Reduction in leachate organic strength

The results of laboratory and field studies show that the aeration of waste deposited in landfills causes an accelerated reduction of the organic matter contained in the leachate compared to the anaerobic reactor. Chemical oxygen demand (COD), total organic carbon 

Giannis et al. (2008) showed that the simulated aerobic landfill bioreactor could remove above 90%) of chemical oxygen demand (COD) and almost to 100%o of biochemical oxygen demand (BOD ) from leachate. The conversion of anaerobic to aerobic landfill (with leachate recirculation) performed in field scale reduced biological oxygen demand (BOD) of leachate up to 70%) within 3 months of aeration (Read et al. 2001b). 

The BOD /COD ratio—the measure of biodegrability of organic matter—reached the value 0.03 after one-year of experiment in the simulated aerobic landfill reactor, and ca. 0.8 in anaerobic one. The BOD /COD ratio determined in the anaerobic reactor at the end of the experiment (after 630 days) was ca. 0.15 (Erses et al. 2008). Borglin et al. (2004) claimed that BOD /COD ratio in leachate from aerobic and anaerobic reactors that had worked 365 days were 0.03 and 0.45, respectively. 

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