Example 3: Waste Water Treatment Technology Screening Sedimentation Sludge (insoluble) Soluble liquid Activated Anoxic digestion Oxidation Trickling filter Digested sludge Disinfection drying incineration Treated effluent to stream Key: Raw Biological Nonbiologic Sewage processes processes
Example 3: Waste Water Treatment Technology
Anoxic sludge digestor(only the top of the tank s shown, the remainder is underground Gas outlet CHa/CO2 Sludge Scum laver Scum removal inlet Supernatant Supernatant removal Actively digesting sludge Stabilized sludge Inner working of a sludge digestor (b) Sludge outlet
Anoxic sludge digestor (only the top of the tank is shown, the remainder is underground. Inner working of a sludge digestor
Complex polymers (polysacchanides, lipids, proteins) Major microbial processes Hydrolysis by occurring during sludge microbial enzymes digestion Monomers (sugars, fatty acids, amino acids) Fermentation Fermentation Acetate 2+ co Methanogenesis CHa+ cO2 CH (c)
Major microbial processes occurring during sludge digestion
Aerobic sewage treatment processes: trickling filter/k
Aerobic sewage treatment processes: trickling filter
Aeration tank of an activated sludge installation in a metropolitan sewage treatment plant b
Aeration tank of an activated sludge installation in a metropolitan sewage treatment plant