Organic Contamination and Biodegradability of Landfill Leachate

Two different leachates of Chang´an landfill in Chendu were collected as the object of study. The components of organic pollutants in leachates were detected by combined GC-MS technique based on the general water quality analysis. Test results of study are as the follows: the type and nature of organic pollutant effect directly on leachate biodegradability. In high biodegradability (BOD₅/COD_Cr = 0.3 ~ 0.4) leachte,the detected organic pollutant are mainly composed of carboxylic acids and their content accounts for about 90%. While in low biodegradability (BOD₅/COD_Cr <; 0.15) leachte, the detected organic pollutant are mainly composed of alkanes and their content accounts for about 50%. The research provides a new idea and pathway for the treatment and pollution control of leachate from municipal solid waste landfills. The article presents a optimizing principle of integrated physic-chemical and biological treatment technologies in treating mixed leachate.