| 鸡粪与互花米草沼渣混合发酵产甲烷的研究 |
| 摘要点击 1875 全文点击 1205 修订日期：2011-05-26 |
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| 中文关键词 互花米草沼渣 鸡粪 混合发酵 沼气 甲烷 |
| 英文关键词 Spartina alterniflora residue after producing methane chicken manure anaerobic co-digestion biogas methane |
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| 中文摘要 |
| 在中温(35℃±1℃)条件下,采用批式发酵方式,进行了鸡粪与互花米草沼渣不同混合比例的厌氧发酵实验.实验设置鸡粪∶互花米草沼渣干物质(TS)比分别为5∶0(T1)、4∶1(T2)、3∶2(T3)、2∶3(T4)、1∶4(T5)和0∶5(T6)共6个处理.结果表明,经中温干发酵后的互花米草沼渣仍具有一定的厌氧产沼气能力,TS产气量为107.25 mL·g-1,甲烷含量为76.92%,厌氧微生物对互花米草沼渣纤维素的结晶区有一定的破坏作用,厌氧发酵后纤维素的相对结晶度指数CrI下降了5.55%; 将鸡粪与互花米草沼渣混合发酵,明显提高了原料的厌氧产气性能,T2的产气效果最好,T1、T3~T6的累积产气量分别为T2的61.31%、62.09%、52.15%、39.74%和31.67%; 鸡粪与互花米草沼渣混合发酵的产酸类型为混合型发酵,发酵过程中未出现酸化现象; 混合发酵对破坏互花米草沼渣纤维素的结晶区有利,促进效果在1.13%~21.61%. |
| 英文摘要 |
| The characteristics of Spartina alterniflora residue after producing methane (SAR) digested alone and co-digestion of various proportions of chicken manure and SAR were investigated by batch model at 35℃±1℃. The initial total solid (TS) loading of all treatments was 8.0%. The results indicated that there was still some biogas produced by SAR with TS biogas yield of 107.25 mL·g-1 and average methane content of 76.92%. The cellulose crystallinity of re-digested SAR was destructed by anaerobic microorganisms, and the destruction rate was 5.55%. Co-digestion meliorated the environment where microorganisms lived in and increased the cumulative biogas yield. When the ratio of chicken manure to SAR was 4∶1, the cumulative biogas yield was highest while the cumulative biogas yield of T1 (the rate of chicken manure to SAR is 5∶0 based on TS), T3-T6 (the rate of chicken manure to SAR are 3∶2, 2∶3, 1∶4 and 0∶5 based on TS, respectively) were 61.31%, 62.09%, 52.15%, 39.74% and 31.67% of it. The anaerobic fermentation type of co-digestion is mix acid type fermentation. Co-digested with chicken manure promoted the destruction of cellulous crystallinity by 1.13%-21.61% and especially when the rate of chicken manure to SAR was 4∶1. |
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