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Civil Engineering Practice • Water Resources & Environmental

Treatment & Water Quality

6 min read

Worked

  • 12 mL of sample in a 300 mL bottle (P = 0.04), DO falls from 8.4 to 3.6 mg/L: BOD₅ = 4.8/0.04 = 120 mg/L.
  • A 60 ft diameter clarifier treating 2 MGD: area 2,830 ft², overflow rate 2,000,000/2,830 = 707 gpd/ft².

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