Solid Waste Management

• 1)Solid Waste Managment
  • Solid wastes mainly include municipal wastes, hospital wastes, industrial wastes and e-wastes etc.,
  • The Solid wastes are dumbed in the soil which results in landscape pollution
  • Solid Waste Management involves the collection, treatment and proper disposing of solid material that is discarded from the household and industrial activities.
• Methods of soild wastes disposal
  • a) Segreation: It is the separation of different type of waste materials like biodegradable and non biodegradable and non biodegradable wastes
  • b) Sanitary landfill :Solid wastes are dumped into low lying areas. The layers are compacted by trucks to allow settlement. The waste materials get stabilised in about 2-12 months. The organic matter undergoes decomposition.
  • c) Incineration: It is the burning of non-biodegradable soild wastes (medical wastes) in properly constructed furnace at high temperature.
  • d) Composting : Biodegradable matter of soild wastes is digested by microbioal action or earthwarms and converted into humus
• Recycling of Wastes
  • Papers from old books, magazines and newspapers are recycled to produce papers in papermills.
  • Agricultural wastes like cocount shells, jute contton stalk, bagasse of sugarcane can be used to make paper and hard board. Paddy husk can be used as livestock fodder.
  • Cowdoung and other organic waste can be used in gobar gas plant to provide biogas and manure for fields.
• What is 3R or RRR
  • The 3R approach such as Reduce, Reuse and Recyle may be followed for effective waste Management
• Points to remember and voice lessons
  • Conservation is a process which is concerned with use, preservation and proper managment of natural resources from destructive activities of human beings
  • Conservation of natural resources contributes to the social and economic development of the country.
  • Forests of a country constitue a major asset for the pepole of the country.
  • National Park is a reserved area for the conservation of entire wildlife including plants and animals.
  • Sanctuary is a place reserved exclusively for the use of animals.
  • Solar cells is a device that absorbs sunlight and converts it into elecric energy.
  • Solar water heater does not require electricity, They heat up water directly from sunlight.
  • Biogas is produced by the anaerobic decomposition of cow dung.
  • The technique of collecting and storing rain water for future purpose is known as rainwater harvesting
  • Unwanted, non-working and outdated electronic products become e-waste