摘要
利用厌氧细菌的产酸发酵作用进行生物制氢的生物制氢技术 ,在世界范围内受到普遍重视。然而 ,多数研究都集中在纯菌种的产氢机理上 ,而对混合菌种的研究较少。该文在小试研究成果的基础上 ,利用驯化的厌氧活性污泥进行了中试规模的生物制氢试验研究 ,获得了 30mol/kgVSS .d的持续产氢能力。试验结果表明 ,将运行参数控制在温度 35℃、pH4 0～ 4 5、HRT4～ 6h、ORP - 10 0～ - 12 5mV、进水碱度 30 0～ 5 0 0mg/L (以CaCO3 计 )、容积负荷 35～ 5 5kgCOD/m3 ·d等范围时 ,发酵法生物制氢反应器的最大持续产氢能力可达 5 7m3 /m3 ·d。中试制氢反应器具有良好的抗负荷冲击能力和运行稳定性 ,对制糖废水中的COD去除率可达到 2 0 %以上 ,去除单位COD可获得 2 6mol/kgCOD的产氢率。
The biotechnology of hydrogen production by fermentation of anaerobic bacteria has been stuied world wide for a long time.However,most of the studies were carried out in laboratory to investigate the mechanism of hydrogen evolution using pure cultures of anaerobic bacteria while a few efforts on mixed cluture in this study.Using molasses as material,anaerobic activated sludge was researched.In order to find out the industrialized feasibility of hydrogen bio-production,the ability of hydrogen evolution by anaerobic activated slude and the optimal controls parameters were investigated in a pilot-scale test.The results showed that the domesticated anaerobic activated sludge could give a hydrogen yield as high as 30 mol/kgVSS·d in the pilot reactor.The pilot reactor obtained a hydrogen yield of 5.7m 3/m 3·d continuously under the conditions as following:temperature 35℃,pH 4 0～4 5, HRT 4～6h, ORP -100～-125,effluent alkalinity in terms of CaCO 3 300～500mg/L,volume loading rate 35～55kg COD /m 3·d.The study also indicated that pilot reactor had a better operational stabiltiy and an excellent adaptive capacity for organic loading rate.The rate of COD removal reached at about 20%and a hydrogen production rate of 26mol/kg COD removal was achieved in this study.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2002年第2期252-256,共5页
Acta Energiae Solaris Sinica
基金
国家重点基础研究资助项目 (G2 0 0 0 0 2 64 0 2 )
