Primary Sedimentation Clarifier

 
  • Removal objectives -- settlable and floating organic and inorganic solids. 
  • Settling phenomena -- from discrete to flocculation (see related textbook). 
  • Critical factors -- overflowrate and detention time. 
  • Removal efficiency -- SS 50 - 60% ; BOD5 30 - 35%. 
  • Sludge percentage<6%, and specific gravity1.03.

  • Figure 3 illustrates the operation of a primary sedimentation clarifier.
     


    Figure 3 

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