It takes 30 hours for water to flow from Point A to point B in a river. The flow rate and BOD5 in the river are 10 m^3/hr and 2 mg/L, respectively. A wastewater of flow rate 2 m^3/hr containing BOD5 of 30 mg/L is discharged into the river at point A. Calculate the BOD5 concentration at downstream point B by treating the river as 20 CMFRs in series with equal hydraulic detention times. The first order decay coefficient k of the BOD5 is assumed to be 0.065/hr.
It takes 30 hours for water to flow from Point A to point B in a river. The flow rate and BOD5 in the river are 10 m^3/hr and 2 mg/L, respectively. A wastewater of flow rate 2 m^3/hr containing BOD5 of 30 mg/L is discharged into the river at point A. Calculate the BOD5 concentration at downstream point B by treating the river as 20 CMFRs in series with equal hydraulic detention times. The first order decay coefficient k of the BOD5 is assumed to be 0.065/hr.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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It takes 30 hours for water to flow from Point A to point B in a river. The flow rate and BOD5 in the river are 10 m^3/hr and 2 mg/L, respectively. A wastewater of flow rate 2 m^3/hr containing BOD5 of 30 mg/L is discharged into the river at point A. Calculate the BOD5 concentration at downstream point B by treating the river as 20 CMFRs in series with equal hydraulic detention times. The first order decay coefficient k of the BOD5 is assumed to be 0.065/hr.
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Wouldn't we have to take into account the 20 CMFRs to calculate the BOD5 at point B?
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