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MBT and thermal treatment of MSW residues: a comparative study of energy balance and long-term pollution potential of leachates

MBT consumes energy, whilst thermal treatment is a net exporter of energy. MBT is a net emitter of carbon dioxide whilst incineration is carbon neutral. The leachate and gas management burdens of MBT residuals are similar to those of untreated MSW. The low permeability of MBT residues make it unlikely that they could be flushed to reach Final Storage Quality (FSQ) within a sustainable period. The gas management burden of incineration residues is negligible. The long term leachate management burden of incinerator residuals is difficult to quantify and needs further study.

In order to comply with waste pre-treatment and waste diversion targets of the Landfill Directive, many communities in the EU are choosing mechanical biological treatment (MBT) in preference to thermal treatment. Increased adoption of MBT processes is likely to allow many EU Member States to comply with short, and possibly medium-term, requirements for biodegradable municipal waste diversion. It can also satisfy public acceptance criteria, unlike energy-from-waste schemes at many locations. There is evidence that MBT processes, even when undertaken in a relatively rudimentary manner, can significantly reduce gaseous emissions of carbon to atmosphere, when residues are landfilled, compared with untreated MSW. This is important, since most MBT residues from MSW treatment are certain to be disposed of by this route.

Copyright:	© IWWG International Waste Working Group
Quelle:	General Session B (Oktober 2007)
Seiten:	11
Preis:	€ 0,00
Autor:	Keith Knox Howard Robinson
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