| 不同TS浓度互花米草沼渣二次发酵特性研究 |
| 摘要点击 1897 全文点击 1298 投稿时间：2011-01-04 修订日期：2011-03-15 |
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| 中文关键词 互花米草 发酵 产气 挥发性脂肪酸 |
| 英文关键词 Spartina alterniflora anaerobic digestion gas production volatile fatty acid (VFA) |
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| 中文摘要 |
| 中温(35±1)℃条件下，沼渣经6％的NaOH常温下处理48 h后，在TS含量8％、 10％、 12％的条件下沼气发酵.分析了发酵过程中日产气量、累积产气量、甲烷含量、pH值、挥发性脂肪酸(VFA)的变化，从不同角度考察TS含量负荷对沼渣二次发酵特性的影响.单位TS的日产气高峰分别达10、 14、 13 mL·g-1，累积产气率为217、 227、 228 mL·g-1，甲烷含量均在65％以上.发酵过程中最低pH为7.04.乙酸浓度最高分别为3364、 3286、 5728 mg·L-1，丙酸和丁酸浓度均低于1100 mg·L-1.结果表明，沼渣为难降解有机物，分解缓慢，不易出现酸化现象，但仍具有较强的产气潜力. |
| 英文摘要 |
| Biogas residue of Spartina alterniflora treated by NaOH solution for 48h at room temperature was used for secondary anaerobic digestion with TS loading rates were 8%， 10%， 12% at (35±1)℃.The biogas yield,pH,and volatile fatty acid (VFA) were analyzed during the anaerobic digestion.The peak of daily gas production were 10， 14， 13 mL·g-1and the rates of cumulate gas production were 217， 227， 228 mL·g-1 respectively.The methane content exceeded 65% and the lowest pH value was 7.04 during the process.The concentrations of acetic acid concentrations were 3364， 3286， 5728 mg·L-1 respectively while propionic acid and butyric acid concentrations were below 1100 mg·L-1.Biogas residue as a non-degradation organic compound with high potential biogas yield was decomposed slowly and no acid accumulation was not observed. |
