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The organic loading in an activated sludge plant is defined as ___________

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The organic loading in an activated sludge plant is defined as ___________

(a) Mass of BOD per day/Volume of the aeration tank

(b) Volume of aeration tank/Mass of BOD per day

(c) The mass of BOD per day/Volume of secondary clarifier

(d) Aeration period * Volume of aeration tank

I have been asked this question in my homework.

Question is taken from Design of Activated Sludge Plant in section Sewage Filtration and Activated Sludge Process of Environmental Engineering

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Correct answer is (a) Mass of BOD per day/Volume of the aeration tank

Explanation: The organic loading in an activated sludge plant is defined as the mass of BOD to the aeration tank in grams per unit volume of aeration tank in m^3.

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