Question

the design flow for a plant, using 4 tricking filters with a plastic media, is 0.5 mgd. the filters will be in parallel, the influent bod5 to filters will be 200 mg/l, the required effluent bod 5 will e 25 mg/l, the trickling filter design depth is 25 ft. lab testing conducted at 25c and 40 ft depth found the biodegradability constant to be 0.865/ft 0.5 d ^0.5. find the diameter required for each trickling filters.

Answer 1