磷石膏渗滤液资源化处理技术工业应用实践与研究  

Industrial application and research of phosphogypsum leachate recycling treatment technology

作　　者：周正 唐杰林 胡冬璞 史伊蒙 梁莎[1] 段华波 袁书珊 ZHOU Zheng;TANG Jielin;HU Dongpu;SHI Yimeng;LIANG Sha;DUAN Huabo;YUAN Shushan(Hubei Key Laboratory of Multi-Media Pollution Collaborative Control in the Yangtze River Basin,College of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Yunnan Tian'an Chemial Co.,Ltd.,Kunming 650300,China;Hubei Three Gorges Laboratory,Yichang 443007,China)

机构地区：[1]华中科技大学环境科学与工程学院,长江流域多介质污染协同控制湖北省重点实验室,湖北武汉430074 [2]云南天安化工有限公司,云南昆明650300 [3]湖北三峡实验室,湖北宜昌443007

出　　处：《生态产业科学与磷氟工程》2025年第3期78-84,共7页Eco-industry Science & Phosphorus Fluorine Engineering

基　　金：长江生态环境保护修复联合研究(第二期)“磷石膏综合利用技术实证”(2022-LHYJ-02-0301);湖北三峡实验室开放/创新基金(SC232007)。

摘　　要：磷石膏渗滤液具有高磷、高氟、高氨氮、高盐及强酸性等特征,在对土壤和水体造成污染的同时也具有极大的资源化利用价值。本研究利用三碱法分步反应定向辅助膜分离技术资源化磷石膏渗滤液中的N、P、F元素,同时推广该技术在工业上的应用。结果表明:利用CaO、NaOH和Na_(2)CO_(3)(三碱)分步调节pH,能够资源化渗滤液中的氨氮(NH_(3)-N)、磷酸盐(PO_(4)^(3-))、氟化物(F^(-)),同时降低膜进水端结垢离子对膜的影响;渗滤液经过三碱法预处理后,再通过膜法(超滤+纳滤+反渗透)进行深度处理,实现产水电导率<300μS/cm,溶解性固体质量浓度<250 mg/L,达到回用水标准;通过中试装置探究该系统的各单元水质、污泥组分、药剂费用、经济价值,为工业化应用提供基础数据。Phosphogypsum leachate has the characteristics of high phosphorus,high fluorine,high ammonia nitrogen,high salt and strong acid,which not only causes pollution to soil and water,but also has great resource utilization value.The N,P and F elements from phosphogypsum leachate are recycled through three-alkali step reaction coupled with membrane separation technology,and the industrial application of this innovative technology is promoted.The results show that using CaO,NaOH and Na_(2)CO_(3)(three alkali)to adjust the pH step by step can recycle ammonia nitrogen(NH_(3)-N),phosphate(PO_(4)^(3-))and fluoride(F^(-))in the leachate,and reduce the influence of scale ions on the influent end of the membrane.After pretreatment by three-alkali method,the leachate is further treated by membrane method(ultrafiltration-nanofiltration-reverse osmosis)to achieve the conductivity of the produced water<300μS/cm,p(TDS)<250 mg/L,the produced water meets the standard of reuse water.The water quality of each unit,sludge composition,pharmaceutical cost and economic value of the system are explored through the pilot plant to provide basic data for industrial application.

关 键 词：磷石膏渗滤液 资源化 应用实践 

分 类 号：X703[环境科学与工程—环境工程]