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Calculate the breadth of the rapid sand filter for the following details. Flow: 500 m3/h. Velocity: 5 m/h Backwash time: 20 mins

Calculate the breadth of the rapid sand filter for the following details. Flow: 500 m3/h. Velocity: 5 m/h Backwash time: 20 mins Correct Answer 3.7 m

The total operation time equals 24 minus the back wash time. Area equals Flowrate × total hours of operation/ [velocity × total hours of operation × (total hours of operation-backwash time). Area= 500 × 24/ (5 × 24 × 23.7) =4.5 m2. Length: Breadth is in the ratio 1:3. Breadth = 3.7 m.

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Select your answer based on the coding system given below: