HR: 1340h
 AN: B53A-0934    [Abstracts]
 TI: The Application Of Biofilter System For Reduction Of Methane Emissions From Modern Sanitary Landfills
 AU: Sung, K
 EM: ksung@pknu.ac.kr
 AF: Ecological Engineering Major, Pukyong National University, 599-1 Daeyeon 3-dong, Nam- gu, Busan, 608-737, Korea, Republic of
AU: * Park, S
 EM: soyoung@pknu.ac.kr
 AF: Department of Ocean Engineering, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan, 608-737, Korea, Republic of
AB: Increased atmospheric concentrations of greenhouse gases (GHG) caused by anthropogenic activities has been related to global climate change. Methane, the second most important GHG after CO2, is 21 times more effective at trapping heat than CO2. Therefore, methane emission control is of utmost importance for global warming reduction. To minimize leachate production and protect groundwater resources, modern sanitary landfills are equipped with composite covers and gas collection systems. Methane from modern sanitary landfills is vented directly to the atmosphere, except for some of the largest landfills where it is recovered as energy and burned at the site. However, the efficiency of energy recovery systems in larger landfills is reduced as the amount of CH4 generated from landfill begins to decrease. In this study, the performance of a lab-scale model biofilter system was investigated to treat CH4 gas emitted from modern sanitary landfills by conducting batch and column experiments using landfill cover soil amended with earthworm cast as the filter bed medium. From the batch experiments to measure the influence of moisture content and temperature of the filter medium on CH4 removal capacity of a biofilter system, the optimum moisture content and temperature were found to be 10-15% by weight and 25-35°C, respectively. The column experiment was conducted to measure the influence of inlet CH4 concentration and CH4 loading rate on CH4 removal capacity of a biofilter system. As the inlet CH4 concentration decreased, the percentage of CH4 oxidized increased. Up to a CH4 loading rate of 2785 g CH4 m3 h- 1 (EBRT = 7.7 min), the CH4 removal efficiency of the biofilter was able to reach 100%. Based on the results of the study, the installation of a properly managed biofilter system should be capable of achieving a reduction in atmospheric CH4 emissions from modern sanitary landfills at low CH4 generation stage.
DE: 0419 Biomineralization
 DE: 0448 Geomicrobiology
 DE: 0471 Oxidation/reduction reactions (4851)
 DE: 0478 Pollution: urban, regional and global (0345, 4251)
 SC: Biogeosciences [B]
 MN: 2007 Fall Meeting