不同产酸发酵菌群产氢能力的对比与分析

Comparison and Analysis of Hydrogen Production Capacity with Different Acidogenic Fermentative Microflora

重点对乙醇型发酵菌群和丙酸型发酵菌群的产气及产氢能力进行了对比研究 ,并对发酵菌群由丙酸型演替为乙醇型过程中的产氢速率变化进行了分析 .在有机负荷相同的条件下 ,乙醇型发酵菌群表现出较高的产氢速率和比产氢速率 ,最大产氢速率为 1 4 99L/d ,最大比产氢速率为 3 5 86 4 5mmol/ (kg·d) .而丙酸型发酵菌群产氢速率和比产氢速率都较低 ,分别为 3 62L/d ,1 96 4 6mmol/ (kg·d) .生物制氢反应器在运行中维持乙醇型发酵更有利于获得较高的氢气产量 。

The biogas(hydrogen) production capacity of ethanol type and propionic acid type fermentative microflora were compared, and the movement of hydrogen production rate according to the succession of microflora from propionic acid type to ethanol type was investigated. It was demonstrated that under the same loading rate, microflora of ethanol type fermentation had relatively high hydrogen production rate and specific hydrogen production rate, maximum hydrogen production rate was 14.99L/d,maximum specific hydrogen production rate was 3586.45mmol/(kg·d).While, for the microflora of propionic acid type fermentation, hydrogen production rate and specific hydrogen production rate were extremely low, maximum hydrogen production rate was 3.62L/d,maximum specific hydrogen production rate was 196.46mmol/(kg·d).In order to obtain high yield of H\-2 in the fermentation process,ethanol type fermentation was preferred and propionic and type fermentation had to be avoided.