Structure And Function Of Hydrogen Producing-Ethanologens Community

Fermentative bio-hydrogen production of organic wastewater has been attracting attention as an environmentally friendly process that does not consume fossil fuels, and become one of the research focuses in environmental biotechnology. Although the fermentative bio-hydrogen production has a wide potential, this technique is still under the research and development. There is a long way to the industrial production. Many important problems which haven't been solved well restrict the industrialization process. The enhancement of the hydrogen production rate and the stable operation of the system and reducing the production cost are essential to realize the industrialization of fermentative bio-hydrogen production.When activated sludge as inoculums produces hydrogen, microbial community structure plays a key role for hydrogen producing in the reactors. Thereforeelucidating relationship of structure and function of microbial communities by modern molecular biological techniques, determining important functional populations for hydrogen producing, developing a quick molecular detection system of hydrogen-producing community, and realizing directional establishment and optimization of community with high efficient hydrogen production will make an important theoretical significance and practical value. At present, these contents have not been investigated yet. High efficient hydrogen-producing populations are essence of enhancing hydrogen production of reactors. Increases of hydrogen production efficiency and stability of operation are favored by putting high efficient hydrogen-producing bacteria. However, almost reported hydrogen-producing bacteria haven't the aggregative ability, and running out resulted in depression of hydrogen production efficiency in reactors. Carrier immobilization of hydrogen-producing bacteria increases the cost of reactor operation. So isolating auto-aggregative bacteria with high efficient hydrogen production and forming granule, realizing establishment of community structure with high efficient hydrogen production by bioaugmentation will make an important practical significance and value for realizing of industrialization of fermentative bio-hydrogen production.