| 玉米秸秆发酵浸出液模拟废水发酵产氢的放大实验研究 |
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| 中文关键词 秸秆模拟废水 放大实验 发酵 产氢 |
| 英文关键词 artificial corn stalk wastewater enlarged experiment fermentation hydrogen production |
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| 中文摘要 |
| 在20L的半连续流发酵罐中，以牛粪堆肥为产氢菌源，按照玉米秸秆发酵浸出液的主要成份配制模拟废水，考察和分析了几个关键环境因素对发酵产氢的影响。结果表明，HRT、C/N、Fe2+浓度和模拟废水浓度对发酵产氢均有不同程度的影响。在本实验条件下，秸秆模拟废水的氢产量、氢浓度和产氢速率分别为11.80mol/kg、56%和8.81L/(L?d)，底物转化率大于90%，废水中COD去除率为39.40%。在整个发酵产氢过程，液相主要发酵副产物为丁酸、乙酸和丙酸以及少量的乙醇和丁醇。 |
| 英文摘要 |
| Conversion of artificial corn stalk wastewater, which was prepared according to the main composition of the corn stalk fermentation lixivium, into bio-hydrogen gas by mixed culture was performed in a 20L half-continuous flow fermenter. The influences of several environmental factors on the bio-hydrogen production, such as HRT, C/N ratio, Fe2+ and artificial corn stalk wastewater concentration were discussed in the tests. The experimental results showed that HRT, C/N ratio，Fe2+ and artificial corn stalk wastewater concentration significantly affected the fermentation hydrogen production. The maximum H2 yield of 11.80mol/kg, H2 concentration of 56％and hydrogen production rate of 8.81L /(L?d) were obtained at HRT＝10h，C/N＝100，Fe2+concentration of 100mg/L and substrate concentration of 12.5g/L by mixed culture, respectively. In the fermentation hydrogen-producing process, the conversion efficiency of the substrate was more than 90%, and 39.40% of COD was removed from the reactor, and main by-products in the liquid phase were acetic acid, butyric acid , propionic acid and little ethanol and butanol throughout this study. |
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