has the need to examine their occurrence, distribution, risk to humans, and control through treatment. The increased need for wastewater reuse has resulted in attention now being focused on wastewater treatment processes and their ability to reduce the numbers of pathogenic organisms to acceptable levels. A public health concern with wastewater is the potential for transmission of...
Treatment of drinking water was once considered sufficient for reducing the risk of infection from pathogenic organisms. However, as our knowledge of ...
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cena:
644,07 zł |
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Multiple Stressors: Literature Review and Gap Analysis
ISBN: 9781843397199 / Angielski / Miękka / 142 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. There is a pressing need for developing and testing a general set of theories in order to provide a confident basis for prediction of multiple stressor effects. Confident prediction is central to confident decision making in water pollution control. Consequently, WERF commissioned this study, which has as its goal to provide a study design based on good science that helps establish a general, conceptual approach to multiple stressors. The objectives addressed in this report are: (1) review and critique the existing body of knowledge for multiple stressors; (2) develop a searchable, annotated...
There is a pressing need for developing and testing a general set of theories in order to provide a confident basis for prediction of multiple stresso...
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cena:
644,07 zł |
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Decision Support Systems for Wastewater Facilities Management
ISBN: 9781843397205 / Angielski / Miękka / 66 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Municipalities not only have a need for purely transactional systems (accounting, personnel, billing, etc.), but they also need to integrate the sophisticated analytical tools that are used to address the scientific or engineering issues that are very important for the performance of wastewater utility. Most commercially available systems are structured to function within the transactional paradigm and may be inadequate for full range of business processes encountered in a wastewater utility. Wastewater utilities are overwhelmed with data, yet often, managers do not have enough information to...
Municipalities not only have a need for purely transactional systems (accounting, personnel, billing, etc.), but they also need to integrate the sophi...
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cena:
644,07 zł |
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Sensor Technology for Water Quality Monitoring
ISBN: 9781843397250 / Angielski / Miękka / 62 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The main objective of this project is to demonstrate that the technology of on line monitoring of waterborne metals by X-ray Fluorescence (XRF) at part per billion (ppb) and sub-ppb levels, which has been successfully applied in the power industry for several years, can be applied to water and wastewater treatment plants. A specially designed on line XRF monitor was assembled, tested in the laboratory, and used at the City of Alliance, Ohio Wastewater and Water Treatment Plants from July 2002 until March 2004. At various times through this project, the metals monitored included iron, copper,...
The main objective of this project is to demonstrate that the technology of on line monitoring of waterborne metals by X-ray Fluorescence (XRF) at par...
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cena:
644,07 zł |
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Understanding Factors Affecting Polymer Demand for Thickening and Dewatering
ISBN: 9781843397267 / Angielski / Miękka / 112 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Polymer demand varies considerably for different digestion processes as well as the same digestion processes at different locations and the reasons for these differences are not known. The objectives of this research were to develop a mechanistic understanding for these differences. The differences were hypothesized to depend on both the amount of charge in a sludge sample and the characteristics of the polymer. The first phase of the research was aimed at establishing the component of the sludge that creates the polymer demand and the second phase was aimed at understanding the interactions...
Polymer demand varies considerably for different digestion processes as well as the same digestion processes at different locations and the reasons fo...
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cena:
644,07 zł |
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Application of DNA Microarray Technology for Wastewater Analysis
ISBN: 9781843397274 / Angielski / Miękka / 102 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Deoxyribonucleic acid (DNA) microarrays are widely used for differential expression studies and for detection of virulence genes in pure bacterial cultures. Their use in complex microbial samples, such as soil and wastewater, has been relatively less studied. This report presents the results of a systematic effort to apply DNA microarrays to pathogen detection and to bacterial source tracking (BST) in wastewater. Parameters such as the method of DNA extraction from the samples, the type of immobilized probe (whether polymerase chain reaction [PCR] amplicons or oligonucleotides), the length...
Deoxyribonucleic acid (DNA) microarrays are widely used for differential expression studies and for detection of virulence genes in pure bacterial cul...
