Carbonaceous and nitrogenous disinfection byproduct precursor variation during the reversed anaerobic–anoxic–oxic process of a sewage treatment plant |
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作者姓名: | Huihui Han Hengfeng Miao Yajing Zhang Minfeng Lu Zhenxing Huang Wenquan Ruan Huihui Han Hengfeng Miao Yajing Zhang Minfeng Lu Zhenxing Huang Wenquan Ruan |
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作者单位: | School of Environmental & Civil Engineering, Jiangnan University, Wuxi 214122, China,1 School of Environmental & Civil Engineering, Jiangnan University, Wuxi 214122, China;2 Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China ;3 Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, China,School of Environmental & Civil Engineering, Jiangnan University, Wuxi 214122, China,School of Environmental & Civil Engineering, Jiangnan University, Wuxi 214122, China,1 School of Environmental & Civil Engineering, Jiangnan University, Wuxi 214122, China;2 Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China ;3 Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, China and 1 School of Environmental & Civil Engineering, Jiangnan University, Wuxi 214122, China;2 Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China ;3 Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, China |
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摘 要: | Disinfection byproduct(DBP)precursors in wastewater during the reversed anaerobic–anoxic–oxic(A~2/O)process,as well as their molecular weight(MW)and polarity-based fractions,were characterized with UV scanning,fluorescence excitation emission matrix,Fourier transform infrared and nuclear magnetic resonance spectroscopy.Their DBP formation potentials(DBPFPs)after chlorination were further tested.Results indicated that the reversed A~2/O process could not only effectively remove the dissolved organic carbon(DOC)and dissolved total nitrogen in the wastewater,but also affect the MW distribution and hydrophilic–hydrophobic properties of dissolved organic matter(DOM).The accumulation of low MW and hydrophobic(HPO)DOM was possibly due to the formation of soluble microbial product-like(SMP-like)matters in the reversed A~2/O treatment,especially in the anoxic and aerobic processes.Moreover,DOM in the wastewater displayed a high carbonaceous disinfection byproduct formation potential(C-DBPFP)in the fractions of MW100 k Da and MW5 k Da,and revealed an increasing tendency of nitrogenous disinfection byproduct formation potential(N-DBPFP)with decrease of MW.For polarity-based fractions,the HPO fraction of wastewater showed significantly higher C-DBPFP and N-DBPFP than hydrophilic and transphilic fractions.Therefore,although the reversed A~2/O process could remove most DBP precursors by DOC reduction,it led to the enhancement of DBPFP with the formation and accumulation of low MW and HPO DOM.In addition,strong correlations between C-DBPFPs and SUVA,and between N-DBPFPs and DON/DOC,were observed in the wastewater,which might be helpful for DBPFP prediction in wastewater and reclaimed water chlorination.
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关 键 词: | Dissolved organic matter Reversed anaerobic–anoxic–oxic process Disinfection byproducts Chlorination Molecular weight Hydrophobic |
收稿时间: | 2016/11/24 0:00:00 |
修稿时间: | 2016/6/20 0:00:00 |
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