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__________ method can be used for enhancing the performance of waste stabilization ponds.

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__________  method can be used for enhancing the performance of waste stabilization ponds.

(a) Water hyacinth pond

(b) Reed beds

(c) Duck weed ponds

(d) Algal fish ponds

I had been asked this question in unit test.

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

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The correct option is (a) Water hyacinth pond

The best explanation: Water hyacinth pond is used for secondary and tertiary treatment of waste water, removing organic matter and suspended solids, and hence, enhances the performance of waste stabilization ponds, Reed beds are a part of a succession from young reeds which colonize open water and can be used to treat liquid effluent, Algal fish ponds is used to increase the quality of water, Duck weed ponds convert organic pollutants in fish biomass.

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