| 不同底物条件下金属离子螯合剂对厌氧消化的影响 |
| 摘要点击 1755 全文点击 1984 投稿时间：2008-07-08 修订日期：2008-08-18 |
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| 中文关键词 厌氧消化 有机酸 金属离子螯合剂 |
| 英文关键词 anaerobic digestion organic acid metal chelating agent |
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| 中文摘要 |
| 借助气相色谱分析，研究了金属离子螯合剂在不同有机酸存在时对厌氧消化的影响.结果表明,螯合剂A的添加可以有
效提高不同有机酸的甲烷产量和产甲烷速率,促进有机酸向甲烷的转化. 当螯合剂A的添加量为10μmoI/L时,丁酸、丙酸和乙酸的甲烷产量分别增加了19.8%、133.0%和45.2%.产甲烷的延滞期也明显缩短,最高产甲烷速率提高了4倍多.丁酸厌氧氧消化的4～8d间,丁酸降解率达56%,同时,气相色谱未检测到乙酸的累积,说明丁酸转化为乙酸后,乙酸很快被产甲烷菌利用.螯合剂A对有机酸产甲烷的促进作用可从酶学上得到支持,以乙酸为例,添加10μmoI/L螯合剂A时,污泥(vss)中辅酶F420含量由空白实验的1.20μmoI/g提高到1.52μmoI/g. |
| 英文摘要 |
| Aided by GC analysis, the effect of metal chelating agent on anaerobic digestion undre different substrates was investigated.The results showed that the addition of cheating agent A could greatly promote the methane production under diffrernt substrates and speed the conversion of organic acid to methane, especially for proionic acid. Whe the dosage of chelating agent A was 10μmoI/L, the methane production was,respectively, 19.8%,133.0% and 45.2% for butyric acid, propionic acid and acetic acid . Also, the arrearage time of methane production was shortened and the produciton rale increased by 4-folod. During 4-8 d operation, the degradation rate of butyric acid reached 56%. The accumulation of acetic acid was not detected by GC analysis, which demonstraed acetic acid converted from buyric acid was quickly utilized by methane producing bacteria. The increase in methane production due to the addition of chelating agent A could be supported by enzymology.taking acetic acid as example, the content of coenzyme F420 in sludge increased to 1.52μmoI/g from1.20μmoI/g to the addition of 10μmoI/L chelating agent A. |
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