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The hydrogen sulfide gas formed during the filtration of sewage can be removed by ___________

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+1 vote
in Environmental Engineering by (81.4k points)
The hydrogen sulfide gas formed during the filtration of sewage can be removed by ___________

(a) Carbonation

(b) Chlorination

(c) Addition of lime

(d) Titration with potassium dichromate

The question was asked in final exam.

Question is taken from Conventional Trickling Filter topic in section Sewage Filtration and Activated Sludge Process of Environmental Engineering

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Best answer
The correct choice is (b) Chlorination

To elaborate: The hydrogen sulfide gas is formed when the fixed nozzles are used during the filtration process, so sewage is chlorinated to prevent the formation of H2S gas.

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