大型秸秆沼气集中供气工程温室气体减排估算

发布时间：2019-06-20 22:55

【摘要】：发展秸秆沼气工程可有效地减少农业温室气体排放,科学核算温室气体减排量为管理和监督温室气体排放状况提供数据支撑。该文以河北省沧州市耿官屯大型秸秆沼气集中供气工程为研究对象,参考和借鉴了自愿减排项目方法学、CDM方法学,构建了大型秸秆沼气集中供气工程温室气体减排计量方法,包括项目边界、基准线排放量、项目排放量、泄漏量、减排量5个方面,计算了2014年耿官屯大型秸秆沼气集中供气工程温室气体减排量。研究结果表明:项目基准排放量包括秸秆处理产生的温室气体排放、未建秸秆沼气工程情况下农村居民生活用能及农田施用化肥生产耗能产生的温室气体排放。项目排放量包括秸秆与沼肥运输过程耗能排放、工程运行过程耗能排放及沼气处理温室气体排放,项目泄漏量即沼气生产、储存、管网供气和利用过程中产生的因物理泄漏所造成的排放。2014年耿官屯大型秸秆沼气集中供气工程基准线CO2排放量为5 776.15 t,项目排放量为57.53 t,泄漏量为136.59 t,减排量为5 582.03 t,约相当于2 100 t标准煤CO2排放量,每消耗1 t(干质量)秸秆可净减排3.56 t,每利用1 m3沼气可净减排11.50 kg。同时,在工程设计、管道设计、工程管理、工艺技术改良升级等方面提出了提升大型秸秆沼气工程温室气体减排能力的策略。
[Abstract]:The development of straw biogas project can effectively reduce agricultural greenhouse gas emissions, and scientific accounting of greenhouse gas emission reduction provides data support for the management and supervision of greenhouse gas emissions. This paper takes Gengguantun large straw biogas centralized gas supply project in Cangzhou City, Hebei Province as the research object, refers to and draws lessons from the methodology of voluntary emission reduction project and CDM methodology, and constructs the greenhouse gas emission reduction measurement method of large straw biogas centralized gas supply project, including project boundary, datum emission, project emission, leakage and emission reduction. The greenhouse gas emission reduction of Gengguantun large straw biogas centralized gas supply project in 2014 was calculated. The results show that the benchmark emissions include greenhouse gas emissions from straw treatment, domestic energy consumption from rural residents without straw biogas project and greenhouse gas emissions from fertilizer production without straw biogas project. The project emissions include energy consumption emissions from straw and biogas fertilizer transportation, energy consumption emissions from project operation and greenhouse gas emissions from biogas treatment, and emissions from physical leakage caused by physical leakage during biogas production, storage, pipe network gas supply and utilization. In 2014, the CO2 emissions from the Gengguantun large straw biogas centralized gas supply project were 5 776.15 tons, and the project emissions were 57.53 tons. The leakage is 136.59 t, the emission reduction is 5 582.03 t, which is equivalent to the CO2 emission of 2 100 t standard coal. The net emission reduction of 1 t (dry mass) straw is 3.56 t, and the net emission reduction is 11.50 kg. per 1 m3 biogas utilization. At the same time, the strategies to improve the greenhouse gas emission reduction ability of large straw biogas project are put forward in the aspects of engineering design, pipeline design, engineering management, process technology improvement and upgrading.
【作者单位】：中国农业科学院农业资源与农业区划研究所;
【基金】：国家自然科学基金(31200337,41301626) 河北省社会科学基金项目(HB14YJ031)
【分类号】：S216.4;X701

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