新型导电疏水膜脱氨集成技术  

Research on the integrated technology of deamination by novel conductive hydrophobic membranes

作　　者：郑泽鹏 徐莉莉 张勇[1] 李魁岭 宋沆 王军[1,2] ZHENG Zepeng;XU Lili;ZHANG Yong;LI Kuiling;SONG Hang;WANG Jun(State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [2]中国科学院大学,北京100049

出　　处：《环境工程学报》2024年第12期3475-3485,共11页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划资助项目(2022YFC3203002);湖北省2022年省科技计划—揭榜挂帅项目(2022BEC007)。

摘　　要：传统膜脱氨工艺具有较高的脱氨效率,在工业废水脱氨处理领域备受关注,但该工艺存在酸碱调节药剂成本高的突出问题,技术创新空间大。通过制备镍/碳毡-聚四氟乙烯(Ni/C-PTFE)导电疏水膜,并以其为阴极构建了导电疏水膜脱氨工艺,利用导电疏水膜阴极电解水原位产生的OH^(−)将NH_(4)^(+)转化为NH_(3(g)),同时将阳极产生的酸作为NH_(3(g))的吸收液。该工艺不需要投加任何酸碱药剂,降低了药剂成本,与此同时可收集阴极产生的氢气实现氨资源化过程同步氢回收。相比传统膜脱氨工艺,在相同运行条件下,导电疏水膜脱氨工艺氨回收效果提高到2.3倍,运行成本节省了约62.1%,处理每吨水可额外带来0.5元产氢利润。相比其他电化学回收氨系统,导电疏水膜脱氨集成创新技术可在不投加任何酸碱药剂的情况下实现高效的氨资源化回收。The traditional membrane deamination process has received wide attention in the field of industrial wastewater deamination treatment due to its high ammonia recovery efficiency and device integration capability.However,this process faces serious challenges due to high consumption of acid and alkali chemicals.This study reported a novel membrane deamination integrated system,which utilized nickel/carbon feltpolytetrafluoroethylene(Ni/C-PTFE)conductive hydrophobic membranes as cathode for ammonia recovery.The conductive hydrophobic membranes generated OH^(−)ions in-situ,which converted NH_(4)^(+)ions to volatile NH_(3(g)).The acid generated by the anode was used as the absorption liquid of NH_(3(g)).The novel system avoided the consumption of acid and alkali,which reduced the expenditure of chemicals.In addition,the hydrogen generated from the cathode can be collected to achieve the simultaneous hydrogen recovery during the ammonia recovery process.Compared with the traditional membrane deamination process,the ammonia recovery efficiency of the novel membrane deamination integrated system can be increased to 2.3 times,and the operating cost was decreased by approximately 62.1%.Besides,this technique could yield additional benefits of 0.5 RMB through hydrogen production for treating each ton of wastewater.Compared to other electrochemical ammonia recovery systems,this promising membrane deamination integrated technology had the potential to achieve efficient ammonia resource recovery without the addition of any acidic or alkaline chemicals.

关 键 词：导电疏水膜 膜脱氨 氨回收 氨资源化 氢回收 

分 类 号：X703[环境科学与工程—环境工程]