Activated sludge: theory and practice
Activated sludge is the most widely used biological wastewater treatment process in the world, both for domestic and industrial purposes. This book reviews the major theoretical concepts and practical operational factors, and describes the complexities inherent in the process, which depends on a dense microbial population mixed in wastewater under specific aerobic conditions. It is an ideal reference source for scientists, and a useful troubleshooting guide for practicing engineers and plant operators.
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Microbial theory and kinetics
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activated sludge plants activated sludge process activated sludge systems aeration system aeration tank aerobic anaerobic anoxic zone biological biomass BOD removal bubble cells cent chemical ciliates coagulation conventional activated sludge Curds denitrification diffusion dissolved oxygen concentration efficiency ensure Euplotes extended aeration filamentous filamentous micro-organisms filamentous organisms final effluent floc-forming flocculation flocs flow foam heterotrophic high-rate increase influent wastewater kg BOD liquid maximum micro-organisms microbial biomass mixed liquor MLSS concentration MLVSS nitrification nitrifying bacteria nitrogen Nitrosomonas Nocardia normally nutrient operation Opercularia organic loading oxidation ditches oxygen demand oxygen transfer parvicella percolating filters phase phosphorus plug-flow systems primary sedimentation problem protozoa ratio reaction reactor recycle reduced returned sludge rotifers rotor settlement settling sewage sludge age sludge flocs sludge loading Sludge return solids concentration specific growth rate SSVI substrate concentration Suctoria suspended solids Table temperature Tomlinson treatment plants Type Vorticella Vorticella convallaria