Absorptive sludge dewatering process for papermaking waste
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United States of America Patent
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-
Oct 8, 1996
Grant Date -
N/A
app pub date -
Jan 13, 1995
filing date -
Jan 13, 1995
priority date (Note) -
Expired
status (Latency Note)
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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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