Solid waste mgt


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Solid waste mgt

  2. 2. WHAT IS SOLID WASTE? • Solid or semi-solid waste material (including gases and liquids in containers) which are non soluble in nature are solid waste. • It may be hazardous or not and includes agricultural refuse, demolition waste, industrial waste, mining residues, municipal garbage and sewage sludge.
  3. 3. Waste Classification • Domestic waste • Factory waste • E-waste • Construction waste • Agricultural waste • Food processing waste • Bio-medical waste • Nuclear waste
  4. 4. Solid Waste
  5. 5. SOLID WASTE COMPOSITION source: estimate of ministry of forest and environmrnt
  6. 6. Solid Waste in India • 7.2 million tonnes of hazardous waste generated per year • One Sq km of additional landfill area reqiured every-year • Rs 1600 crore for treatment & disposal of these wastes • In addition to this industries discharge about 150 million tonnes of high volume low hazard waste every year, which is mostly dumped on open low lying land areas. Source: Estimate of Ministry of Environment & Forest
  7. 7. Growth of Solid Waste In India • Waste is growing by leaps & bounds • In 2002-2012, population of Mumbai increased from 8.2 million to 12.3 million • During the same period, municipal solid waste has grown from 3200 tonnes to 5355 tonne, an increase of 67% • Waste collection is very low for all Indian cities • City like Bangalore produces 2000 tonnes of waste per annum, the ever increasing waste has put pressure on hygienic condition of the city Source: The Energy & Resources Institute, New Delhi
  8. 8. How solid waste affected us in past years? • Cloudburst in Mumbai clogged the sewage line due to large number of plastic bags • Stray animals dying on streets and farmland due to consumption of plastic bags, which blocks the food movement in their stomach • Reduction in the number of birds due to consumption of hazardous waste
  9. 9. Major Polluting Industries in India • Around 2500 tanneries discharge 24 million cubic metre of waste water containing high level of dissolved solids and 4,00,000 tonnes of hazardous solid waste • Thermal power plants and around 300 distilleries discharge huge waste materials which are disposed without proper treatment.
  10. 10. Waste Collection in India • Primarily by the city municipality -Collection of waste product eg glasses, polybags, paper shreds etc -Dump these wastes to the city outskirts • Local rag pickers -Collecting glass bottles -Collecting paper for recycling • Sophisticated Waste Management (By Waste Management vehicle) -Collecting bio-degradable and non bio degradable waste separately
  12. 12. Managing Waste Recycling: Processing of a waste item into usable forms. Benefits of recycling: -Reduce environmental degradation -Making money out of waste -Save energy that would have gone into waste handling & product manufacture Saving through recycling: -When Al is resmelted- considerable saving in cost -Making paper from waste saves 50% energy -Every tonne of recycled glass saves energy equivalent to 100 litres of oil
  13. 13. OPEN DUMPING  They are in open areas  Minimum effort and expense  Unsanitary and smelly  Vermin and pests breed there  Contaminate soil, water and air  Chances of fire hazard  Therefore it is not much preferred
  14. 14. SANITARY LANDFILLS Sanitary landfills have largely replaced open dumps. Each day trash is spread in thin layers It is then compacted down Covered with a soil layer Graded for drainage
  15. 15. INCENARATION Incineration is a waste treatment process that involves the combustion of solid waste at 1000 degree celsius. waste materials are converted into ash, flue gas, and heat. The ash is mostly formed by the inorganic constituents of the waste and gases due to organic waste. the heat generated by incineration is used to generate electric power.
  17. 17. OCEAN DUMPING Ocean dumping is the dumping or placing of materials in the ocean, often on the continental shelf in specially designed containers. A wide range of materials are involved, including garbage, construction and demolition debris, sewage sludge, dredge material, waste chemicals, and nuclear waste.
  18. 18. BIOLOGICAL REPROCESSING Materials such as plants, food scraps, and paper products can be decomposed into the organic matter. The organic matter that is produced from this type of recycling can then be used for such things as landscaping purpose or agricultural uses. Usually this method of recycling is done by putting the materials in a container and let to stay there until it decomposes.
  19. 19. PLASMA GASIFICATION Plasma gasification is a new garbage disposal solution using plasma technology. Uses electrical energy and the high temperatures (4000°C to over 7000°C) created by an plasma torches. Almost completely breaks down the waste into syngas which are used to generate electricity. The remaining material (slag) is used to produced material for building projects
  20. 20. OUR CONTRIBUTION Reduce paper waste Switch to reusable transport containers. Reuse furniture and supplies such as envelopes, file folders etc  Use durable towels, tablecloths, napkins, dishes, cups, and glasses Donate/Exchange: old books,old clothes,old computers,excess building materials,old equipment to local organizations
  21. 21. THANK YOU