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. |
Dall'interno del libro
Risultati 1-3 di 48
Pagina 30
... presence of free molecular oxygen . Oxygen tolerant anaerobes may or may not be active in the presence of free molecular oxygen . Obligate anaerobes such as the methane- forming bacteria die in the presence of free molecular oxygen ...
... presence of free molecular oxygen . Oxygen tolerant anaerobes may or may not be active in the presence of free molecular oxygen . Obligate anaerobes such as the methane- forming bacteria die in the presence of free molecular oxygen ...
Pagina 91
... presence of an abundant and active population of facultative anaerobic bacteria or denitrifying bacteria • The presence of nitrate or nitrite • The absence of free molecular oxygen ( O2 ) or the presence of an oxygen gra- dient ( Figure ...
... presence of an abundant and active population of facultative anaerobic bacteria or denitrifying bacteria • The presence of nitrate or nitrite • The absence of free molecular oxygen ( O2 ) or the presence of an oxygen gra- dient ( Figure ...
Pagina 125
... presence of specific sulfur bac- teria . Operational concerns related to the activity of SRB include malodor production , undesired growth of the filamentous organisms Beggiatoa , Thiothrix , and type 021N , and competition with methane ...
... presence of specific sulfur bac- teria . Operational concerns related to the activity of SRB include malodor production , undesired growth of the filamentous organisms Beggiatoa , Thiothrix , and type 021N , and competition with methane ...
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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