| 温度对厨余垃圾两相厌氧消化中水解和酸化过程的影响 |
| 摘要点击 2784 全文点击 1484 投稿时间：2005-09-12 修订日期：2005-11-03 |
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| 中文关键词 厌氧 水解 酸化 温度 厨余废物 |
| 英文关键词 anaerobic hydrolysis acidogenesis temperature kitchen wastes |
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| 中文摘要 |
| 实验考查了厨余垃圾在4个温度(25℃、37℃、40℃、50℃)条件下的水解率、挥发酸(VFA)产量和速率、乳酸产量和有机酸的组成.结果表明:温度对水解和酸化过程均有较大影响,在小于37℃范围内水解率和酸化率均随温度升高而增加,最大的VFA浓度在37℃下获得,达34.4g/L.超过37℃,酸化率下降而水解率继续增加,最大水解率在50℃下获得达82%.VFA中以甲酸和乙酸为主,并有少量丙酸和丁酸产生,同时乳酸浓度一直较高.通过实验确定了厨余垃圾水解酸化过程的最优温度条件为37℃. |
| 英文摘要 |
| The experiment evaluated the solubilization rate and VFA production rate of kitchen wastes with controlled-temperature at 25℃,37℃,40℃ and 50℃,and subsequently investigated the lactic acid production and constituents of individual organic acids at various temperature levels.Results show that the increase of temperature when below 37℃ may improve both hydrolysis and acidogenesis rates and acidogenesis rate decreases while hydrolysis rate increases above 37℃.The maximum VFA concentration of 34.4(g·L-1) was achieved at 37℃ and a higher hydrolysis rate of 82% was obtained at 50℃.Formic and acetic acid were predominant VFA,while propionic and butyric acid took a relatively little part.And lactic acid concentration remained relatively high.Accroding to the experiment an optimum temperature to optimize both hydrolysis and acidification is 37℃. |
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