1.

Calculate the flow rate of the backwash pump to be used for a dual media filter with the following data.
Flowrate: 2200 m3/h

A. nRise velocity of DMF: 15 m/h
B. t4500 m<sup>3</sup>/ h
C. t3520 m<sup>3</sup>/ h
D. t3750 m<sup>3</sup>/ h
E. t4920 m<sup>3</sup>/ h
Answer» C. t3520 m<sup>3</sup>/ h


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