Question: please answer this q P1. An oxidation ditch activated sludge system receives 7500m3/d of municipal wastewater from the primary clarifier stage with a soluble BOD

please answer this q

P1. An oxidation ditch activated sludge system receives 7500m3/d of municipal wastewater from the primary clarifier stage with a soluble BOD of 210mg/L. The oxidation ditch (bioreactor) is 3m deep, 7 m wide and 200m long. It is operated at 1800mg/L biomass (MLSS), with biological constants of Y= 0.5 and kd=0.06d1. Determine the sludge age for 90%BOD removal

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