title: Greenhouse gas emissions from landfill leachate treatment plants: a comparison of young and aged landfill.
abstract: With limited assessment, leachate treatment of a specified landfill is considered to be a significant source of greenhouse gas (GHG) emissions. In our study, the cumulative GHG emitted from the storage ponds and process configurations that manage fresh or aged landfill leachate were investigated. Our results showed that strong CH4 emissions were observed from the fresh leachate storage pond, with the fluxes values (2219-26,489 mg Cm(-2)h(-1)) extremely higher than those of N2O (0.028-0.41 mg Nm(-2)h(-1)). In contrast, the emission values for both CH4 and N2O were low for the aged leachate tank. N2O emissions became dominant once the leachate entered the treatment plants of both systems, accounting for 8-12% of the removal of N-species gases. Per capita, the N2O emission based on both leachate treatment systems was estimated to be 7.99 g N2O-N capita(-1)yr(-1). An increase of 80% in N2O emissions was observed when the bioreactor pH decreased by approximately 1 pH unit. The vast majority of carbon was removed in the form of CO2, with a small portion as CH4 (<0.3%) during both treatment processes. The cumulative GHG emissions for fresh leachate storage ponds, fresh leachate treatment system and aged leachate treatment system were 19.10, 10.62 and 3.63 Gg CO(2) eq yr(-1), respectively, for a total that could be transformed to 9.09 kg CO(2) eq capita(-1)yr(-1).
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address: xjwang@iue.ac.cn.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address: msjia@iue.ac.cn.
authors.forename: Mingsheng
authors.initials: M
authors.lastname: Jia
authors.affiliation: Xiamen City Environmental Sanitation Management Department, Xiamen 361000, China. Electronic address: cxiaoh_xm@126.com.
authors.forename: Xiaohai
authors.initials: X
authors.lastname: Chen
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address: yxu@iue.ac.cn.
authors.forename: Ying
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address: xylin@iue.ac.cn.
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Lin
authors.affiliation: Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan. Electronic address: jkao@mail.nsysu.edu.tw.
authors.forename: Chih Ming
authors.initials: CM
authors.lastname: Kao
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address: shchen@iue.ac.cn.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Chen
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D019149:Bioreactors; D004784:Environmental Monitoring; D005740:Gases / Q000032:analysis*; D017752:Greenhouse Effect; D061005:Ponds / Q000737:chemistry; D013997:Time Factors; D064091:Waste Disposal Facilities; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D000393:Air Pollutants; D005740:Gases; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Aged leachate; Annual GHG emissions; Fresh leachate; Greenhouse gas fluxes; Leachate treatment; Storage pond