Effect of the addition of inorganic flocculants on the activated sludge in a SBR system
QIAN Yu-lan1, LI Yan1, QIAO Liang2, LI Ying-xue3
1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China;
2. School of Environment Science and Engineering, Yancheng Institute of Technology, Yancheng 224003, China;
3. Safety and Environmental Protection Department, Xuzhou Heavy Machinery Corporation, Limited., Xuzhou 221001, China
This study explored the addition of two inorganic flocculants, polyaluminum chloride (PAC) and polyferric chloride (PFC), to the activated sludge in a SBR system. The influences on the sludge shape, floc size, sedimentation performance, biomass, EPS component, microbial activity and diversity were systematically investigated. The results showed that sludge floc were both more compact and marginalized after addition of these two inorganic flocculants. The floc median particle size respectively increased by 34.78% and 12.90% after addition of PAC and PFC.However,the sludge sedimentation performance and sludge activity deteriorated due to the accumulation of PAC and PFC. It was also found that the addition of inorganic flocculants had reduced the microbial activity and diversity, hence deceased the EPS secreted by microorganisms.
钱玉兰, 李燕, 乔椋, 李莹雪. 无机絮凝剂对SBR系统中活性污泥的影响研究[J]. 中国环境科学, 2020, 40(6): 2445-2453.
QIAN Yu-lan, LI Yan, QIAO Liang, LI Ying-xue. Effect of the addition of inorganic flocculants on the activated sludge in a SBR system. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2445-2453.
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