Sewage sludge dewatering process

Details Sewage sludge dewatering process Sewage sludge dewatering process

1988-11-09

1990-03-06

Sever, Frank

Liquid purification or separation

Processes

Separating

210774, 210781, 210787, 210804, 210806, B01D 1700, B01D 17038

Patent

active

049063880

ABSTRACT:
Solid organic substrates, such as sewage sludge, peat, and biomass, are dewatered in a three-stage process comprising mechanical dewatering of the substrate, followed by combination of the dewatered substrate with an organic solvent, followed by removal of the water-solvent mixture. The dried product is a granular, free-flowing substance suitable for incineration in relatively low-cost equipment. Conveniently, solvent will be recovered from the water-solvent mixture by conventional means, such as distillation, and recycled to the solvent mixing stage.

REFERENCES:
patent: 4065287 (1977-12-01), Roth

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