Process for purifying waste water obtained by a papermaking process

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 ac...

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Bibliographic Details
Main Author BARKMAN; LARS O
Format Patent
LanguageEnglish
Published 28.11.1978
Subjects
APPARATUS THEREFOR
CHEMISTRY
METALLURGY
METHODS OF PRODUCING PAPER THEREON
PAPER-MAKING
PAPER-MAKING MACHINES
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
SEPARATION
TEXTILES
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary: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.
Bibliography:Application Number: US19750594772