Download or read book The organization and administration of municipal public works departments in Texas written by Edmund Peter Segner and published by . This book was released on 1952 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Works Administration written by Lucy Brewer and published by SAGE Publications, Incorporated. This book was released on 1997 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical structures and facilities that deliver the federal, state, and local governments' services are essential to the economic and social development of communities, regions, and nations. As our cities age and our government "recreates" itself, can our transportation, water resources, waste management, and public utilities systems absorb the strain? Gathered from experience and applied research, Public Works Administration is a collection of modern perspectives on public works administration. Contributors examine public works such as federal reservoirs, urban forestry, solid waste disposal, and urban highways and also explore the concepts of privatization, growth management, site location, and funding.
Download or read book Municipal Journal and Public Works written by and published by . This book was released on 1914 with total page 1262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management and Operation of the Street Division Public Works Department City of Fort Worth Texas written by Public Administration Service, Chicago and published by . This book was released on 1962 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Geological Survey Yearbook written by and published by . This book was released on 1993 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Geological Survey Yearbook written by Geological Survey (U.S.) and published by . This book was released on 1988 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Municipal Public Works Organizations written by American Public Works Association and published by . This book was released on 1955 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Animal Control Management written by Stephen Aronson and published by Purdue University Press. This book was released on 2010 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first of its kind to discuss in detail the actual management of local animal control programs as opposed to the care of the animals. It covers financial, personnel, legal, health, and safety issues that animal control directors and management staff need to know in providing direction and oversight of animal control programs. Chapters examine selected topics in which the author assesses strengths and weaknesses and offers new insights and strategies for more effective management. For example, the two chapters on contracting discuss the steps in the process, strategies, and suggested provisions in the written agreement to make the program more effective. The animal law chapters explain the basis for the laws, and highlight those provisions, that if enacted into law, can strengthen enforcement options. In addition, the author discusses and assesses interacting with the public and the media, liability issues, wildlife problems, and the politics of animal control.
Download or read book Municipal Public Works written by Samuel Whinery and published by New York : Macmillan Company ; London : Macmillan. This book was released on 1903 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Clean Water Act written by United States. Congress. Senate. Committee on Environment and Public Works and published by . This book was released on 1996 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Y2K H20 written by United States. Congress. Senate. Special Committee on the Year 2000 Technology Problem and published by . This book was released on 1999 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiple Stressors written by S. M. Swanson and published by IWA Publishing. This book was released on 2004-07-31 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 and stream ecosystems; develop a study design to test the conceptual model of multiple stressor effects; and, document the process used to arrive at the conceptual model. The multiple stressor conceptual model includes two main components: (1) a diagram that portrays the main features of the study team's understanding of how multiple stressors would interact and the nature of the effects; and (2) a series of three testable risk hypotheses. These two components follow the guidance provided by the U.S. EPA for ecological risk assessment. The proposed conceptual model encompasses the following key assumptions: interactions between the stressor and the ecosystem are dependant upon the existing baseline conditions; for each stressor/baseline combination there will theoretically be a functional and a structural response; effects on habitat are caused by structural or functional responses to stressors; and effects on habitat can cause structural or functional responses.
Download or read book Reduction of Pathogens Indicator Bacteria and Alternative Indicators by Wastewater Treatment and Reclamation Processes written by Joan B. Rose and published by IWA Publishing. This book was released on 2005-04-30 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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, filtration, and disinfection for removal of bacterial and viral indicators, enteric viruses, and protozoan pathogens. Six full-scale treatment facilities were each sampled a minimum of four times over a one year period. The relative impacts of loading conditions, process design, and operating parameters on the removal/inactivation of a suite of nine microbial species (bacteria, coliphages, enteric viruses, and protozoan pathogens) was evaluated. Bacterial removal was consistent for all types of biological systems, however, increased virus removal was associated with biological nutrient removal and nitrification processes. Parasite removal was highly variable. The effectiveness of filtration was impacted most by the use of upstream chemicals (either chlorine or coagulant chemicals). Chlorine disinfection was more effective in cases where ammonia levels were low (biological nutrient removal or nitrification facilities). Infectivity assays for protozoan pathogens suggest that the proportion of infective cysts or oocysts increases with increasing level of treatment.
