solid waste

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Post on 12-Nov-2014




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Solid waste notes


  • 1. Solid WasteAny discarded material that isnot liquid or gas (junk mail,coffee grounds, junked cars,etc.)* about 6 pound/person /day

2. Where does our trash go?In 2007 almost 65% of thesolid wastes produced inU.S. went to 2,500 sanitarylandfills. 3. Sanitary Landfills waste disposal facility where wastes are put in the ground and covered each day with a layer of soil.* Saferthan open dumps (habitat for obnoxious smell, flies & Rats). 4. Leachate liquids that drain fromlandfill. Contains dissolvedchemicals from decomposinggarbage. leachate can get into ground water,making nearby wells unsafe. 5. . Methane Gas is formed whenwastes decompose withoutoxygen. can seep through ground andinto basements of nearbyhomes: one spark can blow up ahouse. 6. NIMBY not in my backyardattitude makes it difficult to findlandfill sites. Finding acceptable locations clay soils, stable bedrock, farfrom aquifer. 7. EPA Regulations for landfills effective 1993synthetic or clay liners collecting and treating leachate monitoring for escaping methanegas ( install vent pipes for escapinggas)Monitor ground and surface water 8. Sanitary Landfill Design 9. Incinerators burn trash17% of trash is burned inU.S.Japan and Switzerland burnmore than 50% of their trash. 10. Advantages of Burning TrashReduces the volume of wasteby 90% Provides energy Waste toenergy plants burn wastes toproduce steam for electricity. 11. Disadvantages of Burning Trash: Polluting gases ( carcinogens) Ash Disposal ( may contain heavy metals which are hazardous wastes, Ex. cadmium, mercury, lead)


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