Dewatering of sludges

Details Dewatering of sludges Dewatering of sludges

1998-12-29

2000-09-26

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

162189, 210728, 210729, 210732, 210928, 210919, C02F 1114

Patent

active

061238562

ABSTRACT:
A sludge, preferably derived at least in part from a paper mill, pulp mill or deinking plant, and which contains at least secondary sludge or primary sludge comprising deinking waste, recycled paper waste or mechanical pulping waste, is flocculated by being mixed with a phenolic material and a polyalkylene oxide and is then subjected to dewatering.

REFERENCES:
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patent: 5178770 (1993-01-01), Chung
patent: 5230808 (1993-07-01), Chung et al.
patent: 5354479 (1994-10-01), Wretborn et al.
patent: 5437791 (1995-08-01), Goransson et al.
patent: 5538596 (1996-07-01), Satterfield et al.
patent: 5601725 (1997-02-01), Chung et al.
patent: 5681480 (1997-10-01), Langley et al.
Derwent Abstr. 88-210940 for SE 8604975-6.
Derwent Abstr. 99-082212.

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