A city disposes of its treated wastes to a river on a continuous basis. The minimum flow in river is 210 m³/s, and the discharge rate from the treatment plant is 12.5 m³/s. Assume tha maximum acceptable limit for a certain pollutant is 1 mg/L in the downstream river, and the background concentration of this pollutant upstream is 0.4 mg/L. a. The maximum concentration of the pollutant, that can be safely released from the water pollution control plant, is mg/L. h. If the concentration of the pollutant unstroam yarios from 01 to 0.5 mall and the disch:

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A city disposes of its treated wastes to a river on a continuous basis. The minimum flow in the
river is 210 m³/s, and the discharge rate from the treatment plant is 12.5 m³/s. Assume that the
maximum acceptable limit for a certain pollutant is 1 mg/L in the downstream river, and the
background concentration of this pollutant upstream is 0.4 mg/L.
a. The maximum concentration of the pollutant, that can be safely released from the water
pollution control plant, is
mg/L.
b. If the concentration of the pollutant upstream varies from 0.1 to 0.5 mg/L and the discharge
rate from the treatment plant varies from 10 to 15 m, the maximum concentration that can be
released to meet the limit of 1 mg/L should be mg/L
15.4 8.0 11.5 19.9 11.1 13.6 9.9
Transcribed Image Text:A city disposes of its treated wastes to a river on a continuous basis. The minimum flow in the river is 210 m³/s, and the discharge rate from the treatment plant is 12.5 m³/s. Assume that the maximum acceptable limit for a certain pollutant is 1 mg/L in the downstream river, and the background concentration of this pollutant upstream is 0.4 mg/L. a. The maximum concentration of the pollutant, that can be safely released from the water pollution control plant, is mg/L. b. If the concentration of the pollutant upstream varies from 0.1 to 0.5 mg/L and the discharge rate from the treatment plant varies from 10 to 15 m, the maximum concentration that can be released to meet the limit of 1 mg/L should be mg/L 15.4 8.0 11.5 19.9 11.1 13.6 9.9
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