Q. A town disposes 1.05 m/s of treated wastewater into a river. The wastewater has an UBOD of 28 mg/l, and DO of 1.8 mg/

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Q A Town Disposes 1 05 M S Of Treated Wastewater Into A River The Wastewater Has An Ubod Of 28 Mg L And Do Of 1 8 Mg 1 (19.24 KiB) Viewed 22 times

(a) What is the UBOD immediately downstream of the outfall?
(b) What is the oxygen deficit immediately downstream of the outfall?
(c) What is the oxygen deficit 25 km downstream of the discharge point?
Q. A town disposes 1.05 m/s of treated wastewater into a river. The wastewater has an UBOD of 28 mg/l, and DO of 1.8 mg/L. Just upstream of the wastewater outfall, the river has a Now rate of 7.08 ms, ultimate BOD of 3.6 mg/L., and DO of 7.6 mgL. At the river temperature, the saturation concentration of DO is 8.5 mg/l. The deoxygenation coefficient is 0.61 d' and the reacration coefficient is 0.76 d'. The velocity of the river is 0.4 m/s (a) What is the UBOD immediately downstream of the outfall? (b) What is the oxygen deficit immediately downstream of the outfall? () What is the oxygen deficit 25 km downstream of the discharge point?