中文关键词臭氧生物活性炭(BAC)溶解性有机物微生物消毒副产物 英文关键词ozonebiological activated carbon (BAC)dissolved organic mattermicroorganismdisinfection by-products

作者	单位	E-mail
刘宝明	江南大学环境与土木工程学院, 无锡 214122	1341101718@qq.com
王夕希	江南大学环境与土木工程学院, 无锡 214122
张晓夏	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
阮文权	江南大学环境与土木工程学院, 无锡 214122 江苏省厌氧生物技术重点实验室, 无锡 214122 江苏省生物质能与减碳技术工程实验室, 无锡 214122
缪恒锋	江南大学环境与土木工程学院, 无锡 214122 江苏省生物质能与减碳技术工程实验室, 无锡 214122 江苏省水处理技术与材料协同创新中心, 苏州 215009	hfmiao@jiangnan.edu.cn
潘杨	江苏省水处理技术与材料协同创新中心, 苏州 215009

中文摘要 为探究饮用水处理过程中臭氧（O₃）对生物活性炭（BAC）中微生物及出水消毒副产物（DBPs）的影响，以饮用水小试装置的O₃-BAC工段开展研究，系统分析在不同O₃浓度下的水质变化，溶解性有机物（DOM）特征，微生物活性和DBPs产生情况.结果表明，O₃对BAC过滤的影响主要表现为提升微生物对DOM的利用效率，但O₃浓度过高会导致出水中蛋白质和微生物代谢产物（SMPs）等有机物增加.当O₃浓度从0 mg·L^-1提升到2.0 mg·L^-1时，BAC中微生物存活率从95.10%降至62.60%，但O₃将出水中难降解有机物转变为易生物降解物质，使得微生物活性提高了62.52%，BAC的生物过滤得到强化；当O₃浓度增加到4.0 mg·L^-1时，微生物存活率降至49.90%，同时微生物产生的蛋白质和SMPs增加，导致含碳消毒副产物（C-DBPs）和含氮消毒副产物（N-DBPs）的生成浓度与不通O₃相比分别上升41.93%和7.18%，大大增加水体潜在危险.综上，合适O₃浓度有利于O₃-BAC对DOM的去除，O₃浓度过高会导致BAC过滤效果变差并产生新的DBPs前体物. 英文摘要 This study was carried out in the ozone (O₃) and biological activated carbon (BAC) section of a drinking water plant to investigate the effects of O₃ on microbial and effluent disinfection by-products (DBPs) in BAC during drinking water treatment. The water quality, dissolved organic matter (DOM) characteristics, microbial activity, and DBPs formation at different O₃ concentrations were analyzed. Results showed that the effect of O₃ on microorganisms is mainly that it increased the utilization efficiency of DOM. However, excessive O₃ increased the amount of organic matter such as protein and microbial metabolites (SMPs) in the effluent. When the O₃ concentration increased from 0 mg·L^-1 to 2.0 mg·L^-1, the survival rate of microorganisms in the BAC decreased from 95.10% to 62.60%. However, since O₃ transforms organic matter into a biodegradable substance, we found that microbial activity increased by 62.52% and that the biofiltration of the BAC was enhanced. When the O₃ concentration was further increased to 4.0 mg·L^-1, the microbial survival rate decreased to 49.9% and the protein and SMPs produced by the microorganisms increased. This resulted in an increased formation of carbon-containing DBPs (C-DBPs) and nitrogen-containing DBPs (N-DBPs) by 41.93% and 7.18%, respectively. In summary, an appropriate dosage of O₃ was beneficial for removing DOM by O₃-BAC, but we found that an excessive O₃ concentration caused the formation of new DBPs precursors.

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