研究论文
刘晓烨,张洪,李永峰,郭子瑞,万松.复合式厌氧折流板反应器作为制氢系统的乙醇型发酵调控研究[J].环境科学学报,2014,34(4):881-887
复合式厌氧折流板反应器作为制氢系统的乙醇型发酵调控研究
- Ethanol type fermentation control with hybrid anaerobic baffled reactor as the hydrogen production system
- 基金项目：国家自然科学基金（No.50808152）
- 作者
- 单位
- 刘晓烨
- 东北林业大学 林学院, 哈尔滨 150040
- 张洪
- 东北林业大学 林学院, 哈尔滨 150040
- 李永峰
- 东北林业大学 林学院, 哈尔滨 150040
- 郭子瑞
- 哈尔滨工业大学 市政环境工程学院, 哈尔滨 150090
- 万松
- 东北林业大学 林学院, 哈尔滨 150040
- 摘要：乙醇型发酵被认为是产氢发酵类型中的最佳选择.以赤糖废水为底物，进行了五格室、总有效容积为43.2 L的复合式厌氧折流板反应器作为制氢系统的乙醇型发酵调控研究.为期64 d、3个阶段的实验结果表明，以好氧活性污泥作为接种污泥，在水力停留时间为12 h、进水pH为5.0~7.0之间、温度为35 ℃±1 ℃的条件下，通过分阶段提高进水COD的方式，可使HABR系统在启动阶段培育出具有稳定产氢效能的乙醇型发酵菌群体系.由于废水进入每一个格室的状态不同，每个格室形成的微生物菌群结构不同，虽然也都形成了乙醇型发酵，但是产氢能力有所差异，第二格室产氢量最高.系统第二阶段，COD为6500 mg·L-1时，平均COD去除率为43.34%，平均产氢量为14.91 L·d-1，此阶段效果最佳.在第三阶段，COD过高，系统产氢量与COD去除率出现下降，但产氢系统并没有崩溃.系统可同时生产氢和乙醇，其能量值在第二阶段达到最高值，平均为3340.62 kJ·d-1.在不同的COD条件下，氢气与乙醇生产速率的线性关系为y（氢）= 0.351x（乙醇）-0.181（R2=0.9767）.
- Abstract：Ethanol type fermentation was recognized as the best choice of fermentation hydrogen production types. The control of Ethanol type fermentation with Hybrid Anaerobic Baffled Reactor (HABR) as the hydrogen production system using brown sugar wastewater was investigated in a five-compartment HABR with an effective volume of 43.2 L. The result of three stages experiment of 64 days showed that using oxic activated sludge as seed sludge with hydraulic retention time of 12 h, the influent pH of 5.0~7.0, the temperature of 35 ℃±1 ℃, and the increase of anaerobic mixed cultures under the influent COD in a phased operation mode, the system of ethanol type fermentation bacteria with stable capability of hydrogen production could be achieved in the start-up phase. As the conditions of wastewater of each compartment were different, the hydrogen production capacity of ethanol type fermentation was also different, with the highest capacity in the second compartment. In the second stage with COD of 6500 mg·L-1, the best effectiveness was achieved with the average COD removal of 43.34% and the average hydrogen production of 14.91 L·d-1. In the third stage with increasing COD, the COD removal and the hydrogen production decreased without breakdown. The hydrogen and the ethanol could be produced simultaneously, and the optimum energy production rate was 3340.62 kJ·d-1 and occurred at COD of 6500 mg·L-1. Linear regression showed that hydrogen and ethanol production rate were proportionately correlated at all COD levels which could be expressed as y(H2)=0.351x(ethanol)- 0.181 (R2=0.9767).
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