Effects of Influent pH on Papermaking Black Liquor Treatment with WAO Method

Abstract:

Papermaking black liquor was processed with WAO method，Chroma of papermaking black liquor water was 1,250,000 times and COD concentration was7028 mg/L. Effects of influent pH on its treatment were researched. The CODCr, absorbance, turbidity and pH of effluent water were determined. COD removal, decolorization removal, turbidity removal were analyzed. The results showed that: treatment effects gradually weakened with the increase of influent pH in the treatment of papermaking black liquor with WAO method. Influent pH was in between 3.0 to 7.0 appropriate. When papermaking black liquor was processed by wet air oxidation after, COD removal, decolorization and turbidity removal basically improved with the extension of time, reaction time set at 60 min was appropriate.

• Periodical: Applied Mechanics and Materials (Volumes 260-261)
• Pages: 1257-1262
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.260-261.1257
• Online since: December 2012
• Authors: Yong Min Liu, Ce Shi, Ling Ling Shang
• Keywords: COD Removal, Decolorization, Influent pH Value, Papermaking Black Liquor, Turbidity Removal, WAO Method

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