Download or read book Central Contra Costa County Wastewater Management Program written by and published by . This book was released on 1976 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Central Contra Costa County Wastewater Management written by and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contra Costa County Wastewater Management written by and published by . This book was released on 1977 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Contra Costa County Wastewater Management Program written by West County Agency (San Pablo, Calif.) and published by . This book was released on 1976 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Contra Costa County Wastewater Management Program written by and published by . This book was released on 1977 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alternatives for Managing Wastewater in the San Francisco Bay and Sacramento San Joaquin Delta Area Appendix A Study area today and in the future Appendix B Development of alternatives written by United States. Army. Corps of Engineers. San Francisco District and published by . This book was released on 1971 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report.--v. 1. Appendix A. Study area today and in the future. Appendix B. Development of alternatives.--v. 2. Appendix C. Assessment of impacts of selected alternatives.--v. 3. Appendix D. Evaluation of selected alternatives. Appendix E. Bibliography.

Download or read book Wastewater Management Technical Alternatives written by and published by . This book was released on 1972 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book West Contra Costa County Wastewater Program written by and published by . This book was released on 1977 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Water Reuse Symposium March 25 30 1979 Washington D C written by and published by . This book was released on 1979 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book To Amend and Extend Authorizations for the Federal Water Pollution Control Act written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Water Resources and published by . This book was released on 1977 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alternatives for Managing Wastewater in the San Francisco Bay and Sacramento San Joaquin Delta Area written by and published by . This book was released on 1971 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Final Environmental Impact Statement written by and published by . This book was released on 1978 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Global Lessons for Watershed Management in the United States written by J. Goldstein and published by IWA Publishing. This book was released on 2004-09-30 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 participation. This report identifies the most promising watershed planning and management approaches from around the world; evaluates how they operate, their benefits and limitations; and assesses the degree to which these approaches could be successfully adapted to the U.S. context. Drawing on this international experience, the report is intended to inform policy makers and practitioners and to promote the implementation of integrated watershed management approaches that are most likely to succeed. This report: Provides a decision-making framework of watershed management efforts at all scales in the United States. Evaluates past U.S. watershed management experience and identifies key characteristics for success as well as major challenges and opportunities for improving the watershed approach. Summarizes and evaluates international case studies where innovative watershed management techniques have been used. Identifies ten key lessons for sustainable water management, including the role of water/wastewater utilities based on the experience of the international case study watersheds.

Download or read book Alternatives for Managing Wastewater in the San Francisco Bay and Sacramento San Joaquin Delta Area Appendix C Assessment of impacts of selected alternatives written by United States. Army. Corps of Engineers. San Francisco District and published by . This book was released on 1971 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report.--v. 1. Appendix A. Study area today and in the future. Appendix B. Development of alternatives.--v. 2. Appendix C. Assessment of impacts of selected alternatives.--v. 3. Appendix D. Evaluation of selected alternatives. Appendix E. Bibliography.

Download or read book Acclimation of Nitrifiers for Activated Sludge Treatment written by Robert A. Zimmerman and published by IWA Publishing. This book was released on 2004-06-30 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrification kinetics were evaluated in bench-scale batch reactors fed with a synthetic wastewater containing approximately 1,000 mg ammonia-nitrogen (NH3-N)/L operated at 5, 10, and 20 day solids retention times (SRTs) and with dewatered biosolids supernatant (1,126 to 1,680 mg NH3-N/L) operated at a 20-day SRT. For the 5- and 10-day SRTs, complete nitrification appeared to be inhibited by the presence of un-ionized ammonia and un-ionized nitrous acid. For the 20-day SRT, near complete nitrification was observed for both substrates. Observed ammonium oxidation rates decreased with increasing SRT. Observed yield coefficients were similar for all SRTs and substrates. Fully established steady-state conditions were observed at higher SRTs despite process start-up and operational considerations. Although it may be possible to culture a nitrifier population capable of near-complete nitrification at lower SRTs, the design configuration and operational strategy must mitigate the potential for un-ionized ammonia and un-ionized nitrous acid inhibition (e.g. process start-up at lower concentration with gradual increase to higher concentration, continuous feed operation, etc). Batch bioaugmentation analyses were conducted in the mixed liquor suspended solids and final clarifier effluent from a non-nitrifying activated sludge with seed nitrifiers developed from the 20-day SRT reactors and with biomass from a nitrifying trickling filter facility. Ammonia removal was observed in all bioaugmentation analyses with no apparent lag or acclimation period. Observed ammonium oxidation rates were not significantly different between the seed and batch bioaugmentation reactors. Acclimation does not appear to be a critical obstacle for nitrifier bioaugmentation when environmental conditions (e.g. temperature, pH, etc.) between the seed and bioaugmentation processes are not significantly different.

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).