Process for treating waste water of paper-making

Process for treating waste water of paper-making

The treating process of papermaking waste water features that iron salt polymer, alkali matter and polaycrylamide in certain proportion are used as main material and added into papermaking waste water, so that the viscosity of papermaking black liquor is decreased, the molecular structure of paperma...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: CHENGSHAO ZHANG
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:The treating process of papermaking waste water features that iron salt polymer, alkali matter and polaycrylamide in certain proportion are used as main material and added into papermaking waste water, so that the viscosity of papermaking black liquor is decreased, the molecular structure of papermaking black liquor is broken, and the lignin, semi-cellulose, SiO2, etc. in papermaking black liquorare decomposed, deposited and separated. The process has the CODcr eliminating rate of the upper layer of water up to 80% and the lower layer deposit may be further dried in drying bed to form solid matter.