Determine the volume of three identical activated-sludge tanks following primary clarification to aerate 36,000 nv3/d witha bod concentration of 180 mg/l at a bod loading of 560 g/m3 0 d. what is the aeration time? for an fl m of 035. whatmlss concentration should be maintained in the aeration tanks? estimate the operating sludge age, assuming an effluentsuspended solids of 30 mg/l and the daily amount of waste-activated sludge solids from figure 13.1. if the waste sludgehas a concentration of 10.000 mg/l, what is the calculated volume of sludge to be wasted each day? determine thedimensions of three identical rectangular clarifiers (length. width, and side-water depth) with a 21 length-to-width ratio.