预氧化联合PAC强化混凝沉淀去除引滦水中2-MIB  

Pre‑oxidation Combined with Powdered Activated Carbon Enhanced Coagulation-Sedimentation for Removal of 2‑Methylisoborneol in Water from Luanhe Diversion Project

作　　者：苏晓 韩宏大 胡建坤 韩正双[2] 李荣 SU Xiao;HAN Hong‑da;HU Jian‑kun;HAN Zheng‑shuang;LI Rong(Tianjin Water Group Co.Ltd.,Tianjin 300042,China;Tianjin Public Utility Design&Research Institute,Tianjin 300100,China)

机构地区：[1]天津水务集团有限公司,天津300042 [2]天津市公用事业设计研究所,天津300100

出　　处：《中国给水排水》2023年第21期27-33,共7页China Water & Wastewater

基　　金：中国博士后科学基金资助项目(2020M670671);天津水务集团有限公司科技项目(2019KY-03)。

摘　　要：针对天津市引滦水中2-甲基异莰醇(2-MIB)超标引起的水源水嗅味问题,开展了常规混凝沉淀、氧化、粉末活性炭(PAC)吸附以及预氧化联合PAC强化混凝沉淀工艺去除引滦水中2-MIB的研究。结果表明,混凝沉淀、氧化、PAC吸附对不同形态的2-MIB有不同的作用效果,但这3种单一技术并不能有效去除水中的2-MIB;NaClO/KMnO_(4)/O_(3)+PAC+混凝沉淀组合工艺对引滦水中的2-MIB均有较好的去除效果,其中O_(3)+PAC+混凝沉淀组合工艺的处理效果最佳。另外,结合现场实际情况,开展了NaClO与PAC联用技术的实际应用研究,发现NaClO+PAC+PAC(PAC分两点投加)对2-MIB有很好的去除效果,保证了天津市冬季引滦供水安全运行,可以为后续应对引滦水中2-MIB污染提供借鉴。The conventional coagulation-sedimentation,oxidation,powdered activated carbon(PAC)adsorption and pre‑oxidation combined with PAC enhanced coagulation-sedimentation were employed for the removal of 2‑methylisoborneol(2‑MIB)in water from Luanhe Diversion Project in Tianjin,so as to solve the odor problem caused by excessive 2‑MIB in water.Coagulation-sedimentation,oxidation and PAC adsorption showed different removal effect for different forms of 2‑MIB,but 2‑MIB could not be effectively removed by these three single technologies.The NaClO/KMnO_(4)/O_(3)+PAC+coagulation-sedimentation combined process demonstrated good removal effect for 2‑MIB in water from Luanhe Diversion Project,among which the O_(3)+PAC+coagulation-sedimentation process was the best.Combined with the field situation,the NaClO and PAC combined process was employed in practical application,and the NaClO+PAC+PAC process(PAC was added in two positions)demonstrated a good performance for removal of 2‑MIB in water from Luanhe Diversion Project,which ensured the safe operation of water supply in winter of Tianjin,and provided reference for dealing with 2‑MIB pollution in water from Luanhe Diversion Project.

关 键 词：引滦水 2-甲基异莰醇(2-MIB) 预氧化 粉末活性炭 混凝沉淀 

分 类 号：TU991[建筑科学—市政工程]