【作者】 牛红志； 孔晓英； 李连华； 孙永明； 袁振宏； 周贤友；

【Author】 Niu Hong-zhi;Kong Xiao-ying;Li Lian-hua;Sun yong-ming;Yuan Zhen-hong;Zhou Xian-you;Guangzhou Institute of Energy Conversion Chinese Academy of Sciences,CAS,Key Laboratory of Renewable Energy;UCAS;

【机构】 中国科学院广州能源研究所,中国科学院可再生能源重点实验室； 中国科学院大学；

【摘要】 本文以玉米秆为例研究农业废弃物通过批式中温（35+1℃）厌氧发酵工艺制备生物燃气的过程,并应用物质流分析方法评价该过程原料中的C、N元素的分布情况和物质与能量的转化效率。结果表明:玉米秆制备生物燃气的产气率和产CH₄率分别为326.09和165.04 ml.（gVS）^-1,CH₄平均含量为50.61%;物质流分析显示,C元素流向分布:33.4%生物燃气,6.9%沼液,61.7%沼渣;N元素在剩余物中的流向分布:49.5%沼液,50.5%沼渣;物质与能量转化效率分别为37.5%和35.7%。玉米秆单一原料制备生物燃气转化效率不高,发酵剩余物中仍含有大量的资源和能源。农业废弃物燃气化利用须与其他生物质资源搭配并合理规划资源和能源的多级利用。该研究为农业废弃物的资源管理和能源化利用提供理论依据。更多还原

【Abstract】 Performance of biogas produced from corn stalks was investigated adopting batch mid-temperature（35±1℃） anaerobic fermentation process,and material and energy flows during fermentation process were also analyzed with material flow analysis（MFA） method in this paper.The results showed that during the fermentation process from corn stalks to biogas,cumulate gas production of biogas and CH4 were 326.09 and 165.04 ml-（gVS）^-1,respectively,and average CH₄ content in biogas was 50.61%.Based on MFA of the fermentation process system,33.4%,6.9%and 61.7%of C element were converted into biogas,biogas slurry and biogas residue,respectively;for element N few converted into biogas,49.5%and 50.5%were converted into biogas slurry and biogas residue separately;the conversion efficiencies of material and energy from raw materials to biogas was 37.5%and 35.7%separately.This study provides basis for resource management and energy utilization of agricultural wastes.更多还原