有机污染物对垃圾渗滤液可生化性的影响

Effect of organic pollutants on biodegradability of landfill leachate

以成都市长安垃圾填埋场渗滤液为研究对象,在常规水质分析的基础上,利用GC-MS联用技术对其中的有机污染物进行检测,考察了有机污染物的种类和性质对垃圾渗滤液可生化性的影响。研究结果表明:垃圾渗滤液的可生化性受有机污染物种类和性质的直接影响。在可生化处理的垃圾渗滤液A中(BOD5/CODCr为0.3～0.4),检出的有机污染物主要是有机酸类物质,约占90%;在不易生化处理的垃圾渗滤液B中(BOD5/CODCr<0.15),检出的有机污染物主要是烷烃类物质,约占50%。研究为垃圾渗滤液的处理提供了新思路。

The leachate of Chang＇an Landfill in Chendu has been collected as a subject of case study. Based on routine analysis of water quality, the components of organic pollutants in the leachate have been detected by combined GC-MS technique. The effect of the type and property of organic pollutants on biodegradability of landfill leachate has been investigated. The results of study show that the type and property of organic pollutants has direct effect on leachate biodegradability. In highly biodegradable landfill leachte （BOD5/CODcr 0.3-0.4）, the detected or- ganic pollutants in leachate are mainly earboxylie acids and their content is about 90%, while in low biodegradable landfill leaehe （BOD5/CODcr〈0. 15）, the detected organic pollutants in leachate are mainly alkanes and their content is about 50%. The research provides a new idea and approach for the treatment and pollution control of leachate at municipal solid waste landfills. The article presents the optimizing principle of integrated physicochemical and biological treatment technologies to the treatment of mixed leachate.