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What is the composition of Untreated Domestic Sewage ?
Typical composition includes
Biochemical oxygen demand, BOD
Total organic carbon (TOC)
Chemical oxygen demand (COD)
Total solids which includes Dissolved Solids (Fixed and Volatile) Suspended solids (Fixed and Volatile)
Total nitrogen as (Organic, Free ammonia, Nitrites, and Nitrates)
Total phosphorus as P (Organic and Inorganic)
concentration of these constituents make effluent or sewage strong medium and weak in terms of pollution.