| 碱热水解改善杨树落叶厌氧消化性能的研究 |
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| 引用本文： | 王昊,王洪涛.碱热水解改善杨树落叶厌氧消化性能的研究[J].中国环境科学,2009,29(2):181-185. |
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| 作者姓名： | 王昊 王洪涛 |
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| 作者单位： | 清华大学环境科学与工程系,北京,100084 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 选用杨树落叶进行碱热水解后测定生物化学甲烷势(BMP),研究底物溶解、水解和产物厌氧消化性能的变化.结果表明,碱热处理显著加速杨树落叶溶解和水解,固相中半纤维素和蛋白质含量显著下降.170℃下,碱热水解后溶解性COD (SCOD)浓度为31.7g/L,乙酸浓度为1533mg/L.通过纤维素碱降解机理分析,提出乙酸生成途径.甲烷势试验表明,170℃下比生物气产量增量最大.高固体消化可以有效处理水解产物,运行表现更加稳定,有机负荷2.65g/(L×d)时甲烷转化率为25.3%.
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| 关 键 词： | 绿化废物 碱热水解 乙酸 生化甲烷势 高固体消化 |
| 收稿时间： | 2008-07-21; |
Digestibility improvement of aspen leaf with alkaline hydrothermal pretreatment |
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| WANG Hao,WANG Hong-tao.Digestibility improvement of aspen leaf with alkaline hydrothermal pretreatment[J].China Environmental Science,2009,29(2):181-185. |
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| Authors: | WANG Hao WANG Hong-tao |
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| Abstract: | Effect of alkaline hydrothermal pretreatment on liquefaction, hydrolysis and digestibility of fallen aspen leaves was investigated by biochemical methane potential (BMP) assays. The solubilization and hydrolysis were significantly enhanced, especially for hemi-cellulose and protein. The SCOD and acetic acid concentration were 31.7g/L and 1533mg/L after pretreatment at 170℃, and formation pathways of acetic acid were proposed with mechanism analysis. The specific biogas production increase was highest in BMP assays. The semi-dry digestion system functioned steadily with the feed of hydrolysate, and methane conversion ratio on carbon basis was enhanced to 25.3% at loading rate of 2.65g/(L×d). |
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| Keywords: | green waste alkaline hydrolysis acetic acid biochemical methane potential semi-dry digestion |
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