长期服役BAC滤池的有机物去除效能与运行优化  

Organic Compounds Removal Efficiency and Operational PerformanceOptimization of Long-Term In-Service BAC Filter

作　　者：张可佳[1,2,3] 赖浩林 岑程 周沛璇 张孝洪 傅舟跃 ZHANG Ke-jia;LAI Hao-lin;CEN Cheng;ZHOU Pei-xuan;ZHANG Xiao-hong;FU Zhou-yue(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology,Zhejiang University,Hangzhou 310058,China;Innovation Center of Yangtze River Delta,Zhejiang University,Jiashan 314100,China;Zhoushan Water Supply Co.,Ltd.,Zhoushan 316021,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]浙江大学浙江省饮用水安全与输配技术研究重点实验室,杭州310058 [3]浙江大学长三角智慧绿洲创新中心,浙江嘉善314100 [4]舟山市自来水有限公司,浙江舟山316021

出　　处：《长江科学院院报》2025年第4期87-96,共10页Journal of Changjiang River Scientific Research Institute

基　　金：浙江省自然科学基金项目(LR24E080003);国家重点研发计划项目(2022YFC3203601)。

摘　　要：生物活性炭(BAC)滤池长期服役存在有机物去除效能下降甚至失效的风险。为了探究长期服役BAC滤池的有机物去除效能并提出针对性的运行优化方案,选取了Z市LC水厂服役12 a的BAC滤池作为研究对象,采用总有机碳(Total Organic Carbon,TOC)去除效果对其运行性能进行分析,并从臭氧(Ozone,O_(3))投加量和反冲洗方式等角度探究优化方案。结果表明:LC水厂对于有机物的去除效果存在较大波动,失效的风险较高。生物降解是长期服役BAC滤池去除有机物的主要机制,其贡献率为67%,而吸附作用的贡献率仅为33%;当O_(3)投加量为0.36~0.52 mg O_(3)/mg TOC时,LC水厂BAC滤池的运行性能较优,过低、过高的O_(3)投加量均不利于长期服役BAC滤池运行性能的提高;LC水厂表层和中上层BAC在反冲洗前均存在出水TOC升高的现象,使用含0.5 mg/L有效氯的水进行反冲洗有助于改善长期服役BAC滤池的运行性能。Biological activated carbon(BAC)filters that have been in service for an extended period(over 7 years)may encounter a decline or even a complete loss in the removal efficiency of organic compounds.To investigate the removal efficiency of organic compounds in long-serving BAC filters and propose targeted operational optimization strategies,we selected a 12-year-old BAC filter at the LC water treatment plant(WTP)in City Z as our research subject.We analyzed its operational performance by evaluating the total organic carbon(TOC)removal efficiency and explored optimization strategies from the aspects of ozone(O_(3))dosage and backwashing methods.The results revealed that the LC WTP experienced significant fluctuations in the organic compound removal efficiency,with a high risk of ineffectiveness.Biodegradation is the primary mechanism for organic compound removal in long-serving BAC filters,accounting for approximately 67%,while adsorption only contributes 33%.When the specific O_(3)dosage ranged from 0.36 to 0.52 mg O_(3)/mg TOC,the BAC filter at the LC WTP performed relatively well.Either too low or too high O_(3)dosage was unfavorable for enhancing the performance of long-serving BAC filters.At the LC WTP,the TOC levels in the effluent from both the surface and upper layers of the BAC filter increased before backwashing.Backwashing with water containing 0.5 mg/L of effective chlorine can improve the performance of long-serving BAC filters.

关 键 词：生物活性炭滤池 长期服役 有机物 去除效能 总有机碳 臭氧投加量 反冲洗方式 运行性能 优化方案 

分 类 号：TU991[建筑科学—市政工程]