Question: Please write down the solution with steps or an explanation. Thank you! The two-pond system shown in Figure P1.12 is fed by a stream with

Please write down the solution with steps or an explanation. Thank

Please write down the solution with steps or an explanation. Thank you!

The two-pond system shown in Figure P1.12 is fed by a stream with flow rate 1.0 MGD (millions gallons per day) and BOD (a nonconservative pollutant) concentration 20.0mg/L. The rate of decay of BOD is 0.30/ day. The volume of the first pond is 5.0 million gallons, and the second is 3.0 million. Assuming complete mixing within each pond, find the BOD concentration leaving each pond

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