The enhancement effect of polyethylene (PE) surfaces modified with poly(lactic acid) (PLA) on formation of nitrifying biofilms in biological aerated filter (BAF) was investigated in this study. X-ray photoelectron spectroscopy, scanning electron microscope, and protein absorption analysis revealed that modified PE surfaces produced active groups, including carboxyl (O═C─O), hydroxyl (C─OH), and carbonyl (C═O), increased surface roughness, and enhanced the adsorption of both the bovine serum albumin and fibrinogen. During the startup period of 33 days, the average removal rates of ammonia nitrogen (NH3-H) were 68 and 72% before and after modification which were 36 and 43% for total nitrogen, 47 and 45% for total organic carbon. The results of denaturing gradient gel electrophoresis experiments demonstrated that modified carriers adsorbed and gathered more species of bacteria on surfaces. Thus, surface modification of PE suspended carrier by PLA improved the efficiency of reactor startup for drinking water treatment.
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Research Article|
November 19 2014
Improved efficiency of reactor startup in biological aerated filter by poly(lactic acid) Available to Purchase
Hui Feng;
Hui Feng
1School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Fu-yi Cui;
Fu-yi Cui
1School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Yi-zhong Xie;
Yi-zhong Xie
2GrandBlue Environment Co., Ltd, Foshan 528200, China and Guangdong Provincial Key Laboratory of Urban Water Cycle and Water Quality Security Technology, Foshan 528200, China
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Yan Wei;
Yan Wei
2GrandBlue Environment Co., Ltd, Foshan 528200, China and Guangdong Provincial Key Laboratory of Urban Water Cycle and Water Quality Security Technology, Foshan 528200, China
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Zhi-wei Zhao
1School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
E-mail: [email protected]
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Water Supply (2015) 15 (2): 348–355.
Article history
Received:
June 18 2014
Accepted:
November 06 2014
Citation
Hui Feng, Fu-yi Cui, Yi-zhong Xie, Yan Wei, Zhi-wei Zhao; Improved efficiency of reactor startup in biological aerated filter by poly(lactic acid). Water Supply 1 April 2015; 15 (2): 348–355. doi: https://doi.org/10.2166/ws.2014.120
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