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5.5 SOLID DOMESTIC WASTE.  Domestic waste sources can be broken down into various categories:  sewage (treated and untreated)  run-off from roads,

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Presentation on theme: "5.5 SOLID DOMESTIC WASTE.  Domestic waste sources can be broken down into various categories:  sewage (treated and untreated)  run-off from roads,"— Presentation transcript:

1 5.5 SOLID DOMESTIC WASTE

2  Domestic waste sources can be broken down into various categories:  sewage (treated and untreated)  run-off from roads, lawns  landfill  air (incineration, cars)  paper, glass, metal, plastics, packaging  organic waste from the kitchen or garden  anything not related to industry

3  One well-established (but in some instances controversial) strategy for managing solid domestic waste such as paper waste, is recycling

4 vermicomposting

5

6 When compared with soil, worm casts also contain : 5times more nitrogen; 7times more phosphorus; 1.5times the calcium; 11times more potassium; 3times more exchangeable magnesium.

7 Comparison of recycling versus virgin paper production and incineration Area for comparison/ Process RecyclingVirgin Paper and Incineration Energy in the process Less (could be renewable)-25% more but could be renewable - incineration generates energy and replaces fossil fuels (toxin removal) Energy in transport More-less since it tends to be shorter distances but not always the case Pollution-toxins to landfill -CO 2 from transport supports forest growth - toxins to landfill - CO 2 from transport and emissions support forest growth -air and water pollution from pulp and paper other-inhibits attempts to use incineration as alternate energy source - what could be better forest management than to reduce the number of trees needed to be cut? - stimulates responsible forest management - inhibits attempts to improve energy efficiency

8 Domestic Waste Incinerator

9 Domestic Waste in a Landfill


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