Solid Waste Management Lilian Giertz. Overview What is solid waste? How does this affect us? ...
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Transcript of Solid Waste Management Lilian Giertz. Overview What is solid waste? How does this affect us? ...
Overview
What is solid waste?
How does this affect us?
Current management practices
Future management possibilities
Discussion
What is solid waste?
Solid waste – anything we throw away or discard
Petruscible waste – animal and vegetable waste
Municipal solid waste (MSW) – garbage
Breakdown of MSW
34%
8%
5%12%
6%
12%
13%
11%
Waste
PaperMetalsGlassPlasticsWoodFoodYard ClippingsOther
How does this affect us?
2.1 kg per capita per day
767 kg per capita per year
Costs money
Land use
Lost resources
Current Procedure
Waste generation
Separation and collection
Central storage facility (if applicable)
Transport and disposal
Waste Generation
Industrial, commercial, and residential
Source Reduction:
Composting
Recycling
Reuse
Education and legislation
Transport
Directly to the landfill from the source
To processing plant for treatment
Shipped to landfill by train or truck
Disposal by Sanitary Landfill
Site selection
Public views
Soil conditions, topography, groundwater
Local roadways, traffic patterns
Cover material availability
Location specifics: seismic activity, flooding, etc
Disposal by Sanitary Landfill
Monitor, collect, and treat leachate
Ammonia
Heavy metals
Hydrocarbons
Inorganic salts
Disposal by Sanitary Landfill
Harness methane gas
Hazardous to environment
Explosive when in contact with oxygen
Collect gas and purify for energy generation
Not 100% efficient
Current Process
Disadvantages
Land usage
Harmful leachate and gas production
Wasting usable materials
Future Management Possibilities
Incineration
Refuse-Derived Fuel Facilities – separation of the combustible materials from noncombustible parts
Gasification
Partial combustion using less oxygen to create energy