【摘要】 对生物制氢反应器乙醇型发酵和丁酸型发酵的产氢能力及其生态学特性进行了对比分析.结果表明,NADH/NAD+平衡调节是影响不同发酵类型产氢差异的主要原因.在有机负荷为40 kg/(m3.d)条件下,乙醇型产酸发酵菌群表现出较高的产氢能力,最大比产氢速率为550 m l/(gVSS.d),是丁酸型产酸发酵菌群比产氢速率的3.3倍.综合两种发酵类型特性、运行操作条件和制氢成本考虑,乙醇型发酵更适合作为生物制氢工业化生产的发酵类型.更多还原

【Abstract】 Hydrogen production capacity and ecological characteristics of ethanol-type and butyrate-type fermentation were investigated in continuous-flow reactor.It was found that NADH/NAD~+equilibrium was the main reason leading to the difference on hydrogen production capacity in the two fermentation types.At organic loading rate(OLR) of 40 kg/(m~3·d),microflora of ethanol-type fermentation had relatively high hydrogen production rate,and the maximum specific hydrogen production rate was 550 ml/(gVSS·d),which was 3.3 times higher than that of butyrate-type fermentation.Ethanol-type fermentation is more suitable for biohydrogen industrialization than butyrate-type fermentation based on their fermentative characters,operating conditions and costs.更多还原