Sewage sludge disposal process and product

C - Chemistry – Metallurgy – 10 – L

Patent

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Details

C10L 5/46 (2006.01) C02F 11/12 (2006.01) C10L 5/14 (2006.01) C10L 5/40 (2006.01)

Patent

CA 2209578

Briquettes useful as fuel are produced from dehydrated sewage sludge containing 65 weight percent or more sewage sludge solids. The briquettes on a dry basis contain from about 50 to about 95 weight percent sewage sludge solids together with from about 3 to about 12 weight percent lime as binder and fungistat. Organic binders and coking agents may be included in the briquettes to improve resistance to breakage and to impart high crush strength at elevated temperatures encountered in gasifiers.

Briquettes utilisées comme combustible fabriquées à partir de boues d'épuration déshydratées. Elles renferment 65 % en poids ou plus de solides de boues d'épuration. Lorsqu'elles sont sèches, les briquettes contiennent approximativement de 50 à 95 % de solides de boues d'épuration ainsi qu'approximativement 3 à 12 % en poids de chaux servant de liant et de fongistatique. Les briquettes peuvent contenir des agents de cokéfaction afin d'augmenter leur résistance à la fragmentation et pour leur conférer une importante cohésion aux températures élevées propres aux gazéifieurs.

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