Absorptive sludge dewatering process for papermaking waste

Details Absorptive sludge dewatering process for papermaking waste Absorptive sludge dewatering process for papermaking waste

1995-01-13

1996-10-08

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

162189, 210609, 210721, 210769, 210771, 210778, 210928, 210205, C02F 152, C02F 1114

Patent

active

055628320

ABSTRACT:
Secondary sludge produced in the papermaking process is dewatered by adding a material capable of absorbing water together with dry fibers to the secondary sludge, and mixing the secondary sludge with the dried fibers to produce a modified secondary sludge which has sufficient structure and low enough moisture that it may be further dewatered by mechanical means. The preferred fiber adding materials are those readily produced in the papermaking process, particularly dry primary sludge, dried fines and bark and fly ash from boilers.

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"Benefication of Phosphate: Theory and Practice", SME 1993, pp. 429-446.

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