Test: Oxidation And Stabilization Ponds, Sludge Dewatering


5 Questions MCQ Test Environmental Engineering - Notes, Videos, MCQs & PPTs | Test: Oxidation And Stabilization Ponds, Sludge Dewatering


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QUESTION: 1

Which of the following is an anaerobic process for treating sewage?

Solution:

Explanation: Oxidation pond, Oxidation ditch and Rotating Biological Contactors are an aerobic process of treating sewage whereas Imhoff tank is an anaerobic process of treating sewage.

QUESTION: 2

The minimum design depth of oxidation pond is

Solution:

Explanation: The minimum design depth of oxidation pond is 1m while its maximum design depth is 1.5m.

QUESTION: 3

The detention period of oxidation pond is

Solution:

Explanation: Oxidation ponds have a long detention period between 10 to 20 days.

QUESTION: 4

The maximum BOD removal efficiency of an oxidation pond is

Solution:

Explanation: The BOD removal efficiency of an oxidation pond lies between 80% and 90%, so the maximum BOD removal efficiency is 90%.

QUESTION: 5

 What is the minimum depth of water to be kept in oxidation pond?

Solution:

Explanation: The minimum depth of water to be kept in oxidation pond is 0.3m and the depth of sludge deposited in the pond is 0.02m per year.