Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 11 (Q.No. 7)
7.
Which of the following are claimed as advantageous in respect of aerobic sludge digestion as compared to anaerobic sludge digestion ?
1. Lower BOD concentration in supernatant liquor.
2. Production of a sludge with excellent dewatering propensity.
3. Greater production of methane.
4. Lesser operating cost.
5. Lesser capital cost.
Select the correct answer using the codes given below :
1, 2 and 4
2, 3, 4 and 5
3, 4 and 5
1, 2 and 5
Answer: Option
Explanation:
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Discussion:
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