Analysis of sludge ozonation efficiency and its influencing factors in bubble column
JIANG Yi-feng1, HUANG Xiao-nan1, WANG Zhi-bin1, JIN Yun-zhen2
1. College of Environment, Zhejiang University of Technology, Hangzhou 310014, China;
2. Wenzhou Urban Management and Law Enforcement of Ouhai, Wenzhou 325006, China
In this context, a bubble column reactor was employed for sludge ozonation, where the effects of ozone concentration, sludge concentration and ozone dosage on sludge solubilization and organic release was investigated, respectively. The results showed that a high cell lysis rate was achieved but with an obvious mineralization of released COD, and it in consequence lowered the ozonation efficiency. Based on the response surface methodology, it revealed that there was interaction effects among the above influencing factors, and their respective order for sludge solubilization rate and COD release rate were:ozone concentration > sludge concentration > ozone dosage, and ozone concentration > ozone dosage > sludge concentration. Finally, the optimum operational conditions for sludge ozonation was obtained, by the related multiple quadratic regression model established and validated experimentally.
蒋轶锋, 黄晓楠, 王志彬, 金云珍. 鼓泡塔污泥臭氧化效率及影响因素分析[J]. 中国环境科学, 2017, 37(9): 3416-3422.
JIANG Yi-feng, HUANG Xiao-nan, WANG Zhi-bin, JIN Yun-zhen. Analysis of sludge ozonation efficiency and its influencing factors in bubble column. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(9): 3416-3422.
Bohler M, Siegrist H. Partial ozonation of activated sludge to reduce excess sludge, improve denitrification and control scumming and bulking[J]. Water Science & Technology, 2004, 49(10):41-49.
Song K., Choung Y, Ahn K, et al. Performance of membrane bioreactor system with sludge ozonation process for minimization of excess sludge production[J]. Desalination, 2003,157:353-359.