臭氧-生物活性炭工艺对典型藻源致嗅物质的应急处置效能  

Performance of O_(3)-BAC Process for Emergency Removal of Typical Algal Source Olfactory Substances

作　　者：叶子莹 刘成[1,2] YE Ziying;LIU Cheng(Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China;College of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]河海大学环境学院,江苏南京210098

出　　处：《净水技术》2022年第12期131-136,共6页Water Purification Technology

基　　金：国家水体污染控制与治理科技重大专项(2012X07403-001)。

摘　　要：利用小试试验和实际水厂调研结果,研究了臭氧-生物活性炭(O_(3)-BAC)工艺应对典型藻源致嗅物质——2-甲基异莰醇(2-MIB)突发污染的处理效能,探讨了该工艺对水厂应对突发污染能力的提升作用。研究结果表明,O_(3)氧化可有效去除水中2-MIB,实际水厂设计条件下去除率可达到90%以上,其去除效果与O_(3)投加量和氧化时间直接相关。BAC单元通过吸附和生物降解作用有效去除水中的2-MIB,去除率可达90%以上,其去除效果与活性炭使用年限及过水流速有关。O_(3)-BAC工艺整体改善了出水水质,并可以有效提升水厂应对2-MIB的能力,其最大应对质量浓度在1 000 ng/L以上,对2-MIB的去除率高于99%。但在实际应用中,需要注意在应急处理后活性炭可能出现的污染物持续释放问题以及活性炭的适当使用年限。Based on the results of lab-scale experiment and actual water treatment plant(WTP) investigation, the efficiency of ozone-biological activated carbon(O_(3)-BAC) process to deal with typical algae-derived odorous substances(2-methylisoborneol, 2-MIB) was studied, and the promote effect of this process on the ability of WTP to cope with sudden pollution was discussed. The results showed that O_(3) oxidation could effectively remove 2-MIB in water, and the removal rate could reach more than 90% under the design conditions of actual WTP. The removal effect was directly related to Odosage and oxidation time. The BAC unit could effectively remove 2-MIB in water through adsorption and biodegradation, and the removal rate could reach more than 90%. The removal effect was related to the service year of activated carbon and the flow velocity of water. O_(3)-BAC process improved the treated water quality, and could effectively improve the ability of the WTP to cope with 2-MIB. The maximum response mass concentration was above 1 000 ng/L, and the removal rate of 2-MIB was higher than 99%. However, in practical application, attention should be paid to the continuous release of pollutants that may occur in activated carbon after emergency treatment and the appropriate service year of activated carbon.

关 键 词：臭氧-生物活性炭(O_(3)-BAC) 饮用水 突发污染 应急处理 2-甲基异莰醇 

分 类 号：TU991[建筑科学—市政工程]