Q1: An activated sludge treatment plant treats a sewage at a flow of 3*103 m³/day with a BOD of 350 mg/l and returned sludge 20%. The dimension of the aeration tank is 25 m long, 10 m width and 4 m depth. The concentration of the mixed liquor suspended solids (MLSS) is 2500 mg/l. Calculate the F/M ratio, Detention time, Organic load.

Q1: An activated sludge treatment plant treats a sewage at a flow of 3*103 m³/day with a BOD of 350 mg/l and returned sludge 20%. The dimension of the aeration tank is 25 m long, 10 m width and 4 m depth. The concentration of the mixed liquor suspended solids (MLSS) is 2500 mg/l. Calculate the F/M ratio, Detention time, Organic load.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q-The MLSS concentration in an aeration tank is 2000 mg/l and the sludge volume after 30 minutes of setting in a 1000 ml graduated cylinder is 175 ml. Find the value of sludge density index (SDI).
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