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. 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. 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. 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
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
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. ENERGY FROM WASTE
Energy extracted from wastes
If used for constructive purposes it contributes
to global warming
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. 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