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cena:
644,07 zł |
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Feasibility, Design Criteria, and O&M Requirements for Small Scale Constructed Wetland Wastewater Treatment Systems
ISBN: 9781843397281 / Angielski / Miękka / 304 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The expanding use of decentralized wastewater management has resulted in an increased interest in small-scale wetland treatment systems. However, there is limited information available on the use, distribution of and performance of these small-scale systems. The purpose of this study was to address this knowledge gap by developing criteria for the feasibility, design, operation, and maintenance of small-scale wetland treatment systems. Monitoring data from the assembled small-scale wetland database was used to develop sizing criteria for FWS and VSB wetlands. Loading rates and corresponding...
The expanding use of decentralized wastewater management has resulted in an increased interest in small-scale wetland treatment systems. However, ther...
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cena:
644,07 zł |
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Reduction of Pathogens, Indicator Bacteria, and Alternative Indicators by Wastewater Treatment and Reclamation Processes
ISBN: 9781843397304 / Angielski / Miękka / 90 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. In wastewater reclamation systems, microbiological monitoring is conducted to ensure that the users of reclaimed water are exposed to minimal risks from exposure to pathogens. Typically, utilities rely on the use of process controls to remove or inactivate pathogens. Routine monitoring of indicator organisms is conducted to evaluate overall process performance and for regulatory compliance. However, the effectiveness of individual treatment processes for removal of pathogens is dependent on process variables. This project was conducted to compare the effectiveness of biological treatment,...
In wastewater reclamation systems, microbiological monitoring is conducted to ensure that the users of reclaimed water are exposed to minimal risks fr...
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cena:
644,07 zł |
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Developing and Implementing a Performance Measurement System for a Water/Wastewater Utility
ISBN: 9781843397328 / Angielski / Miękka / 138 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The primary purpose of this research was to provide methods and tools that enable a water/ wastewater utility to develop and implement a performance measurement system based on a demonstrated proven approach. To achieve the purpose, the research was conducted in three phases: Core research on existing and applicable frameworks for performance measurement with experience from utilities and other government organizations, as well as outside business and industry, on leading practices in performance measurement. Steps to develop and implement performance measurement that uniquely fit...
The primary purpose of this research was to provide methods and tools that enable a water/ wastewater utility to develop and implement a performance m...
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cena:
644,07 zł |
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Nutrient Farming and Traditional Removal
ISBN: 9781843397335 / Angielski / Miękka / 58 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The purpose of this study was to assess the economic feasibility of using large-scale, restored wetlands to assist publicly owned treatment works (POTWs) in meeting the U.S. Environmental Protection Agency's (USEPA) recommended criteria for nutrients, specifically, total nitrogen (2.18 mg/l) and total phosphorous (0.076 mg/l). The assessment compares the cost of nutrient control by advanced wastewater treatment technology to that of wetland treatment technology. The comparison was based on several economic factors: annual operating costs, average costs, marginal costs, and present value. To...
The purpose of this study was to assess the economic feasibility of using large-scale, restored wetlands to assist publicly owned treatment works (POT...
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cena:
644,07 zł |
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Molecular Alternatives to Indicator and Pathogen Detection
ISBN: 9781843397359 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Microbial quality of water is a prime public health concern in today's world. To protect public health, the World Health Organization and the U.S. Environmental Protection Agency have established microbial pollution indicator standards and recommended routine monitoring of water for both total and fecal coliforms. However, the adequacy of current water quality standards to indicate the presence or absence of human pathogens is still questionable. For example, human viruses are more resistant to sewage treatment processes and environmental conditions than bacterial indicators and therefore may...
Microbial quality of water is a prime public health concern in today's world. To protect public health, the World Health Organization and the U.S. Env...
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cena:
644,07 zł |
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Innovative DNA Array Technology Detection of Pharmaceuticals Reclaimed Water
ISBN: 9781843397373 / Angielski / Miękka / 102 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Numerous pharmaceutical substances and their metabolites have been identified in the aquatic environment. Due to their unique environmental fate and lack of appropriate biomonitoring techniques, the potential risk of these compounds to public and environmental health has largely been undetermined. Recent interest in quantifying pharmaceuticals in waste effluents and aquatic environments has identified the need to develop bioanalytical assays that will accurately reflect presence of these compounds.
