Research on optimal operation by a combined biological adsorption-MBR-Sulfur/Iron autotrophic denitrification process
ZHI Yao1, ZHANG Guang-sheng1,2,3, QIAN Kai1, LI Ji1,2,3, WANG Shuo1,2,3
1. School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China; 2. Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China; 3. Jiangsu College of Water Treatment Technology and Material Collaborative Innovation Center, Suzhou 215009, China
Abstract：In order to realize the effect of deep nitrogen and phosphorus removal, a combined biological adsorption-MBR-sulfur/iron autotrophic denitrification process was optimized, and the influence of HRT and volume ratio of sulfur-iron to nitrogen and phosphorus removal were both investigated. The experimental results showed that the optimal contaminants removal performance was achieved when the respective HRT of MBR and sulfur/iron autotrophic denitrification filter was 9h and 3h, and 63% of COD was adsorbed by biological adsorption process. The average effluent COD, NH4+-N, NO3--N and TN were 18.9, 0.36, 0 and 3.3mg/L, respectively, which was beneficial for deep nitrogen and phosphorus removal. In addition, the average effluent TP was as low as 0.29mg/L as the volume ratio of sulfur and iron was 3:1 in the sulfur/iron autotrophic denitrification filter. Most of nitrate was reduced in the region of 10 to 30cm height in the sulfur/iron autotrophic denitrification filter, and the corresponding nitrogen removal rate was 46.1gNO3--N/(m3×h). Furthermore, it was found that the membrane fouling could be effectively alleviated by providing intermittent suction to membrane module and high aeration rate to MBR process.
支尧, 张光生, 钱凯, 李激, 王硕. 生物吸附/MBR/硫铁自养反硝化组合工艺优化研究[J]. 中国环境科学, 2018, 38(6): 2097-2104.
ZHI Yao, ZHANG Guang-sheng, QIAN Kai, LI Ji, WANG Shuo. Research on optimal operation by a combined biological adsorption-MBR-Sulfur/Iron autotrophic denitrification process. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2097-2104.
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