当前位置： SCI文献检索 > JOURNAL OF ENVIRONMENTAL MANAGEMENT期刊下所有文献 > Methane hotspot localization and visualization at a large-scale Xi'an landfill in China: Effective tool for landfill gas management.

Methane hotspot localization and visualization at a large-scale Xi'an landfill in China: Effective tool for landfill gas management.

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 33,975 ppm. At least 75% of the methane concentration values of the sampling points are lower than the allowed limit (500 ppm). More than 95% of the high concentration zones (>500 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 -0.743 (p < 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 500 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 (0.5 mm) and can be easily damaged by the operation vehicles. Thicker geomembranes (>1.5 mm) with a good construction quality control are expected to provide better performance at this site.

journal_name

J Environ Manage

journal_title

Journal of environmental management

authors

Shen S,Chen Y,Zhan L,Xie H,Bouazza A,He F,Zuo X

doi

10.1016/j.jenvman.2018.08.012

subject

Has Abstract

pub_date

2018-11-01 00:00:00

pages

232-241

eissn

0301-4797

issn

1095-8630

pii

S0301-4797(18)30883-1

journal_volume

225

pub_type

杂志文章

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