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Which of the following methods uses earthworms during composting?

(a) Vermicomposting

(b) Vertical composting

(c) Windrow composting

(d) Burning

This question was posed to me in exam.

The origin of the question is Aerobic Treatment of Solid Wastes topic in portion Biotechnology for Solid Waste Management of Environmental Biotechnology

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The correct answer is (a) Vermicomposting

Easiest explanation: Vermicomposting is a method that uses earthworms during composting by degrading the organic wastes present in the bulk waste material, in vertical reactor, waste flows vertically and that is called as Vertical composting, in windrow composting there is a direct contact between the waste and the atmosphere, whereas, burning is not a composting process.

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