优势产氢-产酸发酵类型的建立及比较  

Establishment and comparation for the predominant hydrogen production-acidogenic fermentation types

作　　者：宋佳秀[1] 任南琪[1] 段志杰[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《给水排水》2006年第z1期79-83,共5页Water & Wastewater Engineering

基　　金：国家自然科学基金(30470054);国家973项目(G2000026402)

摘　　要：利用两套连续流搅拌槽式生物制氢反应器(CSTR),采用优化的启动参数,实现了优势产氢-产酸发酵类型(乙醇型和丁酸型)的启动和稳定运行;计算两者的投碱量,发现维持丁酸型发酵所消耗的碱是维持乙醇型发酵的7倍;在稳定运行阶段,在相同进水COD负荷情况下,两个反应器的产气及产氢能力基本相当,日产氢量在11．3-14．5 L范围内,而丁酸型发酵的生物持有量为乙醇型的1．8倍,而乙醇型发酵菌群的比产氢速率要高于丁酸型,分别为平均21．2 mol／(kgVSS·d)和11．1 mol／(kgVSS·d)。试验证明,乙醇型发酵茵群具有更宽的pH耐受幅,因此对环境的适应能力更强。Two predominant hydrogen production and acidogenic fermentation types startup and operation were realized successfully in certain pH by adjusting inlet alkalinity in two CSTRs. By calculating the amounts of alkalinity during steady operation, it was found that the consumed alka linity for maintaining butyric acid fermentation was seven times than that for ethanol fermentation. In this stage, with the same inlet CODlloading the amounts of gas production and hydrogen produc tion were similar about 11. 3-14. 5 L/d. The biomass in butyric acid fermentation reactor was accounted about 1. 8 times more than that in ethanol fermentation reactor. As a result, the specific hydrogen production rate for ethanol fermentation was 21. 2 mol/(kgVSS·d)averagely and the other was 11. 1 mol/(kgVSS·d) averagely. The result showed ethanol fermentative microflora was more adaptable with pH extent and its ambient.

关 键 词：生物制氢 氢经济 比产氢速率 荧光原位杂交 

分 类 号：TU991[建筑科学—市政工程] TU992