玉米秸秆发酵浸出液模拟废水发酵产氢的放大实验研究  

Enlargement Test Studies of Bio-hydrogen Production Using Artificial Wastewater of Corn Stalk Fermentation Lixivium by Mixed Culture

作　　者：张茂林[1] 魏瑞霞[1] 樊耀亭[1] 杏艳[1] 侯红卫[1] 

机构地区：[1]郑州大学化学系,郑州450052

出　　处：《环境科学》2007年第8期1889-1893,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2005CB214500;2006CB708407);国家自然科学基金项目(90610001)

摘　　要：在20 L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分配制模拟废水,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11.80 mol/kg、56%和8.81 L/(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.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 20 L half-continuous flow fermenter. The influences of several environmental factors on the bio-hydrogen production, such as HRT, C/N ratio, Fe^2＋ and artificial corn stalk wastewater concentration were discussed in the tests. The experimental, results showed that HRT, C/N ratio, Fe^2＋ and artificial corn stalk wastewater concentration significantly affected the fermentation hydrogen production. The maximum H2 yield of 11.80 mol/kg, H2 concentration of 56% and hydrogen production rate of 8.81 L/（L· d） were obtained at HRT = 10 h, C/N = 100, Fe^2＋ concentration of 100 mg/L and substrate concentration of 12.5 g/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. The main by-products in the liquid phase were acetic acid, butyric acid, propionic acid and a little ethanol and butanol throughout this study.

关 键 词：秸秆模拟废水 放大实验 发酵 产氢 

分 类 号：X382[环境科学与工程—环境工程]