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What is the Composition of Wastewater?

By: Haseeb Jamal / On: Apr 27, 2017 / Definition, Shallow

The typical composition of wastewater based on strength. The important characteristics measured in wastewater included...

  • Biochemical Oxygen Demand (BOD) [100-300 mg/L as O2]
  • Suspended solids (SS) [100 – 350 mg/L]
  • Settleable solids [5-20 mL/L]
  • Total Kjeldahl nitrogen (TKN) [20-80 mg/L]
  • Total Phosphorus [5-20 mg/L as P]

A typical solids analysis of wastewater, of the total solids, 50% is dissolved, 50% suspended. Of the suspended solids, 50% will settle. Industrial activity changes the composition of wastewater, often introducing toxic substances such as chromium and cadmium from plating operations.

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