The goal of this research was to investigate the use of DNA microarrays as a bioanalytical... Numerous pharmaceutical substances and their metabolites have been identified in the aquatic environment. Due to their unique environmental fate and l...
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cena:
644,07 zł |
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Technical Brief: Endocrine Disrupting Chemicals and Implications for Wastewater Treatment
ISBN: 9781843397397 / Angielski / Miękka / 44 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This Technical Brief summarizes the information that is currently available from scientific research on Endocrine Disrupting Compounds (EDCs), sometimes known as hormonally active agents. It was prepared in response to concerns over the potential for EDCs to enter the environment in treated wastewater and reuse of biosolids. This document provides a primer on the endocrine system, the nature and sources of EDCs, and their potential effects on human health and the environment. The potential for man-made chemicals to cause endocrine disrupting effects came to light as early as the 1960s. The...
This Technical Brief summarizes the information that is currently available from scientific research on Endocrine Disrupting Compounds (EDCs), sometim...
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cena:
644,07 zł |
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Factors Influencing the Reliability of Enhanced Biological Phosphorus Removal
ISBN: 9781843397403 / Angielski / Miękka / 431 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Enhanced biological phosphorus removal (EBPR) has been used for decades to remove phosphorus from municipal wastewater because it allows facilities to meet water quality goals while minimizing chemical consumption and sludge production. However, there is still substantial variability in both the practices applied to achieve EBPR and the level of soluble phosphorus removal achieved. The objective of this research project was to develop information that can be used to help municipal wastewater treatment plants more efficiently and cost effectively remove phosphorus through EBPR processes. This...
Enhanced biological phosphorus removal (EBPR) has been used for decades to remove phosphorus from municipal wastewater because it allows facilities to...
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cena:
644,07 zł |
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Strategies for Sustainable Water Resource Management
ISBN: 9781843397564 / Angielski / Miękka / 294 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Integrated water resource management has been discussed since at least the Civil War; yet, there is still no integrated framework for sustainably managing water. Recognizing this need, the Water Environment Research Foundation (WERF) funded a research project to develop an integrated, conceptual framework for sustainable water resources management. Through WERF funding, this framework was developed over the past four years. Development of the framework was guided by the U.N. Agenda 21, Global Water Partnership, the Enlibra Principles, and Panarchy Theory. The conceptual framework for...
Integrated water resource management has been discussed since at least the Civil War; yet, there is still no integrated framework for sustainably mana...
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cena:
644,07 zł |
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Membrane Bioreactors for Anaerobic Treatment of Wastewaters (Phase II)
ISBN: 9781843397601 / Angielski / Miękka / 106 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Anaerobic biological treatment systems can offer a number of advantages over their aerobic counterparts. The operational costs associated with anaerobic systems are typically lower than with aerobic systems, and anaerobic systems also generate less waste sludge. In addition, the energy associated with the biogas produced during anaerobic biological treatment can potentially be recovered. However, to date, the use of conventional anaerobic biological systems for the treatment of dilute wastewaters has been relatively limited. The present study was designed to address this current knowledge...
Anaerobic biological treatment systems can offer a number of advantages over their aerobic counterparts. The operational costs associated with anaerob...
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cena:
644,07 zł |
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Case Studies of Modified Treatment Practices for Disinfection By-product Control
ISBN: 9781843398547 / Angielski / Miękka / 414 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Utilities must decide whether to modify their existing treatment practices to achieve compliance with the D/DBP regulations. A regulatory impact analysis predicted that up to 70% of large surface-water systems would need to make some treatment modifications. Meeting multiple water-quality objectives plays an important role in the decision-making process of water utilities. Utilities must meet other regulatory requirements and secondary drinking-water standards. In addition, there are operational, financial, and engineering issues that affect the selection of treatment technologies. Because of...
Utilities must decide whether to modify their existing treatment practices to achieve compliance with the D/DBP regulations. A regulatory impact analy...
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cena:
753,33 zł |
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