Process for purifying waste water obtained by a papermaking proc

Details Process for purifying waste water obtained by a papermaking proc Process for purifying waste water obtained by a papermaking proc

1975-07-10

1978-11-28

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Reclamation, salvage or reuse of materials

162 55, D21F 182

Patent

active

041274407

ABSTRACT:
The waste water obtained from a papermaking process is purified to remove the last traces of fibers suspended in the water by mixing the waste water with those contaminating materials that are separated from the paper pulp suspension before it is fed to the papermaking machine. These contaminants act as a filter aid and make it possible to separate the fibers remaining in the water phase after the water from the papermaking machine has been subjected to a flocculating process, filtering and screening.

REFERENCES:
patent: 2765915 (1956-10-01), Nilsson
patent: 3235444 (1966-02-01), Kruger
patent: 3274103 (1966-09-01), Adams
patent: 3301745 (1967-01-01), Coppick et al.
patent: 3486619 (1969-12-01), Grundelius et al.
patent: 3486621 (1969-12-01), Hirs
patent: 3577339 (1971-05-01), Buird et al.
patent: 3912579 (1975-10-01), Braun

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