A waste water effluent of 560 l/s with a BOD = 50 mg/l, DO = 3.0 mg/l and temperature of 23°C enters a river where the flow is 28 m³/sec, and BOD = 4.0 mg/l, DO = 8.2 mg/l, and temperature of 17°C. k, of the waste is 0.10 per day at 20°C. The velocity of water in the river downstream is 0.18 m/s and depth of 1.2 m. Determine the following after mixing of waste water with the river water. (i) Combined discharge (iii) DO and (ii) BOD (iv) Temperature

A waste water effluent of 560 l/s with a BOD = 50 mg/l, DO = 3.0 mg/l and temperature of 23°C enters a river where the flow is 28 m³/sec, and BOD = 4.0 mg/l, DO = 8.2 mg/l, and temperature of 17°C. k, of the waste is 0.10 per day at 20°C. The velocity of water in the river downstream is 0.18 m/s and depth of 1.2 m. Determine the following after mixing of waste water with the river water. (i) Combined discharge (iii) DO and (ii) BOD (iv) Temperature

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 storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

A waste water effluent of 560 l/s with a BOD 50 mg/l, DO = 3.0 mg/l and
temperature of 23°C enters a river where the flow is 28 m³/sec, and BOD= 4.0 mg/l, DO = 8.2 mg/l, and
temperature of 17°C. k, of the waste is 0.10 per day at 20°C. The velocity of water in the river downstream
is 0.18 m/s and depth of 1.2 m. Determine the following after mixing of waste water with the river water.
(i) Combined discharge
(iii) DO and
(ii) BOD
(iv) Temperature

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