Question
Write short note: Land-filling sites.
✓
Answer
- In the land-filling sites the degradable wastes are transferred. Usually such sites are in urban areas.
- The land-filling sites are away from the residential areas for the hygienic reasons. Here large pits arb dug in open spaces.
- These pits are lined with plastic sheets. Therefore, the leaching of toxic and harmful materials is avoided to reduce the chance of soil pollution due to leachates.
- Compressed waste is put in the pit and is covered with layers of soil, saw dust, leafy waste.
- Specific biochemical substances are added for speedy decomposition.
- Bioreactors which are mixtures of bacteria are mixed at some places.
- Soil microbes and other top layers decompose the waste.
- Soil slurry is used to seal the pits completely.
- After a certain period, best quality compost is formed. Such land filling sites can be reused after removal of compost.
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