Chapter : 8. Our Environment
Pig and Cattle Feeding
Pig and Cattle Feeding :
Pigs and stray cattle feed on garbage and reduce its bulk.
Rag Picking :
Rag pickers remove various recyclable articles like rags, polythene, plastic articles, glass pieces, cans, paper, cardboard, etc.
Recycling :
Articles salvaged by rag pickers are recycled. Waste paper yields cardboard while waste cotton textiles are used to produce paper.
Composting :
Garbage is shredded and mixed with sewage sludge and other organic remains. It is converted into compost or vermicompost.
Biogas and Manure :
Organic wastes can also be decomposed anaerobically to yield biogas and manure.
Burning :
The solid combustible waste is burnt. It, however, causes air pollution.
Incineration :
Organic waste is aerobically burnt at 850ºC inside incinerator. Ash and unburnt matter is disposed off in land filling.
Pyrolysis :
It is anaerobic combustion of organic waste at a temperature of 1650ºC.
Land-filling or Dumping :
Solid waste is pulverised and dumped into a low lying area.
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