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This set of MCQs helps students to learn about solid waste Management, aerobic & anaerobic stabilization units.
Which of the following is an anaerobic process for treating sewage?
Oxidation pond is ineffective in removing pathogenic bacteria.
What is the minimum depth of water to be kept in the oxidation pond?
Which chemical is added to the oxidation pond to avoid bad odor?
The disposal of sewage from the septic tank is done by which of the following?
What is the maximum design flow of sewage in a septic tank?
Which of the following is not the method of disposal of sewage from septic tank?
What is the type of filter used in the septic tank when the rate of percolation is 90 minutes?
The maximum BOD removal efficiency of an oxidation pond is ___________.
90%
68%
70%
80%
The minimum depth of septic tank as per design consideration is ___________.
1.8m
1m
1.2m
1.5m
The detention period of a septic tank is ___________.
2 hours
12-36 hours
4 hours
1 week
The minimum design depth of oxidation pond is ___________.
0.3m
0.5m
1m
1.5m
The detention period of oxidation pond is ___________.
12-36 hours
4 hours
10-20 days
30-60 seconds
The concentration of biodegradable organic matter after the septic tank is ___________.
50ppm
100ppm
200ppm
75ppm
