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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 wasteCau

SBR / Cyclic Ac vated Sludge Process • Better Quality Effluent : 98 % BOD removal efficiency. Sewage can be treated to reuse/recycle quality of TSS < 10 mg/l, COD < 100 ppm, BOD < 10 ppm, TN < 10 ppm, TP < 2 ppm in a single stage of treatment using Batch process. • Bio-nutrient removal (BNR) : N & P removal

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