- 04/30/2019 at 6:26 am #725472EduGorillaKeymasterSelect Question Language :
A completely mixed activated sludge process is used to treat a wastewater flow of 1 million litres per day (1 MLD) having a BOD5 of 200 mg/L. The biomass concentration in the aeration tank is 2000 mg/L and the concentration of the net biomass leaving the system is 50 mg/L. The aeration tank has a volume of 200 m3.
What is the average time for which the biomass stays in the system?
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