Se ha denunciado esta presentación.
Utilizamos tu perfil de LinkedIn y tus datos de actividad para personalizar los anuncios y mostrarte publicidad más relevante. Puedes cambiar tus preferencias de publicidad en cualquier momento.

Waste management waste disposal methods (Sociology)

  • Inicia sesión para ver los comentarios

Waste management waste disposal methods (Sociology)

  1. 1. WASTE MANAGEMENT- WASTE DISPOSAL METHODS - REDUCING WASTE STREAM- WASTE DISPOSAL METHODS To know where the wastes go Waste management stresses ‘Three Rs’ Reduction, reuse and recycling before destruction
  2. 2. OPEN DUMPS  Unregulated dumps  Where people drop garbage  Disposal of wastes is serious problem  Enormous wastes  Mexico city generates 10,000 tons of waste every day  Wastes exposed to wind rain rats, flies  Developed countries forbid open dumping  Waste accumulated along road sides  Feeding of garbage to hogs  Health hazards associated with it  Odours , flies, rats, sanitation hazards  Razor blades, glass hazardous for hogs
  3. 3. OCEAN DUMPING Oceans are not for waste disposal Every year 25,000 metric tons of packaging 1,50,000 tons of fishing gear, 1000 km of nets are discarded in sea.
  4. 4. LAND FILLS Solid waste disposed by land fill By filling the refuse Land fills built away from rivers Rising land prices, transport costs More expensive disposal method Major cities do not have enough dumping place
  5. 5. WASTE EXPORT American cities are sending wastes to Africa Local people are unaware of this It is objectionable
  6. 6. INCINERATION AND RESOURCE RECOVERY Burning after sorting Energy being extracted Energy being recovered from technology Waste to resource By burning, used for heating, generating electricity They produce steam or electricity Sort the refuse before combustion Giant furnace are burnt as much as possible Causes greater problems of air pollution
  7. 7. REDUCING WASTE STREAM Shrinking waste stream Recycling with benefits
  8. 8. RECYCLING Reprocessing of discarded material into new useful methods Different from reusing Recycle material for same purpose Steel cans become new automobiles and construction materials Recycle saves money, energy, raw materials, reduce pollution
  9. 9. ENERGY FROM WASTE Energy extracted from wastes If used for constructive purposes it contributes to global warming
  10. 10. SOURCES OF ALTERNATE ENERGY Non-conventional sources of energy Sources of energy are solar energy, wind energy, tidal energy These energy sources are pollution free
  11. 11. REUSE AND LESS WASTE PRODUCTION Reuse preferred to recycling It is eco-friendly It is clearing and reusing materials The process to save costs and energy It is creative and sufficient way to reduce wastes

×