以河南豫光金铅有限公司污水处理厂的二沉池脱水污泥为试验对象,采用电动力学法强化处理污泥中Pb、Cu、Zn这3种重金属.研究了污泥酸化预处理、电解时间、阴极pH控制等对去除率的影响,并且采用离子交换膜代替传统渗透膜,探讨其对3种重金属去除率的影响.研究结果表明:随着电解时间的延长,重金属去除率有所增加,并逐渐趋于稳定；污泥的酸化和循环阴极液控制阴极pH值,可以提高去除率；综合使用循环阴极液和离子交换膜对Pb、Cu、Zn这3种重金属的总去除率分别达75.68％、85.32％和94.28％.%By using the electrokinetics three kinds of heavy metal in dewatered sludge from secondaryrnsedimentation tank of sewage treatment plant of Henan Yuguang Gold & Lead Co. were processed. The effectsrnof the sludge acidizing pretreatment, electrolytic time, cathode pH on the removal rate were investigated. Ionrnselective membrane was used for removing Pb, Cu and Zn ions from the actual municipal sludge. The resultsrnshow that the heavy metal removal rate is increased and gradually become stable with the extension of time. Thernsludge acidification and controlling cathode pH by cycling cathode fluid can improve the removal rate. Thernremoval rate can be increased greatly when ion selective membrane is used. By comprehensive use of therncirculating cathode fluid and ion selective membrane, the total removal rate of Pb, Cu and Zn can reach torn75. 68% ,85. 32% ,94. 28% respectively.
展开▼
