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Waste Incinerators

Waste Incinerators. Sandi Dewberry. Renewable Resources. Can be replenished fairly rapidly through natural processes as long as it is not used up faster than it is replaced Forests, grasslands, wild animals, fresh water, fresh air, and fertile soil. Nonrenewable Resources.

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Waste Incinerators

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  1. Waste Incinerators Sandi Dewberry

  2. Renewable Resources • Can be replenished fairly rapidly through natural processes as long as it is not used up faster than it is replaced • Forests, grasslands, wild animals, fresh water, fresh air, and fertile soil

  3. Nonrenewable Resources • Exist in a fixed quantity or stock in the earth’s crust • On a time scale of millions to billions of years, geological processes can renew such resources • Humans don’t have that kind of time • Depleted much faster than they are formed as a result of exponential growth in our resource use

  4. Incineration - What is it? • A process in which many types of hazardous wastes are heated to high temperatures (up to 2,000⁰C/3,600⁰F) to break them down and convert them to less harmful chemicals or harmless chemicals such as carbon dioxide and water

  5. Incineration – How does it work?

  6. How does it work? (Cont.)

  7. Incineration - Who does it? • Japan and a few European countries incinerate most of their municipal solid waste.

  8. Advantages vs. Disadvantages Disadvantages • Expensive to build • Costs more than short-distance hauling to landfills • Difficult to site because of citizen opposition • Some air pollution • Older or poorly managed facilities can release large amounts of air pollution • Output approach that encourages waste production • Can compete with recycling for burnable materials such as newspaper Advantages • Reduces trash volume • Less need for landfills • Low water pollution • Concentrates hazardous substances into ash for burial or use as landfill cover • Sale of energy reduces cost • Modern controls reduce air pollution • Some facilities recover and sell metals

  9. More Disadvantages? • Produces highly toxic ash • Must be safely and permanently stored in a landfill especially designed for hazardous waste

  10. Perfect Incineration • Ideally, incinerators do not cause problems to the health of the plant workers, environment, or the public.

  11. Incineration-Related Vocabulary • Biomass – a diverse source of energy that consists of organic plant materials (such as wood and agricultural waste) and animal wastes that can be burned directly as a solid fuel or converted into gaseous or liquid biofuels

  12. 5 Question Quiz • What temperature might incinerators reach? • Give an example of a country that also uses incineration. • Name one benefit of incinerators. • Name one drawback of incinerators. • Ideally doesn’t cause problems to the health of ______, _______, or _______.

  13. Incinerator in Huntsville • http://www.swdahsv.org/wtoe.html

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