酸碱预处理对三球悬铃木落叶同步糖化发酵产氢的影响

Effect of Acid and Alkaline Pretreatment on Simultaneous Saccharification Fermentation for Bio-hydrogen Production from Platanus orientalis Leaves

对三球悬铃木(俗称法国梧桐)落叶酸碱预处理及其同步糖化发酵产氢工艺进行实验研究,利用修正的冈珀茨模型(Gompertz model)对产氢曲线加以拟合,以累积产氢量和产氢速率为考察指标,研究不同酸碱预处理方法(添加质量分数为2%、4%、6%、8%的H2SO4和Ca(OH)2)对三球悬铃木落叶光合生物产氢性能的影响规律,优化出最佳酸碱预处理工艺条件为:稀酸预处理后的落叶试样的产氢性能优于氢氧化钙预处理后的落叶试样,其中H2SO4质量分数为4%时处理效果最佳,发酵产气中的氢气最大体积分数达66.34%,累积产氢量为369 m L,最高产氢速率11.03 m L/h。稀酸处理液可以实现3次有效回收利用。

This study mainly investigated the effect of acid and alkaline pretreatment on Platanus orientalis （known as the French phoenix） leaves, and also the simultaneous saccharifieation and photo- hydrogen production from the leaves were pretreated with acid and alkali of different concentrations. Taking cumulative hydrogen production and hydrogen production rate as assessment indicators, the photo- hydrogen production capabilities from leaves with different pretreatments were compared and the modified Gompertz equation was used to analyze hydrogen production process. The results showed that HE SO4 pretreatment could effectively improve the performance of photo-hydrogen production comparing with Ca（OH）2 pretreatment, and the 4% H2 SO4 pretreatment was the best pretreatment. The maximum hydrogen concentration, the cumulative hydrogen production and the highest specific hydrogen production yield rate were 66.34%, 369 mL, 11.03 mL/h, respectively. The exploratory research was carried out about the dilute acid treatment liquid for recycling and reducing the cost of preprocessing.