净水沉淀污泥中铝盐混凝剂的回收研究  

Research about recovery of aluminum in sludge from water supply plant

作　　者：庄海涛[1] 尹启超[1] 丁仕琼[1] 王东田[1] 

机构地区：[1]苏州科技学院江苏省环境科学与工程重点实验室,江苏苏州215011

出　　处：《渤海大学学报（自然科学版）》2009年第3期202-206,共5页Journal of Bohai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(No:50878136);江苏省"六大人才高峰"行动计划资助项目(No:07-A-021)

摘　　要：净水厂混凝沉淀过程中常用的混凝剂为铝盐,产生的污泥中往往含有大量铝盐,因此,对其回收再利用不但可以使资源得到有效的利用,而且可以避免对环境带来的二次污染。在酸性条件下,铝盐能够较快从污泥中溶解出来,超声波功率、搅拌强度、温度、作用时间等都是影响铝盐溶出的重要因素。超声波是一种弹性机械波,在超声波的作用下,净水污泥中的铝盐回收率有较大的提高。The process of coagulating and depositing in water puriticatton plant usually uses aluminum coagulation, so the sludge from water purification plant involves a large mount of Alum. Therefore to all-around use the sludge, not only reuse Aluminum to reduce the sludge treatment cost, but also avoid the secondary pollution. Aluminum can be recovered from the sludge with acid. Whip, pH, temperature and time are factors of Aluminum recovery from sludge. Ultrasound is a stretch mechanical wave. Stripping Aluminum by the Ultrasound and acid from the sludge, not only increase the recovery ratio, but also shorten the time of stripping of Aluminum.

关 键 词：净水污泥 铝盐 酸化 超声波 

分 类 号：X703.1[环境科学与工程—环境工程]