Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7475605 | Journal of Environmental Management | 2018 | 10 Pages |
Abstract
The variation characteristics and influence factors of methane emission at Jiangchungou landfill, one of the largest landfill in China, has been investigated by a one-year field monitoring campaign during 2015-2016. The methane concentration above the landfill surface varied widely from negligible to 33,975â¯ppm. At least 75% of the methane concentration values of the sampling points are lower than the allowed limit (500â¯ppm). More than 95% of the high concentration zones (>500â¯ppm) were located in the temporary cover area (TA). Several environmental factors were found to be related to the variation of the concentration values. A clear correlation was observed between barometric pressure and exceeding-standard areas with a correlation coefficient of â0.743 (pâ¯<â¯0.1). The concentration values in the final cover area (FA) were about one order of magnitude lower than those observed in the TA due to the fact that rapid methane production rate happened in the first 180 days after the high kitchen content wastes were landfilled. The percentages of the measured concentration values exceeding 500â¯ppm near the gas collection wells in TA zone were 71.5% in November, 2015 and 55.7% in January, 2016 due to the leakage from the sides of gas collection wells. The average methane concentration values on the HDPE geomembrane was higher than those observed on the loess cover due to the fact that the geomembrane was relatively thin (0.5â¯mm) and can be easily damaged by the operation vehicles. Thicker geomembranes (>1.5â¯mm) with a good construction quality control are expected to provide better performance at this site.
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Authors
Siliang Shen, Yunmin Chen, Liangtong Zhan, Haijian Xie, Abdelmalek Bouazza, Feiyu He, Xinru Zuo,