Treatment of pulp mill effluents

Details Treatment of pulp mill effluents Treatment of pulp mill effluents

1977-05-10

1979-05-22

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 23F, 162 29, B01D 1300, B01D 3100, D21C 1100

Patent

active

041558456

ABSTRACT:
Pulp mill effluents, particularly soda-containing treatment liquors, are subjected to a separatory treatment comprising a pre-treatment with flocculating agent in a sub-critical amount incapable of effecting flocculation, followed by an ultrafiltration of the pre-treated effluent.

REFERENCES:
patent: 3171803 (1965-03-01), Rice et al.
patent: 3472767 (1969-10-01), Lees
patent: 3516932 (1970-06-01), Hedrick et al.
patent: 3519558 (1970-07-01), Cooper et al.
patent: 3578587 (1971-05-01), Kemmer
patent: 3615024 (1971-10-01), Michaels
patent: 3639206 (1972-02-01), Spruill
patent: 4014787 (1977-03-01), Shorr
A. S. Michaels, "New Separation Technique for the CPI" Chemical Engineering Progress (vol. 64, No. 12) Dec. 1968, pp. 31-43.
Bailey, M. W. Solute Interactions in Ultrafiltration Treatment of Paper Mill Wastes, North Carolina State Univ. Ph. D. Thesis 1973.
Beder, Henry et al., Removal of Solutes from Mill Effluents by Reverse Osmosis Tappi, May 1970, vol. 53, No. 5.
Wiley, A. J. et al., Application of Reverse Osmosis to Processing of Spent Liquors from the Pulp and Paper Industry, Tappi, Sep. 1967, vol. 50 Hackh's Chemical Dictionary, 4th Edition, p. 616.

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