Unit 3: Solid Wastes - Incineration, Encapsulation and Vitrification
- Created by: rosieevie
- Created on: 12-04-15 13:31
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- Disposing of Solid Waste
- Incineration
- Reduces volume of waste for final disposal
- Flammable materials burnt in purpose-built power stations (refuse-derived fuel)
- CFCs removed by water spray 'scrubber' - water neutralised by lime
- Chlorinated organic compounds produce dioxins - minimised by incinerating above 1000'C
- Heavy metals removed by scrubbing and stored in high pH for insolubility
- High air flow to reduce smoke production
- Wet scrubbing removes flue gases (SO2)
- Encapsulation - sealing waste in solid material to prevent its escape
- Vitrification -encapsulating high level radioactive waste
- Powdered radioactive waste mixed with molten glass
- If glass shatters waste will still be in the fragments
- Glass enclosed in sealed stainless-steel containers placed in cylindrical passages in a concrete building
- Incineration
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