The City of Smyrna discharges 0.16 m3/s of treated wastewater into Chattahoochee River. The BOD5 for the wastewater is 30 mg/L. The river has a 10-year, 7-day low flow of 0.16 m3/s. Upstream of the wastewater outfall from Smyrna, the BOD5 is 3.2 mg/L. The BOD rate constants k are 0.202 d-1 and 0.085 d-1 for the wastewater and creek respectively. The temperature of both the creek and the municipal wastewater is 20oC. Calculate the initial ultimate BOD after mixing

Answered: The City of Smyrna discharges 0.16 m3/s…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The City of Smyrna discharges 0.16 m³/s of treated wastewater into Chattahoochee River. The BOD₅ for the wastewater is 30 mg/L. The river has a 10-year, 7-day low flow of 0.16 m³/s. Upstream of the wastewater outfall from Smyrna, the BOD₅ is 3.2 mg/L. The BOD rate constants k are 0.202 d^-1 and 0.085 d^-1 for the wastewater and creek respectively. The temperature of both the creek and the municipal wastewater is 20^oC. Calculate the initial ultimate BOD after mixing

Expert Solution

Step 1

Discharge of sewage $Q_{s} = 0.16 m^{3} / s$

Discharge of river, $Q_{R} = 0.16 m^{3} / s$

$B O D_{5}$ of sewage, $= 30 m g / L$

$B O D_{5}$ of river, $= 3.2 m g / L$

Deoxygenation constant at $20 ° C$ , $K_{D} = 0.085 / d$

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