A 5000 m3/day wastewater treatment plant discharges to a river with a minimum drought flow of 140 m3/min (upstream of outfall)
a)What total allowable BOD (kg/day) could be discharged by the plant if the BOD in the river after initial dilution must not exceed 1 mg/l and no upstream pollution is occurring?
b) What degree of treatment (%) does this represent, assuming the plant influent to have a BOD of 300 mg/l.