| With the rapid development of the world economy and the rapidincrease in population, a large number of mining and use of fossil energy bringingenergy shortage and environmental pollution, has prompted human more attention tothe development and utilization of new energy. And with its generating only waterwhen burning, producing no contaminants, and high energy density,low cost oftransportation,Hydrogen is considered the cleanest energy. Today, photosyntheticbio-hydrogen is regarded as one of the most potential of the hydrogen productiontechnical. At present photosynthetic biological hydrogen production technology hasbeen gradually mature, many domestic and foreign scholars research and discuss onavariety of problems of photosynthetic bio-hydrogen, but there is much little researchon the influence of adding promoting agents, inhibitors and some metal solution in theprocess of photosynthetic bio-hydrogen.The article based on National National Science Fund Project"superfine stalkbiomass photosynthetic continuous hydrogen production process and metabolic heatresearch"(project numbei:50976029).This article studies on the influence of addingiron, nickel, zinc three kinds of metal ions solution in the process of photosyntheticbio-hydrogen. We know, iron, nickel, zinc is a class of essential nutrients of microbialgrowth,and play an important role in their biological macromolecules and to maintainthe stability of the cellular structure.Therefore, discussing the effects of iron, nickel,zinc three kinds of metal ions of photosynthetic biological hydrogen production canprovide some reference and basis for hydrogen production scale.This paper studiesphotosynthetic bacteria growth after adding the iron, nickel,zinc every single factor ofphotosynthetic organisms in the process of hydrogen production and yield ofhydrogen.At the same time,through the orthogonal experiment comprehensive thispaper consider significant of influence of the three kinds of metal ion in the process ofphotosynthetic bio-hydrogen. The results show that:(1) The optimal concentration of iron ion is0.45mg/L, too much will result in the hydrogen photosynthetic bacteria death,and restrain hydrogen production; Toolittle will result that promoting effect is not obvious. In this lab, reactor of add iron ionconcentration of0.45mg/L in the experiment, the next day has a maximum of theproduction of hydrogen, is1.1times of blank kind. And adding a certain amount ofiron ion can improve photosynthetic bacteria produce hydrogen production rate andthe active hydrogen.(2) Bivalent nickel ions has certain influence on photosynthetic bacteria growthand hydrogen production,.when adding the concentration range in less than0.006mg/mL nickel standard solution, it can contribute photosynthetic bacteria growth andhydrogen production.And the output of hydrogen content increases10%than blank.At the same time, when adding the concentration range in more than0.006mg/mL.Itwill restrain photosynthetic growth, and that shows the chemistry of the nickel ionshas certain effect in the process of photosynthetic bio-hydrogen.（3）In this lab, the optimal zinc ion concentration is for mg/L, too much willresult in the production of hydrogen photosynthetic bacteria death, and restrainhydrogen production; Too little will result that promoting effect is not obvious.（4）The results of orthogonal test and single factor test showed that the order ofthe factors which affected the yield was: Fe2+>Ni2+>Zn2+.we can see from the meanvisible in the table of all factors level,the optimum technological conditions ofPhotosynthetic bio-hydrogen is for0.35mg/L Fe2+,2mg/LNi2+,Zn2+mg/L. Accordingto the variance analysis, we can conclude that effect of Fe2+on Photosyntheticbio-hydrogen is significant. |
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