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Lecture

ENSC 1005 Lecture Notes - Organochloride, Workplace Hazardous Materials Information System, Cycle Basis


Department
Child and Family Studies
Course Code
ENSC 1005
Professor
Heather Kaye

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Monday February 25, 2013
Wastes
Solid waste unwanted or discarded material that is not a liquid or has
- Symptom of unnecessary waste of resources
- Production of solid waste causes pollution and environmental degradation
- North America produces about 1/3 of the world’s solid waste -> symptom of
affluenza
- 98.5% of solid waste produces indirectly to provide goods and services to meet
needs and wants of consumers (mining, oil & natural gas production, agriculture,
sewage sludge and industrial activities)
- Remaining 1.5% of solid waste is municipal solid waste (MSW) or garbage
- Paper products and organic matter make up most of the MSW in Canada
- Electronic waste or e-waste (discarded TV sets, cellphones, computers) is the
fastest growing solid waste problem in Canada
Producing Less Waste & Pollution
Options:
1) Waste management high waste approach
- Manages wastes in ways to decrease environmental impact (i.e. bury or
burn)
2) Waste reduction/pollution prevention low waste approach
- There is no “away” to prevent problems from occurring
- Solid waste is viewed as a potential resource hat we should reuse, recycle or
compost
- This option: 1) Saves energy
2) Saves resources
3) Reduces environmental impact
4) Decreases pollution control and waste management costs
and future costs for toxic & hazardous materials
5) Improves worker health & safety
6) Less costly on life cycle basis
- Classified according to 5 R’s: Refuse, Reduce, Reuse, Recycle, Rethink, also Recover
(industries retain materials that would otherwise be wasted)
Solutions: see FIG. 24.4, p.569
Methods to Reduce Waste & Pollution (Sustainability Six)
1) Decrease consumption “do I need it”
2) Decrease material & energy to make product
3) Redesign manufacturing process product less waste and pollution
4) “Green design” and life cycle assessment in developing product
5) Increase product durability
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