It is rarely reported that the interaction between xenobiotics and algae may cause potential water quality risks and affect the drinking water treatment process. In the present study, a bench-scale jar test was performed to investigate the effects of the interaction between nitrobenzene (NB) and Microcystis aeruginosa on the performance of coagulation-sedimentation by comparing differences in turbidity, optical density at 680 nm (OD680), trihalomethane formation potential (THMFP) and microcystin-LR (MC-LR) in an M. aeruginosa solution with or without NB. The results indicated that the quality of M. aeruginosa-containing water can be improved significantly by coagulation-sedimentation, and all of the removal rates were more than 80%. The presence of NB did not affect the performance of coagulation-sedimentation directly. However, the interaction between NB and M. aeruginosa did change the characteristics of the raw water and affect the performance of coagulation-sedimentation. At a non-lethal concentration, NB did not inhibit the growth of M. aeruginosa but weakened the zeta potential of M. aeruginosa, which enhanced the removal of turbidity. The products of NB degradation by M. aeruginosa cause an increased THMFP in extracellular organic matters, which cannot be removed by coagulation-sedimentation efficiently, increasing the risk of disinfection by-products formation in the following disinfection unit.
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Research Article|October 31 2013
Effects of the interaction between Microcystis aeruginosa and nitrobenzene on coagulation-sedimentation performance
Zhiquan Liu
Zhiquan Liu
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China2Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan 70101, Taiwan
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Zhenling Hou
Zhenling Hou
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China3Changchun Institute of Urban Planning & Designing, Changchun 130021, China
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Hua Ma
Hua Ma
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China
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Zhenqiang Fan
Zhenqiang Fan
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China
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Zhiwei Zhao
Zhiwei Zhao
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China
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Dongmei Liu
Dongmei Liu
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China
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Fuyi Cui
Fuyi Cui
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), PO Box 2650, Harbin 150090, China
E-mail: hit_cuifuyi@hotmail.com
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Journal of Water Supply: Research and Technology-Aqua (2013) 63 (1): 58-65.
Article history
Received:
April 26 2013
Accepted:
September 20 2013
Citation
Zhiquan Liu, Zhenling Hou, Hua Ma, Zhenqiang Fan, Zhiwei Zhao, Dongmei Liu, Fuyi Cui; Effects of the interaction between Microcystis aeruginosa and nitrobenzene on coagulation-sedimentation performance. Journal of Water Supply: Research and Technology-Aqua 1 February 2014; 63 (1): 58–65. doi: https://doi.org/10.2166/aqua.2013.081
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