me k for the lagoon effluent is 0.30 d-1 (at 20 C)

a. If the CAFO lagoon effluent is discharged to the stream, what is the minimum DO that will be observed downstream? At what distance downstream does this minimum DO occur? b. How much BOD5 much be removed from the CAFO lagoon effluent, if any, if the DO in the river (after CAFO discharge) is never to go below 5 mg/L? If necessary, assume k for the lagoon effluent is 0.30 d-1 (at 20 C)