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Composition Of Untreated Domestic Sewage Wastewater

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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)

  • Settleable solids

  • Total nitrogen as (Organic, Free ammonia, Nitrites, and Nitrates)

  • Total phosphorus as P (Organic and Inorganic)

  • Chlorides

  • Alkalinity

  • Grease

concentration of these constituents make effluent or sewage strong medium and weak in terms of pollution.


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