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___________ is a natural method of waste water treatment.

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in Environmental Biotechnology by (64.7k points)
___________ is a natural method of waste water treatment.

(a) Chemical method

(b) Physical method

(c) Water hyacinth pond

(d) Rotating biological contractors

I had been asked this question in a national level competition.

The origin of the question is Biological Treatment of Waste Water in division Biological Treatment of Waste Water of Environmental Biotechnology

1 Answer

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Best answer
The correct choice is (c) Water hyacinth pond

For explanation I would say: Water hyacinth pond natural method of waste water treatment using plantation of water hyacinth ponds used or secondary and tertiary treatment of waste water, Chemical method is harmful to the natural ecosystem and Physical method is time taking and tiresome, whereas, Rotating biological contractors used for treatment of pollutants from the wastewater using decomposed aerobic microorganisms.

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