Wastewater BacteriaWiley, 14 apr 2006 - 272 pagine A practical guide to wastewater bacteria and the roles they perform in wastewater treatment Communicating material in a practical manner for operators and technicians who regulate and troubleshoot their wastewater treatment processes, Wastewater Bacteria discusses the effective control and proper operation of aerobic (activated sludge) and anaerobic (anaerobic digesters) biological treatment units to ensure that an adequate, active, and appropriate population of bacteria is present in each treatment unit. It is a hands-on guide to understanding the biology and biological conditions that occur at each treatment unit. Avoiding unnecessary technical jargon and chemical equations, Wastewater Bacteria, the fifth book in the Wastewater Microbiology Series, explores and explains: * Bacteria and the wastewater environment * Enzymes and sludge production * Nitrogen, phosphorus, and sulfur bacteria * Floc formation and filamentous organisms * Nitrification and denitrification * Sulfate reduction, fermentation, and methane production * Toxicity * Foam and malodor production The goal of Wastewater Bacteria is to enable plant operators to achieve the twofold basic objectives of wastewater treatment-to degrade organic wastes to a level where a significant, dissolved oxygen demand is not exerted upon receiving waters and to remove nutrients to levels where photosynthetic organisms in receiving waters are limited in their growth. This straightforward manual equips plant technicians to meet these objectives with essential information to understand the biological processes and organisms involved in wastewater treatment. |
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Pagina 17
... bacteria . The competitive advantages of the filamentous organisms to obtain nutrients when they are limited in quantity are twofold . First , the filamentous organisms have more surface area exposed to the bulk solution than floc bacteria ...
... bacteria . The competitive advantages of the filamentous organisms to obtain nutrients when they are limited in quantity are twofold . First , the filamentous organisms have more surface area exposed to the bulk solution than floc bacteria ...
Pagina 108
... filamentous organisms that proliferate in a nutrient - deficient condition for phosphorus or nitrogen ( Table 12.1 ) . These filamentous organisms outgrow floc bacteria in a nutrient deficient condition because ( 1 ) they require less ...
... filamentous organisms that proliferate in a nutrient - deficient condition for phosphorus or nitrogen ( Table 12.1 ) . These filamentous organisms outgrow floc bacteria in a nutrient deficient condition because ( 1 ) they require less ...
Pagina 139
... filamentous organisms . Because floc formation is initiated before filamentous organisms can increase in length and extend beyond the perimeter of the floc par- ticle , young floc particles have little or no filamentous organisms as ...
... filamentous organisms . Because floc formation is initiated before filamentous organisms can increase in length and extend beyond the perimeter of the floc par- ticle , young floc particles have little or no filamentous organisms as ...
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absorbed accumulation acetate activated sludge process addition aeration tank aerobic alkalinity amino acids anaerobic bacteria anaerobic digester anoxic approximately bacterial cells biological treatment unit carbon dioxide cellular chemical concentration contain decrease degradation denitrification discharge dissolved oxygen effect effluent energy enter enzymes Equation example fatty acids fermentative FIGURE filamentous bacteria filamentous organisms floc particles foam formation free molecular oxygen glucose groups growth heavy metals hydrogen hydrogen sulfide increase industrial influent inorganic ionized ammonia ions malodorous measures metals methane methane-forming bacteria Michael H molecules nitrate nitrification nitrifying bacteria nitrogen nutrients obtain occurs operational operational conditions organic compounds orthophosphate oxidation phosphorus presence primary production proteins quantity reduced relatively released removal secondary clarifier septage significant solids soluble cBOD solution structure substrate sulfate sulfide sulfur surfactants Table temperature toxic wastes undesired values volatile wastewater treatment plants