+1 vote
in Environmental Biotechnology by (64.7k points)
Which of the following technique is environment friendly and cost effective?

(a) Biological

(b) Chemical

(c) Physical

(d) Combination of physical and chemical

The question was posed to me during an online interview.

Asked question is from Microbial Processes in Wastewater Treatment topic in portion Biological Treatment of Waste Water of Environmental Biotechnology

1 Answer

+2 votes
by (736k points)
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Best answer
Right choice is (a) Biological

For explanation I would say: Biological purification technique of waste water is environment friendly and cost effective whereas Chemical, Physical or a Combination of physical and chemical is efficient but can cause secondary pollution.

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