Thursday, September 26, 2019

Wastewater treatment - preliminary treatment

PRELIMINARY TREATMENT

  • Preliminary treatment consists only to separate floating material and heavy settleable inorganic solids
  • It helps in removing oil and grease from the sewage
  • This treatment helps reduce the BOD load of wastewater. The processes involved are
    • Screening to remove floating material
    • Grit chambers or detritus tanks for removing grit and sand
    • Skimming tanks for removing oil and grease

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