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ESE 2021 Technical Quiz || Environmental Engineering || Quality and Treatment of Sewage
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Question 1
Five-days BOD of a 10% diluted sample having DO = 6.7 mg/l, DS = 2 mg/l and consumption of oxygen in blank = 0.5 mg/l, will be
Question 2
Statement (I) : Anaerobic sludge digester, by itself, is considered to be the better method than other methods of sludge treatment.
Statement (II) : During Anaerobic sludge digestion, CH4 is produced; also rodents and other pests are attracted when digester sludge is dried.
Question 3
Consider the following statements in respect of anaerobic sludge digester:
1) It is less expensive compared to several other methods available.
2) Processing of separable solids impacts the environment to a minimum
3) Quantity of separated solids requiring disposal is minimal
4) Digested sludge is very readily dewaterable.
Which of the above statements are correct?
1) It is less expensive compared to several other methods available.
2) Processing of separable solids impacts the environment to a minimum
3) Quantity of separated solids requiring disposal is minimal
4) Digested sludge is very readily dewaterable.
Which of the above statements are correct?
Question 4
A town ship is to treat 700000 litres of sewage per day which has a 5 days BOD of 160 mg/l. An oxidation pond is used for the purpose. The effluent has a BODof 10 mg/l. The rate of loading is 70 kg of 5 day BOD per hectare per day. the required area (in ha) of pond is:
Question 5
Which of the following is NOT the correct advantage of an oxidation Ditch:
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Jun 9ESE & GATE CE
