PROCESS FOR THE DECOLOURIZATION OF PULP MILL PROCESS STREAMS

PROCESS FOR THE DECOLOURIZATION OF PULP MILL PROCESS STREAMS

Pulp mill effluent streams having a pH greater than 7.0 are decolourized by reducing the acidity of the effluent to below pH 4.0 so that colour bodies are precipitated from the effluent. The effluent is filtered and organic compounds are absorbed from the filtrate on carbon particles which are regen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: BERRY, W. WES
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
METALLURGY
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:Pulp mill effluent streams having a pH greater than 7.0 are decolourized by reducing the acidity of the effluent to below pH 4.0 so that colour bodies are precipitated from the effluent. The effluent is filtered and organic compounds are absorbed from the filtrate on carbon particles which are regenerated by a caustic solution.