municiple solid wastes msw = pollution or resource? pollution is the contamination of air, water, or...
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Municiple Solid Wastes
MSW = Pollution or Resource?
Pollution is the contamination of air, water, or soil with undesirable amounts of material or heat.
“Ecosystems dispose of wastes and replenishnutrients by recycling all elements”
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Factors Contributing to Increasing Amounts of MSW
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Factors Contributing to Increasing Amounts of MSW
• Increasing populations• Changing lifestyles• Disposable materials*• Excessive packaging*
* = two largest contributors to waste volume
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Changing Lifestyles of More People
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MSW Components in the US
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The Fate of MSW in the US
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Old Landfills
• Leachate generation
• Groundwater Contamination
• Methane production
• Incomplete decomposition
• Settling
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Siting: Public Reactions
• LULU (locally unwanted landuse)
• NIMBY (not in my backyard)
• NIMTOO (not in my term of office)
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Trash to Treasure
• Highest (more than 1 million tons) net importers of MSW– Illinois– Indiana– Ohio– Pennsylvania– Virginia
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Waste to Energy: WTE
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Waste to Energy: WTE
• 80% MSW burned for electrical energy production
• 12% recovered and recycled
• 8% put into landfill
• Methane capture for electrical energy production.
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Reduction and Recycling
• 75% MSW recyclable if:
– Mandatory
– Easy to do
– $ Benefits
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Secondary Recycling
• Paper• Glass• Plastic• Metals• Yard wastes• Textiles• Old tires
• Compost• Refabrication• Synthetic lumber• Sand or gravel• Insulation• Strengthens recycled
paper• Highways
Match
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Sustainable MSW Management
• Waste reduction
• Safe waste disposal
• Recycling and reuse
• Electrical power generation