solid waste. waste disposal municipal solid waste— waste materials from homes, businesses and...
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Solid Waste
Waste Disposal
• Municipal solid waste—waste materials from homes, businesses and other parts of the community
• Other solid waste comes from construction debris and certain agricultural and industrial wastes.
Waste Disposal
• Three methods of handling solid waste:– Bury it– Burn it– Recycle it
Waste Disposal
• Landfills– Open dumps were used until relatively
recently. (1976)• Leachate is a polluted liquid made when rainwater
dissolves chemicals
– Sanitary landfills hold municipal solid waste, construction debris, and some types of agricultural and industrial waste
• They have plastic liners and are capped with clay to prevent rainwater from entering.
Waste Disposal• Incineration
– Burning of solid waste• Do not take up much
space• Do not pose a risk of
polluting groundwater• Waste-to-energy plants
– Use heat to produce electricity
– Release some pollution into the air
– Some waste still remains
– More expensive to build
Recycling
• Biodegradable– A substance that can
be broken down and recycled by bacteria
Recycling
• Metals– Iron and aluminum can
be melted and reused
• Glass– Melted to make new
glass containers, fiberglass, bricks, tiles and reflective paints
Recycling
• Paper– Pulp is a thick liquid
made from wood, and recycled paper can be turned into pulp, also
• Plastic– Made from resins left
over from petroleum products
– Can be heated, stretched, and molded into plastic products
Solid Waste Management
• Reduce
• Reuse
• Recycle