Region’s Waste Challenge Waste arisings including Municipal Wastes.
WASTE any material that has no further value to its producer The Nature of Waste Ways of classifying...
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Transcript of WASTE any material that has no further value to its producer The Nature of Waste Ways of classifying...
WASTEany material that has no further value to its
producerThe Nature of Waste
Ways of classifying wastes:Solid wasteLiquid wasteGas wastesHazardous wasteBiomedical wasteSpecial waste (e-waste, radioactive…)
Why Do We Manage Wastes?wastes are not pleasing to the senses
in early days people threw all wastes (bodily and kitchen scraps) out windows into the street
Many diseases swept through Europe by rats and fleas living on this material.
modern waste management systems are aimed at sanitizing the waste to prevent the spreading of infectious diseases.
History of Waste Managementwaste wasn’t a problem when humans had low
pop’n densityas populations increased so did amount of
wasteMany diseases spread due to waste disposalBubonic Plague (Black Death) in Europe of the
1300’s was spread by a bacterium carried by fleas that lived on rats
spread easily since wastes that rats fed on were abundant
showed the need for waste managementThe Plague
Solid Wasteorganic materials (yard and gardent wastes,
kitchen waste, sewage)cars, furniture, plastics, all consumer
productsrecyclables that are not recycled or at end of
recycling cycle1/3 of all solid waste are mine tailings
produced by mining industryRoad building and construction debris is
another major component
Solid Wastes in Canada
Solid Waste in CanadaIn 2006 Canadians produced 40 million tons
of wasteyearly increase of 8 percent from 2004
Solid Waste by Typeex. Nanimo BC
Methods of Waste DisposalOpen Dumps:unregulated dumps where people drop their
garbageexposed to wind, rain, rats, insects etcmainly found in developing countriesoften people live in/around these scavenging
for recyclables they can sellusually forbidden in developed countriesYouTube - The people in the dump Smokey
Mountain, Manila 1
Landfillswaste disposal regulated and controlledlined with clay/plastic liner to control run offaway from waterways impermeable rock types chosenwaste compacted and covered daily with dirt
layer controls insects and rodentsdirt takes up 20% of spacecities running out of space in landfillsKingston closed East Landfill on Jan 1st HowStuffWorks Videos "Really Big Things:
America's Landfills"
Ocean Dumping25 000 tonnes of packaging/yr dumped at seaGreat Pacific Garbage Patch - floating ‘island’
size of Texas exists in Pacific due to ocean currents converging
Capt. Charles Moore on the seas of plastic | Video on TED.com
many ocean cities still dumping raw sewage into ocean
Victoria BC still dumping, Halifax stopped last year
Exporting Wastemany developed countries ship toxic waste to
developing countries with fewer environmental rules
e-waste commonly shipped to China, Cambodia & India
broken down over open fires with bare hands to get metals in electronics
many countries passing laws to stop shipping of hazardous wastes but still happens
The Wasteland - 60 Minutes - CBS News
Incinerationas landfills get full, burning waste becoming
more popularcommon throughout Europe, less used in
Canadasteam from burning captured used to create
electricity
ash and unburnables ~ 10% of original volume ash taken to landfills for disposalusually contains toxic materialsvery expensive ($100-300 million to build)tipping fees (dumping costs) higher than
landfillsemissions contain CO2 and toxins
Plasmagasification:waste is converted to syngas used for fuel in
engines rather than inceneratedlarge plant near OttawaPlasco Energy Group