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     EduGorilla 
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    Consider the following average operating data for conventional activated sludge treatment plant at Kozhikode.Waste water flow = 35000 m3/day
    Volume of aeration tank = 10,900 m3
    Influent BOD = 250 mg/lit
    Effluent BOD = 20 mg/lit
    Find out the aeration period.

    Options :-

    1. 750 hrs
    2. 7.5 hrs
    3. 0.75 hrs
    4. 7.5 days
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