磷酸铁系电池正极材料生产废水处理工程实例  

Organic Wastewater Treatment Project Case of Iron Phosphate Cathode Material Production for Battery

作　　者：陈侃 张志浩 叶超 房睿 王琦 张琨 马楫 郑彤 CHEN Kan;ZHANG Zhi-hao;YE Chao;FANG Rui;WANG Qi;ZHANG Kun;MA Ji;ZHENG Tong(School of Environment,Harbin Institute of Technology,Harbin 150001,China;Suzhou Sujing Environmental Engineering Co.Ltd.,Suzhou 215000,China;Urban Water Resources Development and UtilizationNational Engineering Research Center,Harbin 150001,China;Guangdong Yuehai Water Investment Co.Ltd.,Shenzhen 518000,China)

机构地区：[1]哈尔滨工业大学环境学院,黑龙江哈尔滨150001 [2]苏州苏净环保工程有限公司,江苏苏州215000 [3]哈尔滨工业大学水资源国家工程研究中心有限公司,黑龙江哈尔滨150001 [4]广东粤海水务投资有限公司,广东深圳518000

出　　处：《中国给水排水》2024年第8期130-136,共7页China Water & Wastewater

基　　金：国家重点研发计划项目(2018YFC0408001)。

摘　　要：某动力电池用磷酸铁系正极材料生产企业排放的炉窑废水与尾气喷淋废水水量为15 m^(3)/d,该废水含有大量呋喃、有机胺、噻唑等高浓度含硫含氮有机污染物及悬浮物,可生化性差,处理成本高。采用混凝沉淀+单效蒸发+刮板滚筒干燥将有机废水中大部分悬浮物、COD、氨氮、总氮固定进入固废中去除,随后与150 m^(3)/d经混凝沉淀的厂区生产循环冷却水排水混合稀释,再通过AO+MBR生化处理进一步脱氮并去除有机物。该项目投资1200万元,建成后有机废水处理费较原委外处理方式降低77.2%。运行结果显示,该组合工艺对COD、氨氮、总氮的平均去除率分别达到99.79%、99.87%、99.90%,最终出水指标稳定在COD≤200 mg/L、氨氮≤40 mg/L、总氮≤60 mg/L,满足《无机化学工业污染物排放标准》(GB/T 31573—2015)的间接排放标准。The furnace wastewater and exhaust gas scrubber wastewater generated by an enterprise producing iron phosphate cathode materials for automotive batteries has the volume of 15 m^(3)/d,and contains high concentrations of sulfur and nitrogen organic pollutants such as furans,organic amines,and thiazoles,as well as suspended solids,which have poor biodegradability and high treatment costs.Most of suspended solids,COD,NH_(3)-N,and TN in the organic wastewater are fixed into the solid waste for removal by coagulation sedimentation,single-effect evaporation,and scraper drum drying.The treated wastewater is mixed and diluted with 150 m^(3)/d of circulating cooling water from the plant area after coagulation sedimentation,and is further treated using an AO and MBR technology to achieve denitrification and removal of organic substances.The total investment in this project amounted to 12 million yuan,resulting in a 77.2%reduction in treatment cost compared to previous commissioned treatment.Operational results demonstrate that the average removal efficiency of COD,NH_(3)-N,and TN of the combined treatment process achieve 99.79%,99.87%and 99.90%,respectively.The final effluent quality meets the indirect discharge standards specified in the Emission Standards of Pollutants for Inorganic Chemical Industry(GB/T 31573-2015),with COD≤200 mg/L,ammonia nitrogen less than 40 mg/L,and total nitrogen less than 60 mg/L.

关 键 词：动力电池 炉窑废水 尾气喷淋废水 磷酸铁系正极材料 蒸发干燥 生化处理 

分 类 号：X76[环境科学与工程—环境工程]