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 36
Pagina 96
... ions ( OH ) and bicarbonate ions ( HCO3 ) . Bicarbonate ions are produced when carbon dioxide dissolves in the wastewater to form carbonic acid ( H2CO3 ) , which dissociates to form bicarbonate ions . Approximately 50 % of the ...
... ions ( OH ) and bicarbonate ions ( HCO3 ) . Bicarbonate ions are produced when carbon dioxide dissolves in the wastewater to form carbonic acid ( H2CO3 ) , which dissociates to form bicarbonate ions . Approximately 50 % of the ...
Pagina 174
... ions do not contain carbon ( C ) and hydrogen ( H ) and may be placed into two broad categories . The first category contains the highly toxic compounds and ions such as arsenic ( As ) , chromates , chromium ( Cr ) , cyanide , and zinc ...
... ions do not contain carbon ( C ) and hydrogen ( H ) and may be placed into two broad categories . The first category contains the highly toxic compounds and ions such as arsenic ( As ) , chromates , chromium ( Cr ) , cyanide , and zinc ...
Pagina 188
... ions in solution . Conductivity is influenced by the ions present ( Table 19.17 ) , their concentrations , their mobility , their charge or valence , and the temper- ature of the solution . Aqueous solutions of most inorganic compounds ...
... ions in solution . Conductivity is influenced by the ions present ( Table 19.17 ) , their concentrations , their mobility , their charge or valence , and the temper- ature of the solution . Aqueous solutions of most inorganic compounds ...
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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