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1. Two treatment tanks that are completely mixed and operating at steady state are connected to one another. The flowrate of influent to Tank #1

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1. Two treatment tanks that are completely mixed and operating at steady state are connected to one another. The flowrate of influent to Tank \#1 is 1 million L per day and BOD 5 concentration is 20mg/L. The rate of decay of BOD5 is 0.3/ day. The volume of the Tank \#1 is 5 million liter and Tank \#2 is 3 million liter. Calculate the effluent concentration of BOD5 of Tank \#1 and Tank \#2. (15 points)

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