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Groundwater Contamination from Stormwater Infiltration
Groundwater Contamination from Stormwater Infiltration examines topics such as urban runoff, constituents of concern, treatment, combined sewage characteristics, relative contributions of urban runoff flow phase, salts and dissolved minerals, treatment before discharge, outfall pretreatment, and local pretreatment.
Stormwater Runoff and Receiving Systems
The primary focus of stormwater and urban runoff research during the past twenty-five years has been on the physical description and the chemical quality assessment of runoff events and the design and implementation of the best management practices to control these events. There is a definite need for more effective integration of receiving system issues in the management and regulation of stormwater runoff. This book successfully brings together a diverse group of environmental specialists to address the issues surrounding the assessment, management, and control of stormwater, and more specifically urban runoff, from a receiving system perspective. The book's emphasis on the receiving syste...
Construction Site Erosion and Sediment Controls
Contains critical design tools for practical implementation of techniques to control and abate run-off and sediment from construction sites.
Politics of Urban Runoff
After describing the evolution of urban runoff practices, Karvonen analyzes the urban runoff activities in Austin and Seattle - two cities known for their highly contested public debates over runoff issues and exemplary stormwater management practices.
Cyanide Formation and Fate in Complex Effluents and its Relation to Water Quality Criteria
Cyanide occurs in many industrial and municipal wastewaters and is often an expected constituent of typical treatment plant wastewater streams. However, a growing number of wastewater treatment plants (WWTPs) across the USA have detected cyanide in cholorinated effluents at levels exceeding influent concentrations. Because water quality criteria and related discharge limits are typically low some of these WWTPs periodically exceed effluent cyanide standards. Potential causes include cyanide formation during wastewater cholrination processes, the presence of interferences that cause false negatives, and false positives caused by artifacts of sample handling or analytical techniques. The possible causes of the apparent cyanide formation phenomenon were investigated in this study. This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Methods for Wastewater Characterization in Activated Sludge Modelling
Mathematical modeling is a useful tool for the design, analysis and control of wastewater treatment systems. The activated sludge process is one of the most common processes used in wastewater treatment, and therefore is a particularly important candidate for the application of mathematical models. In the 1980s, a task group organized by the International Association on Water Quality (IAWQ) developed a conceptual model of the activated sludge process, which has become an industry-wide standard for the development of computer-based activated sludge models. A recent version of the IAWQ model incorporates 19 components, 17 processes, and numerous rate and stoichiometric coefficients. It is difficult and costly to quantify all of the necessary coefficients for any given application of the model; consequently, it is important to identify the most critical wastewater and biomass components and the relevant coefficients to be quantified for the most common uses of the model. It is also important to provide guidance to potential model users on the use of default and/or estimated values for the remaining parameters.
Evaluating Endocrine Disruption in Receiving Waters
In recent years, concerns have been raised that low concentrations of chemicals may alter the normal functions of the endocrine system, resulting in potentially significant adverse effects on growth, reproduction, and/or development. For domestic wastewater discharges to surface water bodies, estrogenic activity of effluents has been suggested by chemical analysis, biomarkers, and /or in vitro assays. Chemical Measurements. Using sensitive analytical techniques, natural or synthetic hormones and chemicals that mimic estrogen, have been detected in some domestic wastewater effluents and associated watersheds at low concentrations. Biomarkers. Several studies have demonstrated physiological ch...
