PMS oxidation catalyzed by modified ceramic membrane for the treatment of secondary effluent
ZHU Ye1, ZHU Xiu-rong2, JIN Xin2, LI Ke-qian2, LIU Meng-wen1, WANG Gen1, JIN Peng-kang1,2, WANG Xiao-chang1
1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; 2. School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Abstract:In order to obtain high removal efficiency of dissolved organic matter from secondary effluent of wastewater treatment plant, two kinds of highly efficient permeable non-destructive catalytic ceramic membranes (N-C-CM, Fe/N-C-CM) made of carbon-based catalysts (N-C, Fe/N-C) were designed in this study, the in situ activated PMS filtration system using composite catalytic membrane was established, and the optimal operational conditions of composite catalytic membrane were also investigated. The results showed that at the optimal operational conditions (catalyst loading 0.15g, PMS dosage 15 mmol/L and pH 9), the removal efficiency of TOC, color and UV254in secondary effluent were 62.83%, 81.42% and 56.62%, turbidity is 0.00 NTU, respectively using Fe/N-C-CM activated PMS filtration system, which was generally higher than PMS direct oxidation combined with the original ceramic membrane (VCM) filtration and N-C-CM in situ activated PMS filtration system. By comparing the membrane specific flux, membrane fouling resistance distribution and membrane flux recovery rate of the three ceramic membranes after filtration of secondary effluent under the same conditions with or without PMS, it was further confirmed that Fe/N-C-CM in situ activated PMS filtration system can reduce the concentration of pollutants on the membrane surface, thus effectively alleviate membrane fouling. EPR analysis further proved that Fe/N-C-CM in situ activated PMS filtration system produced more SO4-·, ·OH and 1O2 than PMS direct oxidation combined with VCM filtration and N-C-CM in situ activated PMS filtration system.
朱烨, 朱秀荣, 金鑫, 李恪谦, 刘梦稳, 王根, 金鹏康, 王晓昌. 改性陶瓷膜催化PMS氧化的二级出水处理特性[J]. 中国环境科学, 2023, 43(4): 1706-1715.
ZHU Ye, ZHU Xiu-rong, JIN Xin, LI Ke-qian, LIU Meng-wen, WANG Gen, JIN Peng-kang, WANG Xiao-chang. PMS oxidation catalyzed by modified ceramic membrane for the treatment of secondary effluent. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(4): 1706-1715.
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