Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
579152 | Journal of Hazardous Materials | 2011 | 6 Pages |
Abstract
In this study, chlorine dioxide (ClO2) instead of chlorine (Cl2) was proposed to minimize the formation of chlorine-based by-products and was incorporated into a sequencing batch reactor (SBR) for excess sludge reduction. The results showed that the sludge disintegrability of ClO2 was excellent. The waste activated sludge at an initial concentration of 15Â g MLSS/L was rapidly reduced by 36% using ClO2 doses of 10Â mg ClO2/g dry sludge which was much lower than that obtained using Cl2 based on similar sludge reduction efficiency. Maximum sludge disintegration was achieved at 10Â mg ClO2/g dry sludge for 40Â min. ClO2 oxidation can be successfully incorporated into a SBR for excess sludge reduction without significantly harming the bioreactor performance. The incorporation of ClO2 oxidation resulted in a 58% reduction in excess sludge production, and the quality of the effluent was not significantly affected.
Keywords
Related Topics
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Chemical Engineering
Chemical Health and Safety
Authors
Guanghua Wang, Jun Sui, Huishan Shen, Shukun Liang, Xiangming He, Minju Zhang, Yizhong Xie, Lingyun Li, Yongyou Hu,