Download or read book Fate and Persistence of Pathogens Subjected to Disinfection written by Karl G. Linden and published by IWA Publishing. This book was released on 2004-01-01 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 for optimizing the treatment of pathogens in wastewater. It is also recognized that water quality may impact disinfection effectiveness, such as protection of pathogen by particles and disinfectant demand. This study investigated bacteria, viruses and protozoan pathogens. All species of bacteria tested were susceptible to both UV and chlorine, despite differences in antibiotic resistance and tendency to aggregate. Upon exposure to disinfection conditions that could indicate viability of the bacteria tested, but not culturability using common methods, it was found that UV and chlorine were effective in eliminating the capability of viable but non-culturable bacteria to resuscitate and become re-infective. Clostridium spores were resistant to free chlorine and UV disinfection but found to be susceptible to long exposure to monochloramine. Cryptosporidium was resistant to all chlorine forms but very susceptible to UV irradiation. Pathogenic and indicator viruses tested were very susceptible to free chlorine and UV disinfection. UV radiation throughout the 200 to 300 nm range was effective for inactivation of viruses and C. parvum, but wavelengths between 260-270 nm and below 220 nm appeared to be more effective for viruses, suggesting a possible advantage for polychromatic UV sources. Sequential disinfection strategies were proposed and tested to enhance inactivation of various microorganisms. One scenario integrated UV disinfection followed by dynamic chloramination through addition of free chlorine and subsequent transformation to combined chlorine. Further, disinfection of microorganisms in wastewater presents challenges that are inherent to the water matrix, such as pathogens associated with particles. UV and chlorine were both effective for disinfection of coliform in wastewater but chlorine was found to be more effective during long contact times for inactivation of particle associated coliform. In addition to coliform, both Cryptosporidium parvum and Salmonella typhimurium were identified as being particle associated in wastewater using molecular approaches developed to detect microbes in environmental samples
Download or read book Producing Class A Biosolids With Low Cost Low Technology Treatment Processes written by J. B. Farrell and published by IWA Publishing. This book was released on 2004-08-31 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Class A biosolids can be produced using low-cost, low-technology biosolids treatment processes including lagoon storage, air drying, and cake storage. This project reviewed the available literature and municipal agency data about these processes. This report presents design and operating guidelines distilled from the review process. It is designed for wastewater treatment plant (WWTP) managers, operators, and engineers who wish to discern whether these processes, used alone or in combination, might be practically applied at specific plants. This report also describes the U.S. regulatory environment in relation to producing Class A Biosolids and defining Class A processes. It also presents a list of recommended research needs. This report: Familiarizes WWTP managers, operators, and engineers with low-cost, low-technology biosolids treatment processes, likely pathogen kill mechanisms, and practices that have reduced pathogen densities to Class A levels at scales ranging from laboratory tests to large municipal biosolids treatment operations. Presents guidelines for producing Class A biosolids under a variety of conditions. Describes low-technology treatment processes within the Class A regulatory framework, identifies satisfactory end conditions for products created from low-tech treatment processes, and provides guidance in developing national or site-specific certification as processes equivalent to a process to further reduce pathogens (PFRP).
Download or read book Assessing Methods of Removing Metals from Wastewater The Effect of Ferric Chloride Addition written by David L. Sedlak and published by IWA Publishing. This book was released on 2005-01-01 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The presence of cationic pollutant metals in municipal wastewater effluent is a concern because stringent discharge requirements cannot always be met with conventional treatment methods. Attempts to improve metal removal are often unsuccessful because a significant fraction of the cationic metals are complexed by the synthetic chelating agent ethylenediamine tetraacetic acid (EDTA). To identify practical approaches for improving metal removal, an analytical method for measuring metal-EDTA complexes was used to survey metal speciation at a series of wastewater treatment plants. Following these analyses, bench-scale experiments were conducted. The survey data indicated that pollutant metal-EDTA complexes account for a significant fraction of the dissolved metals in wastewater. The bench-scale studies indicated that ferric chloride addition improves the removal of copper and zinc by approximately 20%. To test the results of the bench-scale experiments, a full-scale experiment was conducted by interrupting chemical addition at a municipal wastewater treatment plant that normally adds ferric chloride during primary treatment. Results indicated that ferric chloride addition had a slight impact on metal speciation but no effect on metals removal. The lack of an effect was attributed to changes in metal speciation that occurred during primary treatment irrespective of ferric chloride addition.
Download or read book Clean Water Infrastructure and Wet Weather Flows Legislation written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment and published by . This book was released on 2000 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
