What is the residence time in this tank

Reference no: EM13533400

1.A sample of dry sand having a unit weight of 105 pcf and a specific gravity of 2.70 is placed outdoors. During a storm, the sample degree of saturation increased to 40% while its total volume did not change. Determine the total unit weight and water content of the sample after being wet.

2.Given the following BOD test results..

Initial DO = 8 mg?L

Final DO = 0 mg?l

Dilution = 1/10

what can you say about

a. BOD5

b. BOD ultimate

c. COD

3.a settling tank has a dimension of 3m deep, 10 m long, and 4 mwide. The flow entering the tank is 10 cubic meters perminute.

a. what is the residence time in this tank

b. what is the velocity of a critical particle in thissettleing tank

Reference no: EM13533400

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What is the residence time in this tank : A sample of dry sand having a unit weight of 105 pcf and a specific gravity of 2.70 is placed outdoors. During a storm, the sample degree of saturation increased to 40% while its total volume did not change. Determine the total unit weight and wate..

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