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Calculate the flow rate of the backwash pump to be used for a dual media filter with the following data. Flowrate: 2200 m3/h Rise velocity of DMF: 15 m/h

Calculate the flow rate of the backwash pump to be used for a dual media filter with the following data. Flowrate: 2200 m3/h Rise velocity of DMF: 15 m/h Correct Answer 3520 m3/ h

First the area of the filter is found out. Area = 2200/15=147 m2. Then by multiplying area x the velocity of the backwash pump assumed we derive at the flowrate. Flowrate= 147 m2 x 24 m/h = 3520 m3/h.

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