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MUNICIPAL WASTE COMPOST PLANTS -

Forced aeration compost plants are used to convert organic waste to manure. The process of decomposition converts organic wastes generated everyday (in homes, restaurants, offices, schools, canteens, markets and gardens) to produce nutrient rich compost. The compost plant consists of several sub ground or partially above ground brick masonry structures (depending on the quantity of waste to be treated) built in series. A slope is provided at the bottom of the pits for withdrawing the lechate which flows into a common lechate tank. A lechate tank is required to collect the excess water and ensure good drainage. Air is blown at the bottom of the pit. This not only maintains the temperature in the compost pit but also facilitates mixing and provides oxygen for aeration. The organic fraction of the municipal solid waste is converted into compost in about 75 days. The compost has to be dried on drying platforms for 2-3 days, sieved and bagged.

The forced aeration compost plants convert the organic waste into manure. This is different from the plug flow digesters that convert organic fraction of the waste into biogas and compost.