刘宝明,王夕希,顾艳芳,李雨平,姜莹莹,阮文权,缪恒锋.臭氧耦合陶瓷膜过滤对膜性能及出水消毒副产物的影响[J].环境科学学报,2020,40(9):3224-3232
臭氧耦合陶瓷膜过滤对膜性能及出水消毒副产物的影响
- Membrane filtration performance and characteristics of effluent disinfection by-products during ozone-ceramic membrane filtration
- 基金项目：江苏省环境科学与工程重点实验室开放基金项目（No.Zd20170X）
- 刘宝明
- 江南大学环境与土木工程学院, 无锡 214122
- 王夕希
- 江南大学环境与土木工程学院, 无锡 214122
- 顾艳芳
- 江南大学环境与土木工程学院, 无锡 214122
- 李雨平
- 江南大学环境与土木工程学院, 无锡 214122
- 姜莹莹
- 江南大学环境与土木工程学院, 无锡 214122
- 阮文权
- 1. 江南大学环境与土木工程学院, 无锡 214122;2. 江苏省厌氧生物技术重点实验室, 无锡 214122;3. 江苏省生物质能与减碳技术工程实验室, 无锡 214122
- 缪恒锋
- 1. 江南大学环境与土木工程学院, 无锡 214122;2. 江苏省生物质能与减碳技术工程实验室, 无锡 214122;3. 江苏省水处理技术与材料协同创新中心, 苏州 215009
- 摘要：利用臭氧（O3）-陶瓷膜过滤（CMF）处理常规工艺出水，研究了不同O3-CMF耦合方式对膜性能和消毒副产物（DBPs）的影响.结果表明，与单独CMF相比，异位O3-CMF和原位O3-CMF均可以有效缓解膜污染，原位O3-CMF控制效果最佳.异位O3-CMF对进水（常规工艺出水） DOC去除率（26.25%）略高于原位O3-CMF（22.31%），但是其SUVA去除率（83.91%）明显低于原位O3-CMF（93.10%）.羟基自由基（·OH）生成特征表明原位O3-CMF可促进O3产生更多的·OH.在O3、·OH氧化和陶瓷膜截留协同作用下，异位O3-CMF和原位O3-CMF出水中总荧光响应强度和相对分子质量大于0.3×103，有机物含量降低，进而使得出水中含碳消毒副产物（C-DBPs）生成量分别降低了21.86%和32.35%，含氮消毒副产物（N-DBPs）生成量分别降低了16.16%和19.13%.但O3和·OH氧化后生成的小分子有机物因难以被CM截留导致其在出水中含量增加，进而增加了卤代酮（HKs）、水合氯醛（CH）和三卤硝基甲烷（THNMs）的产生.本研究对于不同O3-CMF方式下O3与CM的协同机制的探讨，改善膜性能和提升DBPs前体物的去除具有一定指导意义.
- Abstract：Ozone (O3)-ceramic membrane filtration (CMF) technology was applied in this investigation for drinking water treatment. The membrane filtration performance and disinfection by-products (DBPs) formation in effluent of combination process of O3 with ceramic membranes (CM) were investigated. Results showed that both ex-situ and in-situ O3-CMF could effectively alleviate membrane fouling, and in-situ O3-CMF achieved the best control effect. Ex-situ O3-CMF revealed superior DOC removal with higher efficiency of 26.25% than in-situ O3-CMF (22.31%), while ex-situ O3-CMF had much lower SUVA removal rate (83.91%) than in-situ O3-CMF (93.10%). Hydroxyl radical (·OH) generation could be promoted with in-situ O3-CMF. O3-CMF could effectively reduce the total fluorescence response intensity and high molecular weight (the relative molecular mass > 0.3×103) organic matters, resulting in the decrease of carbonaceous DBPs and nitrogenous DBPs formation by 21.86% and 16.16% in the ex-situ O3-CMF effluent, as well as 32.35% and 19.13% in the in-situ O3-CMF effluent respectively. However, the oxidation of O3 and·OH would lead to the formation of low molecular organic compounds which were ineffectively retained by CM, resulting in an increase of halogenated ketones, chloral hydrates and trihalomomethanes formation. Exploration of the synergistic effect of O3 and CM under different modes in this investigation is of practical importance for the membrane performance improvement and DBP precursors removal.
