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GHGs emissions from waste disposal in Lombardia (Italy): inventory 1975-2008 and projections 2009-2020

机译:伦巴第(意大利)废物处置产生的温室气体排放量:1975-2008年清单和2009-2020年预测

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摘要

A survey has been conducted across all MSW landfills with gas extraction system in the Lombardia Region (Italy) in order to collect data for an emission inventory assessment of greenhouse gas (GHG) emissions in the timeframe 1975-2008. The survey results identified a large number of landfills opened over the last 35 years and characterized by different kinds and amounts of waste disposed. Using the IPCC methodology, GHG emissions in the year 2008 were quantified to be 1.81 Mt CO_2-eq, which corresponds to 1.9% of overall GHG emissions in Lombardia. A dependency between collection efficiency and age of the collecting network has been established and used for the projection of GHG emission in the period 2009-2020, and for two scenarios: a business as usual (BAU) and an alternative one that implies policies to reduce biodegradable carbon content in the residual waste. The latter allows for a 45% reduction of the GHG emissions in 2020 compared to the year 2008, whereas in the BAU scenario the expected reduction is 32%. The sensitivity analysis shows that a variation of parameters that represent the carbon content of the waste category and degradation rate constant, within the range reported in the literature, could affect GHG emission level by about ±18%, whereas the uncertainty due to landfill gas (LFG) composition is less relevant.
机译:在伦巴第大区(意大利),对所有带有抽气系统的城市固体垃圾填埋场进行了调查,以便收集数据,以评估1975-2008年期间的温室气体排放量。调查结果确定了过去35年中开放的大量垃圾填埋场,其特点是处理的垃圾种类和数量不同。使用IPCC方法,2008年的温室气体排放量被量化为1.81 Mt CO_2-eq,相当于伦巴第大区温室气体排放总量的1.9%。建立了收集效率与收集网络的年龄之间的依存关系,并将其用于预测2009-2020年期间的GHG排放,并用于两种情况:“一切照旧”(BAU)和另一种暗示降低排放量的政策残留废物中可生物降解的碳含量。后者使2020年的温室气体排放量与2008年相比减少了45%,而在BAU方案中,预期的减少量为32%。敏感性分析表明,在文献报道的范围内,代表废物类别的碳含量和降解速率常数的参数变化可能会影响温室气体排放水平约±18%,而由于垃圾填埋气( LFG)组成不那么相关。

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