Design Consideration

Sufficient time under quiescent conditions for maximum settling (SS removal) to occur.

Figure 7 illustrates the relationship between settling time and primary sedimentation removal efficiency of settleable solids and suspended solids for typical municipal wastewater treatment.


    Figure 6

  • Avoid:
    • Eddy currents (by incoming flow and sludge scraper); 
    • Surface current (by wind); 
    • Vertical current (outlet structure); 

    Figure 7

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