长期运行的生物活性炭池失效风险评价  

Failure Risk Evaluation of Long-Term Operation for BAC Filter

作　　者：张孝洪 赖浩林 张可佳[2] 傅舟跃 ZHANG Xiaohong;LAI Haolin;ZHANG Kejia;FU Zhouyue(Zhoushan Water Supply Co.,Ltd.,Zhoushan 316021,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]舟山市自来水有限公司,浙江舟山316021 [2]浙江大学建筑工程学院,浙江杭州310058

出　　处：《净水技术》2022年第12期54-64,70,共12页Water Purification Technology

基　　金：国家自然科学基金(51978602,51778561)。

摘　　要：长期运行的生物活性炭池会出现处理效能下降甚至失效的风险。为了对长期运行的生物活性炭池的失效风险进行评价,选取Z市5座水厂作为研究对象,采用了荧光光谱分析和活性炭表征相结合的评价方法。结果表明,5座水厂活性炭吸附的有机物主要为小分子量有机物,当微生物代谢活动过强时可能导致生物活性炭池出水的微生物代谢产物和腐植酸类物质含量增加。变形菌门是5座水厂中最有优势的细菌门,除此之外,酸杆菌门、拟杆菌门、蓝藻门和绿弯菌门在水厂活性炭池中也有较多的分布。LC、PT、DB水厂中小粒度活性炭(<0.450 mm)占比较高,增加了活性炭粉化和破碎的风险,而且其剩余吸附容量也较低。研究结果表明,碘吸附值、BET比表面积和粒度分布是评价活性炭池失效风险的关键指标。当生物活性炭池运行超过7年后,存在失效的风险增大。Long-term operation for biological activated carbon(BAC) filter fosters the risk of decreasing treatment performance or even failure. In order to evaluate the failure risk of BAC filters, five water treatment plants(WTPs) in Z City were selected for the study using an evaluation method which combined fluorescent spectra analysis and activated carbon characterization. Results showed that the organic matters adsorbed by BAC in the five WTPs were mainly small molecular weight organic matter. Microbial metabolites and humic acid like substances in the BAC filter effluent might increase when the microbial metabolic activity was too strong. The most dominant bacterial phylum in five WTPs was Proteobacteria. In addition, Acidobacteria, Bacteroidetes, Cyanobacteria and Chloroflexi were also more distributed in BAC filters in five WTPs. LC, PT, DB WTPs had a high proportion of small particle size activated carbon(<0.450 mm), which increased the risk of powdering and crushing of activated carbon, and their residual adsorption capacity was also low. Results of the study turned out that iodine adsorption value, BET specific surface area and particle size distribution are key indices for evaluating the failure risk of activated carbon filter. When the biological activated carbon filter has been operated for more than 7 years, the risk of failure will increase.

关 键 词：生物活性炭 长期运行 失效风险评价 碘吸附值 粒度分布 BET比表面积 

分 类 号：TU991[建筑科学—市政工程]