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Solid Domestic Waste

Solid Domestic Waste. Objectives: Outline the types of solid domestic waste Describe and evaluate pollution management strategies for solid domestic waste. Domestic Waste. Waste is material which has no value to its producer.

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Solid Domestic Waste

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  1. Solid Domestic Waste Objectives: Outline the types of solid domestic waste Describe and evaluate pollution management strategies for solid domestic waste

  2. Domestic Waste • Waste is material which has no value to its producer. • Americans produce nearly 3 kg per capita of waste per day. (according to the EPA)

  3. Domestic Waste • Include the following categories • Sewage • Run-off from roads and lawns • Landfill • Air (incineration) • Paper, glass, metal, plastics, packaging • Organic waste from kitchen • Anything not related to industry

  4. Types of Waste • Solid waste (paper, glass, plastics, metals) • Disease causing agents (bacteria, viruses) • Oxygen demanding waste (BOD) • Water soluble inorganic chemicals (acids, salts, mercury, lead) • Inorganic plant nutrients (nitrates, phosphates) • Organic chemicals (oil, gasoline, cleaning products, pesticides) • Sediments (soil, silt) • Thermal pollution

  5. Pollution management strategies • Reduce • Reuse • Recycle

  6. Reduce • Use less!

  7. Reuse • Reusing means the product is not waste. • E.g. reusable water bottles, cloth grocery bags

  8. Recycle • Involves • Collecting • Separating • What ends up being recycled depends on economics • How valuable is the material? • Aluminum cans have a high cost of production so recycling is worthwhile economically. • A recycled aluminum can saves enough energy to run a TV for 3 hours!

  9. Disposal of Waste • If waste materials are not recycled or reused, there are 2 options • 1. landfill • 2. incineration

  10. Landfills • Main method of disposal • Waste is taken to a site and buried. • Hazardous waste can be buried along with everything else • What do you think would need to be considered when choosing a landfill site?

  11. MAPLE Valley landfill • Where your trash goes

  12. Landfills • Liners prevent leachate from seeping out

  13. How Many Years? • How long do you think these objects take to break down in a landfill? • Disposable diaper • 500-600 years • Cotton T-shirt • 6 months • Leather belt • 50 years • Styrofoam cup • 1 million years • Glass Bottle • 1 million years

  14. How Many Years • Plastic Bottle • 1 million years • Paper Bag • 2 months • Banana Peel • 1 month • Aluminum can • 500 years • Block of Wood • 10 years

  15. Incinerators • Burn waste at high temps up to 2000 ºC • Some incinerators are hooked up to turbines that create electricity • Called waste-to-heat energy incineration • Some incinerators don’t capture heat • Causes air pollution • Release of dioxins (plastics) • Heavy metals (batteries) Waste to heat energy incinerator in Italy

  16. Organic Waste • Composting • Can be used for fertilizers

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