Methane emissions from MSW landfill with sandy soil covers under leachate recirculation and subsurface irrigation

Seasonal Variation of Landfill Methane and Carbon Dioxide Emissions in a Tropical Climate

“…The mean value of CH 4 emissions during the wet season was approximately 1.56 times higher than the mean of emissions during the dry season, while the CO 2 emissions mean during the wet season was approximately 1.5 times higher than that during the dry season. This is consistent with the finding of Wang-Yao et al [7]. Higher emissions during the wet season might be attributed to a higher waste moisture content during the wet season than the dry season, which facilitated nutrient transportation through waste layers and accelerated waste decomposition to produce more LFG.…”

“…This finding is consistent with the results obtained by Abushammala et al [8], in which the geospatial and arithmetic means were almost identical. The arithmetic and geospatial means of CH 4 and CO 2 emissions during the wet season were higher than those in the dry season (Table II and Table III) which were consistent with the results of Wang-Yao et al [7] and Fourie and Morris [5]. The mean value of CH 4 emissions during the wet season was approximately 1.56 times higher than the mean of emissions during the dry season, while the CO 2 emissions mean during the wet season was approximately 1.5 times higher than that during the dry season.…”

“…Maurice and Lagerkvist [5] investigated seasonal variations of CH 4 [10] investigated CH 4 emissions in semi-arid climates using the static flux chamber method and reported higher CH 4 emissions in the winter relative to the summer season. Zhang et al [7] found that CH 4 emissions from a landfill located at eastern China (humid subtropical climate) were higher in the winter than in the summer season. Wang-Yao et al [11] measured CH 4 emissions from seven landfills in Thailand (tropical climate) using the static flux chamber method and found higher CH 4 emissions during the wet season than the dry season.…”

“…Two types of flux chambers have been described in the literature to measure LFG emissions: static and dynamic flux chambers. The static flux chamber method is the most simple and frequently used [3]- [7].…”

The effects of aged refuse and sewage sludge on landfill CH4 oxidation and N2O emissions: Roles of moisture content and temperature

“…Calculations of the CO 2 -equivalents indicated that N 2 O emissions from MSW landfill sites were reported to be two to three orders of magnitude lower than that of the CH 4 fluxes (Rinne et al, 2005;Zhang et al, 2009). The reported CO 2 -equivalent values for CH 4 fluxes indicated that it was responsible for more than 90% of the total greenhouse gas emissions (CH 4 , CO 2 and N 2 O; Zhang et al, 2008;Zhang et al, 2012a,b). In this study, more than 80% CH 4 was consummated within the 120 h incubation when the ratios of the aged refuse:sewage sludge were: 10:0 and 8:2 (on a dry weight basis, Fig 1).…”