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:
5.5 SOLID DOMESTIC WASTE
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
One well-established (but in some instances controversial) strategy for managing solid domestic waste such as paper waste, is recycling
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.
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