A conventional activated sludge plant is to be designed to achieve a mean effluent BOD and TSS value of 10 mg/L. Determine the number of annual occurrences of BOD and TSS values exceeding 20mg/L. Assume the geometric standard deviation (sg) is 1.3 for effluent BOD and TSS.

A conventional activated sludge plant is to be designed to achieve a mean effluent BOD and TSS value of 10 mg/L. Determine the number of annual occurrences of BOD and TSS values exceeding 20mg/L. Assume the geometric standard deviation (sg) is 1.3 for effluent BOD and TSS.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Seepage

Section: Chapter Questions

Problem 7.6P

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Concept explainers

Groundwater Flow

The term groundwater refers to the water which is found beneath the earth's surface. Pores present in the soil and rocks with fractures make a passage for rainwater to enter the earth's surface and deposit as groundwater. The flow nature and direction of groundwater under the earth's surface directly impacts the strength and compressibility of the soil, which reflects its ability to support structural loads.

Question

3. A conventional activated sludge plant is to be designed to achieve a mean effluent BOD and TSS
value of 10 mg/L. Determine the number of annual occurrences of BOD and TSS values
exceeding 20mg/L. Assume the geometric standard deviation (sg) is 1.3 for effluent BOD and
TSS.

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