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Quantification of Greenhouse Gas Emissions from the Predisposal Stage of Municipal Solid Waste Management

机译：从城市固体废物管理的处置阶段开始量化温室气体排放

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摘要

Municipal solid waste (MSW) disposal represents one of the largest sources of anthropogenic greenhouse gas (GHG) emissions. However, the biogenic GHG emissions in the predisposal stage of MSW management (i.e., the time from wast being dropped off in community or household garbage bins to being transported to disposal sites) are excluded from the IPCC inventory methodology and rarely discussed in academic literature. Herein, we quantify the effluxes of carbon dioxide (CO_2), methane (CH_4), and nitrous oxide (N_2O) from garbage bins in five communities along the urban-rural gradient in Beijing in four seasons. We find that the annual average CO_2 CH_4, and N_2O effluxes in the predisposal stage were (1.6 ± 0.9)10~3,0.049 ± 0.016, and 0.94 ± 0.54 mg kg~(-1))h~(-1) (dry matter basis) and had significant seasonal differences (24- to lS9-fold) that were strongly correlated with temperature. According to our estimate, the N_2O emission in the MSW predisposal stage amounts to 20% of that in the disposal stage in Beijing, making the predisposal stage a nontrivial source of waste-induced N_2O emissions. Furthermore, the CO_2 and CH_4, emissions in the MSW predisposal account for 5% (maximum 10% in summer) of the total carbon contents in a Beijing's household food waste stream, which has significance in the assessment of MSW-related renewable energy potential and urban carbon cycles.
机译：城市固体废物（MSW）的处置是人为温室气体（GHG）排放的最大来源之一。但是，IPCC清单方法不包括城市固体废弃物管理的处置前阶段（即从被丢弃在社区或家庭垃圾箱中直到被运送到处置场所的时间）中的生物温室气体排放，并且在学术文献中很少讨论。在此，我们量化了四个季节中北京沿城乡梯度的五个社区的垃圾箱中的二氧化碳（CO_2），甲烷（CH_4）和一氧化二氮（N_2O）的排放量。我们发现在处置前的年平均CO_2 CH_4和N_2O流出量为（1.6±0.9）10〜3,0.049±0.016和0.94±0.54 mg kg〜（-1））h〜（-1）（干物质基础），并具有明显的季节性差异（24至lS9倍），与温度高度相关。根据我们的估算，城市固体废弃物预处置阶段的N_2O排放量相当于北京市处置阶段的N_2O排放量的20％，这使得处置前阶段成为废物诱发的N_2O排放的重要来源。此外，城市固体废弃物处置过程中的CO_2和CH_4排放量占北京家庭食物垃圾流中总碳含量的5％（夏季最高10％），这对于评估城市固体废弃物相关的可再生能源潜力和城市碳循环。

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  • 来源
    《Environmental Science & Technology》 |2017年第1期|320-327|共8页
  • 作者

    Chuanbin Zhou; Daqian img; Zhilan Zhao;

  • 作者单位

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco- Environmental Science, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing100085, China,Center for Industrial Ecology, School of Forestry and Environmental Studies, Yale University, 195 Prospect Street, New Haven, Connecticut 06511, United States;

    Center for Industrial Ecology, School of Forestry and Environmental Studies, Yale University, 195 Prospect Street, New Haven, Connecticut 06511, United States;

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco- Environmental Science, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing100085, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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