稀土废水中氯化铵浓缩的预处理工艺  

CONCENTRATION OF AMMONIA CHLORIDE IN RARE EARTH WASTEWATER BY INTEGRATED MEMBRANE TECHNOLOGY

作　　者：胡亚芹[1] 吴礼光[1] 叶向群[2] 吴春金[1] 薛德明[1] 

机构地区：[1]国家海洋局杭州水处理技术研究开发中心,浙江杭州310012 [2]浙江大学材料与化工学院,浙江杭州310027

出　　处：《水处理技术》2005年第7期61-62,共2页Technology of Water Treatment

基　　金：国家"十五"科技攻关计划项目(2002BA313B09)

摘　　要：稀土废水成分复杂,进膜之前必须进行预处理。废水中所含的油(7.08mg/L)通过除油纤维、活性炭吸附可降低到0.01mg/L以下。经氨水沉淀、离子交换树脂软化后,废水中检测不出钙镁离子。软化废水经3～4‰的聚丙烯酰胺(PAM)絮凝并通过机械滤器,SDI值降至5以下。经以上工序处理,稀土氯化铵废水可达到膜分离装置进水水质要求。The oil in wastewater (7.08mg/L) could lower to below 0.01mg/L by oil-absorbing-fiber and activated carbon. Through softening by ammonia water precipitation and ion exchange resin, calcium and magnesium ions failed to be detected out ; passing 3～4‰ PAM for flocculation and the mechanical filter, SDI of the softened wastewater lowered to below 5. Through the above technological process, the wastewater with rare earth ammonia chloride can meet the requirements of the influent water for membrane process.

关 键 词：稀土废水 预处理工艺 聚丙烯酰胺(PAM) 浓缩 离子交换树脂 活性炭吸附 膜分离装置 氯化铵废水 钙镁离子 水质要求 SDI 软化 除油 沉淀 

分 类 号：X756[环境科学与工程—环境工程] TQ028.8[化学工程]