Method of removing macromolecular organic dissolved and colloida

Details Method of removing macromolecular organic dissolved and colloida Method of removing macromolecular organic dissolved and colloida

1987-11-18

1989-06-27

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 38, 162 39, 210713, 210724, 210726, 210928, C02F 158, D21C 1100

Patent

active

048426881

ABSTRACT:
A method of removing macromolecular organic dissolved and colloidal compounds from the effluents of a paper and cellulose mill by using waste sludge containing fibers and chemicals. The sludge is acidified to a pH of approx. 2 by a mineral acid prior to adding into the effluent. Organic material is precipitated with fibers in a sedimentation vessel at a pH of 4.5-6.

REFERENCES:
patent: 3531370 (1970-09-01), Gould
patent: 3627679 (1971-12-01), Fuller
patent: 4179329 (1979-12-01), Svarz
patent: 4490257 (1984-12-01), Becker
Rydholm, "Pulping Processes"; Interscience Pub., New York, Sep. 1967, p. 849.
Forsell, "New Method of Fiber Recovery from Pulp & Paper Waste Sludge", Paper Trade Journal, Mar. 8, 1971 (162-190).
Water Treatment Handbook, pp. 24-32.

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