臭氧对PVDF膜抗污和组合工艺净水效能的提升作用  

Enhancement of Ozone on Anti-fouling Capability of PVDF Membrane and Water Purification Efficiency of Combined Process

作　　者：王晓 何海洋 朱洪涛[1] 陈凤祥 武贤智 吴慧峰 文湘华[2] WANG Xiao;HE Hai-yang;ZHU Hong-tao;CHEN Feng-xiang;WU Xian-zhi;WU Hui-feng;WEN Xiang-hua(College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China;School of Environment,Tsinghua University,Beijing 100084,China;Citic Environmental Technology Investment Co.Ltd.,Guangzhou 511457,China)

机构地区：[1]北京林业大学环境科学与工程学院,北京100083 [2]清华大学环境学院,北京100084 [3]中信环境技术投资有限公司,广东广州511457

出　　处：《中国给水排水》2025年第1期40-45,共6页China Water & Wastewater

基　　金：清华大学(环境学院)-中信环境技术投资有限公司先进膜水处理及资源化技术联合研究中心项目。

摘　　要：采用原位臭氧氧化结合PVDF膜,构建了O_(3)/PVDF/BAC组合工艺。基于臭氧对天然有机物(NOM)的氧化效能,该工艺在保持PVDF膜对NOM截留效果的同时,有效提高了其抗污染性能。在O_(3)/PVDF/BAC工艺中,PVDF膜的TMP/TMP_(0)在运行7.5 d后升至1.9,优于单独PVDF膜、亲水改性PVDF-OH膜和PVDF-PVP膜的抗污效果。此外,O_(3)/PVDF工艺对京密引水渠水中溶解性有机碳(DOC)和高锰酸盐指数(COD_(Mn))的去除率分别为11.02%和16.85%。由于臭氧对NOM的氧化分解作用,部分小分子NOM透过膜孔进入BAC单元,进一步增强了BAC内微生物和活性炭对NOM的去除能力,使O_(3)/PVDF/BAC工艺对DOC和COD_(Mn)的去除率分别达到37.12%和48.95%。运行结束后,O_(3)/PVDF/BAC工艺中的PVDF膜在接触角、泡点压力和断裂拉伸强度等方面未发生显著变化,表明原位臭氧氧化未加速PVDF膜的老化。综上,O_(3)/PVDF/BAC工艺展现出显著的协同效应,有效控制了PVDF膜的污染,并显著提高了净水效果。O_(3)/PVDF/BAC combined process was developed by integrating in-situ ozonation with a PVDF membrane.Leveraging ozone’s oxidation efficiency on natural organic matter(NOM),the process not only maintained the PVDF membrane’s NOM retention performance but also significantly enhanced its antifouling properties.In the O_(3)/PVDF/BAC process,the TMP/TMP_(0) of the PVDF membrane increased to 1.9 after 7.5 days of operation,outperforming the antifouling effects of the PVDF membrane,hydrophilic-modified PVDF-OH membrane,and PVDF-PVP membrane.Additionally,the O_(3)/PVDF process achieved removal rates of 11.02% for dissolved organic carbon(DOC)and 16.85%for the permanganate index(CODMn)in water from the Jingmi Diversion Channel.Due to ozone’s oxidative decomposition of NOM,some small-molecule NOM passed through the membrane pores and entered the BAC unit,further enhancing the microbial and activated carbon degradation capacity for NOM.This resulted in overall DOC and CODMn removal rates of 37.12%and 48.95%,respectively,in the O_(3)/PVDF/BAC process.Furthermore,after the operation,no significant changes were observed in the contact angle,bubble point pressure,or tensile strength of the PVDF membrane,indicating that ozonation did not accelerate the aging of the PVDF membrane.The O_(3)/PVDF/BAC process demonstrated a significant synergistic effect,effectively controlling membrane fouling and markedly improving water purification efficiency.

关 键 词：原位臭氧氧化 PVDF膜 生物活性炭 膜污染 净水效能 

分 类 号：TU991[建筑科学—市政工程]