吹脱-蒸发处理危废渗滤液的研究.docx

吹脱-蒸发处理危废渗滤液的研究
仲鹏鹏1刘维桥*1周书利1尚通明1岳喜龙2
(1江苏理工学院化学与环境工程学院 江苏常州213000
2扬州杰嘉工业固废处置有限公司 江苏扬州225000 )
摘要：本文分析了危险废物渗滤液中的相关组分，结果表明危废渗滤液组分复杂，含有大量重金属离子、 氨氮、盐分和各类高毒有机物等污染物质，难以通过其他方法处理。研究了危废渗滤液的吹脱 -蒸发规律，
并与生活垃圾渗滤液的吹脱、蒸发规律进行对比。研究表明，通过吹脱 -蒸发技术工艺可对危废渗滤液进行
减量化、资源化和无害化处理，是危废填埋场处理渗滤液的理想方法。本研究找出了工艺运行的的最佳条 件:将渗滤液在常温状态下进行吹脱， pH值控制在10-11之间，吹脱时间为25 min左右，气液比约3400 ,
氨氮脱除率达95%以上；蒸发浓缩pH值控制在10左右，蒸储浓缩液回流再蒸发，其中有机物的挥发与 浓缩时间无关，储出液 COD约200 mg/L 左右，可供填埋场回用，蒸储残渣固化达标后继续填埋。
关键词：吹脱-蒸发 危废 渗滤液 脱除率 中图分类号：X789 文献标志码：A
Study on treatment of leachate derived from hazardous wastes
landfill by stripping-evaporation
ZHONG Peng-peng1 LIU Wei-qiao* 1 ZHOU Shu-li 1
SHANG Tong-ming 1 YUE Xi-long 2
(Jiangsu University of Technology, Changzhou 213000, Jiangsu Province;
2Yangzhou Jie-jia industrial solid-waste disposal Co., Ltd, Yangzhou 225000, Jiangsu Province )
Abstract The related components in the leachate derived from hazardous wastes landfill were analyzed. It resulted that the related components wre complex. There were heavy metal ions, ammonia nitrogen, salinity and various types of high toxicorganic pollutants in the leachate. The leachate amost could not be disposed by other methods. This paper introduced the regulation of the technology of stripping-evaporation disposing leachate of hazardous waste. The comparison was made between disposing leachate of hazardous waste and domestic garbage. Reduction, re