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Use of Novel Techniques to Quantify Phenotypes in Biological Treatment Process
ISBN: 9781843396970 / Angielski / Miękka / 207 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This research attempts to evaluate nitrification treatment performance in combined carbon/nitrogen municipal wastewater reactors using traditional physical/chemical methods and modern molecular techniques. Bench scale activated sludge reactors were operated at different SRTs under varying DO levels and temperatures over a 21-month period. Real-time PCR assays were used to determine cell concentrations of total bacterial 16S rDNA, a gross measure of biomass content, the amoA gene, a measure of ammonia-oxidizing bacteria (AOB), and the Nitrospira 16S rDNA gene, a measure of nitrite-oxidizing...
This research attempts to evaluate nitrification treatment performance in combined carbon/nitrogen municipal wastewater reactors using traditional phy...
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cena:
684,90 zł |
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Fate and Persistence of Pathogens Subjected to Disinfection
ISBN: 9781843396994 / Angielski / Miękka / 124 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Disinfection of wastewater is a necessary treatment process for protecting the public from potential exposure to pathogenic microorganisms because many wastewater effluents are discharged into water bodies that may be used for recreation or as future drinking water supplies. Two common forms of disinfection are chlorine and ultraviolet (UV) light. However, microorganisms differ in their susceptibility to UV and chlorine disinfectants. It is necessary to understand how different classes of pathogens respond to UV and chlorine disinfection processes in wastewater to better develop strategies...
Disinfection of wastewater is a necessary treatment process for protecting the public from potential exposure to pathogenic microorganisms because man...
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cena:
684,90 zł |
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Evaluating and Optimizing Source Treatment Technologies to Improve the Biodegradability of Organic Compounds
ISBN: 9781843397021 / Angielski / Miękka / 189 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The main objective of this research was to investigate the capabilities of three chemical oxidation processes as pretreatment technologies with the goal of making wastewaters containing persistent organic compounds amenable to biotreatment. The processes investigated are ozonation, ultraviolet radiation/ hydrogen peroxide (UV/H2O2) and Fenton reaction. The studies were focused on two organic compounds: Dichloro diethyl ether (DCDE) and methyl tertiary butyl ether (MTBE). Synthetic solutions, and a real groundwater and an industrial wastewater were used for experimentation. The experimental...
The main objective of this research was to investigate the capabilities of three chemical oxidation processes as pretreatment technologies with the go...
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cena:
684,90 zł |
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Evaluation of Feasibility of Methods to Minimize Biomass Production from Biotreatment
ISBN: 9781843397038 / Angielski / Miękka / 265 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This report presents the results of an evaluation of technologies that may result in less biomass production in activated sludge processes. The report summarizes the results of a comprehensive literature review that was done to evaluate technologies in terms of their sludge reduction potential, ease of implementation, impacts on plant operations and effluent quality, reliability, and relative capital and operating costs. Reporting testing results supported significant biomass reduction by processes using chemical and thermal methods, higher life forms (predator processes), anaerobic instead...
This report presents the results of an evaluation of technologies that may result in less biomass production in activated sludge processes. The report...
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cena:
684,90 zł |
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Characterizing Mechanisms of Simultaneous Biological Nutrient Removal During Wastewater Treatment
ISBN: 9781843397052 / Angielski / Miękka / 102 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Simultaneous biological nutrient removal (SBNR) is the removal of nitrogen and/or phosphorus in excess of that required for biomass synthesis in biological wastewater treatment systems where there are no defined anaerobic and/or anoxic zones. The hypothesis is that one or more of three mechanisms is responsible within individual systems: variations in the bioreactor macroenvironment created by the mixing pattern, gradients within the floc microenvironment, and/or novel microorganism activity. Understanding of the mechanisms of SBNR can be expected to lead to improved efficiency and...
Simultaneous biological nutrient removal (SBNR) is the removal of nitrogen and/or phosphorus in excess of that required for biomass synthesis in biolo...
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cena:
684,90 zł |
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Multiple Stressors
ISBN: 9781843397076 / Angielski / Miękka / 145 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 of the study are to develop a flexible and scientifically defensible conceptual model of the environmental effects of multiple stressors on river...
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:
684,90 zł |
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Identifying and Controlling Odor in the Municipal Wastewater Environment, Health Effects of Biosolids Odors
ISBN: 9781843397083 / Angielski / Miękka / 60 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This report deals with whether the experience of odors, i.e., odors as sensations, from biosolids at wastewater treatment plants (WWTPs) causes illness. There exists no repository of information on the numbers of complainants with illness, their specific complaints, or the relationship between degree of exposure and complaints. Anecdotal reports nevertheless imply a pattern much like that associated with other industrial malodors. Any connection between odor and illness has received little note among the millions of articles in the medical literature. This state of affairs presumably exists...
This report deals with whether the experience of odors, i.e., odors as sensations, from biosolids at wastewater treatment plants (WWTPs) causes illnes...
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cena:
684,90 zł |
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Identifying and Communicating the Benefits and Risks of Disinfecting Wet Weather Flows
ISBN: 9781843397090 / Angielski / Miękka / 174 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The primary objective of this project was to identify and communicate the benefits and risks of disinfecting wet weather flows by evaluating available disinfection technologies and identifying disinfection by-products and their potential risks to aquatic and human life. A decision-making framework was developed that could be used as a model to guide combined sewer overflow (CSO), sanitary sewer overflow (SSO) and stormwater (SW) disinfection control policies. This project was implemented as a case study in collaboration with the Onondaga County Department of Water Environment Protection...
The primary objective of this project was to identify and communicate the benefits and risks of disinfecting wet weather flows by evaluating available...
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cena:
684,90 zł |
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Field Calibration and Verification of a Pathogen Transport Model
ISBN: 9781843397113 / Angielski / Miękka / 52 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Outbreaks of cryptosporidiosis throughout the world, especially the massive outbreak in Milwakee in 1993 drew public attention to the quality of drinking water supplies and to the efficiency of water treatment methods. Cryptosporidiosis is a severe gastrointestinal disease caused by the transmissive form of Cryptosporidium parvum protozoan and its oocysts. Digestion of as few as 30 oocysts may be fatal to infants, elderly and immunocompromized persons. C. parvum oocysts are ubiquitous in untreated water and extremely resistant to harsh environmental conditions including standard water...
Outbreaks of cryptosporidiosis throughout the world, especially the massive outbreak in Milwakee in 1993 drew public attention to the quality of drink...
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cena:
684,90 zł |
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Global Lessons for Watershed Management in the United States
ISBN: 9781843397120 / Angielski / Miękka / 292 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Water resource management in the United States is evolving in the face of continuing challenges to protect water quality, provide adequate quantities of water for competing uses, and protect habitat and other natural resources. In many jurisdictions and agencies this evolution is increasingly leading toward adoption of watershed management. This approach is characterized by planning and decision making on a watershed scale, integration of a variety of competing water resource priorities and goals, cooperation of multiple stakeholders and governmental agencies, and increased levels of public...
Water resource management in the United States is evolving in the face of continuing challenges to protect water quality, provide adequate quantities ...
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cena:
684,90 zł |
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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:
684,90 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:
684,90 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:
684,90 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:
684,90 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:
684,90 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:
684,90 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:
684,90 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:
684,90 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:
684,90 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:
684,90 zł |
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