Transcription of SEWAGE TREATMENT – TECHNOLOGIES
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SEWAGE TREATMENT – TECHNOLOGIES
SEWAGE TREATMENT TECHNOLOGIESTECHNOLOGIEST ypes of contaminants in SewageTypes of contaminants in SewageORGANICINORGANIC Sugar MilkSuspendedDissolvedSuspendedDissolved Vegetable matter Food residue Plastic bags Cans Fiber clothes SaltBiological treatmentPrimary treatmentSl. NoContaminantSourceEnvironmental significance1 Suspended solidsDomestic use, industrial wastesCause sludge deposits and anaerobic condition in aquatic environmentImportant Waste Water Contaminantsin aquatic environment2 Biodegradable organicDomestic use , industrial wastesCause biological degradation3 PathogensDomestic waterTransmit communicable disease4nutrientsDomestic and industrial wasteCause eutrophication5 Refractory organicsIndustrial wasteCause taste and odour problemsPollutants in SEWAGE BOD(Bio Chemical Oxygen demand) COD(Chemical Oxygen demand) COD(Chemical Oxygen demand) TSS(Total Suspended Solids) PHBOD(Biochemical Oxygen demand)The BOD is an important measure of water quality.
Upflow Anaerobic Sludge Blanket Reactor (UASB) • The Up flow Anaerobic Sludge Blanket reactor (UASB) maintains a high concentration of biomass through formation of highly settleable microbial aggregates. The sewage flows upwards through a layer of sludge. • The sludge in the UASB is tested for pH, volatile fatty acids (VFA), alkalinity, COD ...
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