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Influence of filtration velocity on DON variation in BAF for micropolluted surface water treatment
Ma, Teng-Fei1; Chen, You-Peng1,2; Kang, Jia1; Gao, Xu2; Guo, Jin-Song2; Fang, Fang1; Zhang, Xiao-Tian3
2016-12-01
摘要Biological aerated filters (BAFs) are widely used for the treatment of micropolluted surface water. However, the biological process produces dissolved organic nitrogen (DON), which, as precursors of nitrogenous disinfection by-products, pose potential threats to drinking water safety. Therefore, to control DON in BAF effluent, it is necessary to study the influence of BAF operation parameters on DON production. In this study, the influence of filtration velocity in a BAF on DON production was investigated. Under different filtration velocity (0.5, 2, and 4 m/h) conditions, profiles of DON concentrations along the media layer were measured. The profile at a filtration velocity of 0.5 m/h showed a decreasing trend, and the ones under filtration velocities of 2 and 4 m/h fluctuated in a small range (from 0.1 to 0.4 mg/L). Moreover, the relatively high filtration velocities of 2 and 4 m/h resulted in a lower level of DON concentration. Additionally, 3D excitation-emission matrix fluorescence spectroscopy was used to characterize DON. It is found that the patterns of DON at a relatively high filtration velocity condition (4 m/h) were obviously different from the ones under low filtration velocity conditions (0.5 and 2 m/h).
关键词Dissolved organic nitrogen Micropolluted surface water Biological aerated filter Filtration velocity 3D excitation-emission matrix fluorescence spectroscopy Fluorescence regional integration technique
DOI10.1007/s11356-016-7578-0
发表期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
卷号23期号:23页码:23415-23421
通讯作者Chen, YP ; Fang, F (reprint author), Chongqing Univ, Key Lab Gorges Reservoir Reg Ecoenvironm MOE 3, Chongqing 400045, Peoples R China. ; Chen, YP (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm CAS, Chongqing 400714, Peoples R China.
收录类别SCI
WOS记录号WOS:000388601400007
语种英语