摘要
研究了零价铁和二价铁离子对纯菌种R3及混合菌种生长与产氢作用的影响。在纯菌种间歇试验中,当添加零价铁浓度为100mg/L时,R3氢气含量的最大值为47%,而添加二价铁离子浓度为100mg/L时,R3氢气含量的最大值为45%,零价铁在浓度范围为0.4～100mg/L时对R3产氢的促进作用较明显,而在添加的零价铁和二价铁离子浓度分别大于100mg/L和200mg/L时,则都呈现了"反馈抑制"的现象,但是高浓度的零价铁对R3的"毒害"作用与二价铁离子相比也较低。在混合菌种连续流试验中,添加了零价铁的反应器Ⅰ运行至第4天时,出水pH值下降至4.3,达到了乙醇型发酵状态,氢气含量最大值为27%;而添加二价铁离子的反应器Ⅱ则是运行至第8天时,出水pH值才达到了乙醇型发酵状态,氢气含量最大值为26%。零价铁对混合菌种连续流试验的产氢促进作用同样优于二价铁离子。
This study investigated the effects of Fe and Fe^2＋ on the hydrogen production with the R3 strain and mixed culture. In the batch experience, the maximum hydrogen concentration was 47% when the concentration of Fe was 100mg/L, while the hydrogen concentration changed to be 45% when the concentration of Fe^2＋ was 100mg/L. When the concentration of Fe ranges between 0. 4- 100mg/L, the hydrogen production was obviously promoted on R3. The phenomenon of ＂Feedback inhibition＂ appeared when the concentration of Fe and Fe^2＋ was larger than 100mg/L and 200mg/L respectively, but the inhibition of Fe to R3 was lower than Fe^2＋.In the continuously mixed culture, when the reactor Ⅰ with Fe worked at the forth day, the maximum hydrogen concentration reached 27 % with the pH droped to 4.3 and showed the ethanol-type fermentation. While the reactor Ⅱ with Fe^2＋ got the ethanol-type fermentation after working eighth days with the maximum hydrogen concentration reached 26%. We drew a conclusion that Fe is better to promote hydrogen production than Fe^2＋.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2009年第4期551-557,共7页
Acta Energiae Solaris Sinica
基金
上海市重点科技攻关项目(071605122)
国家高技术研究发展计划(863)项目(2006AA05Z109)
