A sewage treatment plant discharges 5000 m3 /d of treated wastewater into Sungai Sembrong. The treated wastewater has a BOD5 of 12 mg/L and a BOD decay constant (k) of 0.12 day-1 at 20oC. Sungai Sembrong has a flow rate of 0.5 m3 /s and an ultimate BOD (Lo) of 5 mg/L. The DO of the river is 6.5 mg/L and the DO of the wastewater is 6 mg/L. Calculate the DO and initial ultimate BOD (Lo) after mixing. Given: BODt = Lo(1-e -kt)
A sewage treatment plant discharges 5000 m3 /d of treated wastewater into Sungai Sembrong. The treated wastewater has a BOD5 of 12 mg/L and a BOD decay constant (k) of 0.12 day-1 at 20oC. Sungai Sembrong has a flow rate of 0.5 m3 /s and an ultimate BOD (Lo) of 5 mg/L. The DO of the river is 6.5 mg/L and the DO of the wastewater is 6 mg/L. Calculate the DO and initial ultimate BOD (Lo) after mixing. Given: BODt = Lo(1-e -kt)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A sewage treatment plant discharges 5000 m3
/d of treated wastewater into Sungai
Sembrong. The treated wastewater has a BOD5 of 12 mg/L and a BOD decay
constant (k) of 0.12 day-1
at 20oC. Sungai Sembrong has a flow rate of 0.5 m3
/s
and an ultimate BOD (Lo) of 5 mg/L. The DO of the river is 6.5 mg/L and the DO
of the wastewater is 6 mg/L. Calculate the DO and initial ultimate BOD (Lo) after
mixing.
Given: BODt = Lo(1-e
-kt)
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