| Abstrakt: |
In situ aeration is a promising remediation technology for old landfills, as it could accelerate carbon transformation, reduce organic load, decrease landfill post closure period and achieve earlier beneficial reuse of land. In this experiment, three landfill aeration simulators were constructed, utilizing heat belt to achieve incubation temperature at 35° C, 45° C and 55° C respectively. During the past 291 days, leachate COD in the aeration reactors were 1~5 times higher than that in anaerobic reactors. Analysis of the dissolved organic carbon (DOC) showed that aeration increased the concentration of organic acid, especially humic acid. Further structural characterization of the extracted humic matters will be conducted in elemental composition, Fourier transform infrared spectroscopy (FTIR), and Carbon-13 Nuclear Magnetic Resonance 13(C-NMR). The results of characterization work could help to explain the cause of increased organic load by aeration, and better understand the different chemical and biological mechanism involved in different aeration modes. [ABSTRACT FROM AUTHOR] |
