能源草厌氧发酵产气性能与动力学分析
Biogas Production Performance and Dynamics of Anaerobic Digestion of Different Energy Grasses
查看参考文献19篇
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文摘
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选取象草和杂交狼尾草等5种能源草为发酵原料,采用中温批式厌氧消化工艺,研究能源草发酵前后理化特性变化和发酵产气性能,并对累积产气动力学分析。研究结果表明:不同能源草的发酵产气性能与原料特性之间有较大的关系,其产气率与木质素成负线性相关。杂交狼尾草由于刈割时生长时间较长,使得木质素质量分数(24.88%)较高,其产气性能较差,实际产甲烷率仅为理论产甲烷率的26.95%,而华南象草刈割时木质素质量分数(15.82%)较低,其产气性能较好,VS累积产气率为379.58 mL/g,VS产甲烷率为228.55 mL/g,生物燃气中甲烷体积分数为60.21%。对累积产气曲线拟合,发现采用修正Gompertz方程能较好模拟能源草发酵累积产气率的变化过程。该研究可对能源草的能源化开发利用提供参考。 |
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其他语种文摘
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Energy grass, as the second generation of new energy crops, has a brightly development prospect. Five kinds of energy grasses were selected as the raw materials. Their physico-chemical characteristics were investigated together with the biogas production performances of anaerobic digestion in the process of laboratory scaled batch anaerobic fermentation at mesophilic temperature(35℃). And the dynamics of cumulative biogas production was analyzed. The results indicate that these energy grasses have good performances for the biogas production. But there are great differences in the relationship between the biogas production performances and the energy grass properties. The biogas yield and the lignin content are in a negative linear correlation, it means the lower is the lignin content of raw materials, the better is biogas production performance. The lignin content of Hybrid Pennisetum(24.88%) is higher for its long time growth, so it has a worse biogas production performance and the specific methane yield is only about 26.95% of the theoretical methane production. While the lignin content of Pennisetum purpureum cv.Huanan is lower, it has a better anaerobic digestion performance: the cumulative biogas yield, methane yield and methane content are 379.58 mL/g, 228.55 CH_4mL/g and 60.21%, respectively. By fitting the cumulative gas production curve, it was concluded that the energy grass digestion process of cumulative biogas production could be appropriately described by the modified Gompertz equation. This study provides a reference for the development and utilization of different energy grasses. |
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来源
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农业机械学报
,2016,47(5):191-196 【核心库】
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DOI
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10.6041/j.issn.1000-1298.2016.05.026
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关键词
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能源草
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厌氧发酵
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生物燃气
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产气性能
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动力学
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地址
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中国科学院广州能源研究所, 广州, 510640
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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, 广州, 510640
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中国科学院广州能源研究所, 广东省新能源和可再生能源研究开发与应用重点实验室, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1298 |
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学科
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农业工程 |
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基金
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国家863计划
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中国科学院重点部署项目
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广东省科技计划项目
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广东省广州市科技计划项目
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文献收藏号
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CSCD:5701915
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