| 生物载体强化的连续流生物制氢反应器的运行特性 |
| 摘要点击 1292 全文点击 993 投稿时间：2005-06-12 修订日期：2005-07-27 |
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| 中文关键词 生物制氢 生物载体 产甲烷 pH 发酵类型 |
| 英文关键词 bio-hydrogen production support carrier methanogenesis pH fermentation type |
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| 中文摘要 |
| 在连续流搅拌槽式反应器(CSTR)中填加比重为1.54 g/cm3,粒径小于2mm的多孔物质,以糖蜜废水为底物利用活性污泥制取氢气.考察了填加生物载体后生物制氢反应器连续流稳定运行的系统特性.研究表明,投加生物载体能够扩大产氢细菌的活性范围,提高系统的抗冲击负荷能力和耐低pH值的能力,增加系统稳定性,并且可使系统在低HRT下保持较高的生物量.此连续流生物制氢反应系统的最佳发酵类型为乙醇型发酵,适宜的pH值范围为3.8～4.4,气相中的氢气含量约为40%～57%,最大产氢速率为0.37L/(g·d).降低pH值可抑制厌氧发酵过程中出现的产甲烷菌群,加速产氢反应器的启动. |
| 英文摘要 |
| A kind of granular activated carbon,whose granular size is no more than 2mm and specific gravity is 1.54g/cm3,was used as the support carrier to allow retention of activated sludge within a continuous stirred-tank reactor(CSTR) using molasses wastewater as substrate for bio-hydrogen production.Continuous operation characteristics and operational controlling strategy of the enhanced continuous bio-hydrogen production system were investigated.It was indicated that,support carriers could expand the activity scope of hydrogen production bacteria,make the system fairly stable in response to organic load impact and low pH value(pH<3.8),and maintain high biomass concentration in the reactor at low HRT.The reactor with ethanol-type fermentation achieved an optimal hydrogen production rate of 0.37L/(g·d),while the pH value ranged from 3.8 to 4.4,and the hydrogen content was approximately 40%～57% of biogas.It is effective to inhibit the methanogens by reducing the pH value of the bio-hydrogen production system,consequently accelerate the start-up of the reactor. |
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