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Content DescriptionBiological treatment of drinking water has been used since the early 1800s through operation of carbon filters and slow sand filtration without an oxidant residual. As the industry gained a greater understanding of the role of biological instability in managing distribution system water quality, significant work began in the 1980s to optimize biological treatment design and operation. Since that time, the application of biological treatment has expanded with the promulgation of new regulations, such as the Stage I and II Disinfectants and Disinfection Byproducts Rule in the United States, greater industry acceptance of biological treatment in drinking water with the publication of additional guidance and case studies, and the need for more robust treatment processes to treat both emerging contaminants and alternative water supplies. Biological treatment processes may occur under either aerobic or anoxic conditions. In aerobic biological treatment, the microorganisms require oxygen to create energy and oxidize contaminants, such as natural organic carbon, dissolved iron and manganese, and ammonia. In contrast, anoxic biological treatment involves microorganisms that mediate electron transfer from an electron donor (e.g., acetic acid) to an electron acceptor (e.g., nitrate) and utilize the energy generated during the process for growth. Anoxic treatment is used to treat contaminants, such as nitrate and perchlorate. In the last couple decades, many project reports, guidebooks, and manuals have been published on individual applications of biological treatment, such as biofiltration. This first edition of AWWA Manual M80, Biological Drinking Water Treatment for Surface Water, Groundwater, and Reuse Applications, is the first guidance document covering all common biological treatment processes in practice today, as shown in the figure below. This manual begins with an introductory chapter presenting an overview of biological treatment applications, processes, history, and key terminology. The subsequent chapters each focus on one of the four common applications of biological treatment.Subscription InformationMADCAD.com AWWA Standards & Manuals subscriptions are annual and access is concurrency based (number of people that can access the subscription at any given time).
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About AWWAEstablished in 1881, the American Water Works Association is the oldest and largest nonprofit, scientific and educational organization dedicated to safe and sustainable water in the world. With more than 50,000 members worldwide and 43 Sections in North America, AWWA advances public health, safety and welfare by uniting the efforts of the entire water community. AWWA Offers education to water professionals Advocates for safe and sustainable water Collects and share knowledge Creates volunteering opportunities |
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