Problem 3: You are considering three design alternatives for treating a pollutant in wastewater using a first- order process (k = 1.5 min-¹). The flow is 9 million gallons per day (mgd). The three alternatives, each of which has a total volume of 10,000 gallons, are: (1) one 10,000 gallon well-mixed basin; (2) two 5,000 gallon well- mixed basins in series (see sketch below); and (3) one 10,000 gallon pipe. Calculate the percent removal of the pollutant for each alternative at steady state. Which system gives the best removal? Two tanks in series

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Problem 3: You are considering three design alternatives for treating a pollutant in wastewater using a first-
order process (k = 1.5 min¯¹). The flow is 9 million gallons per day (mgd). The three alternatives, each of which
has a total volume of 10,000 gallons, are: (1) one 10,000 gallon well-mixed basin; (2) two 5,000 gallon well-
mixed basins in series (see sketch below); and (3) one 10,000 gallon pipe. Calculate the percent removal of the
pollutant for each alternative at steady state. Which system gives the best removal?
Two tanks in series
Transcribed Image Text:Problem 3: You are considering three design alternatives for treating a pollutant in wastewater using a first- order process (k = 1.5 min¯¹). The flow is 9 million gallons per day (mgd). The three alternatives, each of which has a total volume of 10,000 gallons, are: (1) one 10,000 gallon well-mixed basin; (2) two 5,000 gallon well- mixed basins in series (see sketch below); and (3) one 10,000 gallon pipe. Calculate the percent removal of the pollutant for each alternative at steady state. Which system gives the best removal? Two tanks in series
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