Self floculation hydrogen producing bacteria and its sieving method

Abstract

A self-flocculating hydrogen-producing bacterium relates to a new species of hydrogen-producing bacteria. In order to further improve the hydrogen production capacity of the system, it is necessary to separate the self-flocculating bacteria that can produce hydrogen efficiently, have strong acid resistance, and become a dominant growth, which has more practical significance and engineering application value. The self-flocculation hydrogen-producing bacterium of the present invention is named as Ethanologenbacterium Harbin W-1 (Ethanologenbacterium Harbin W-1), and the preservation number is CGMCC1151. The screening method of self-flocculation hydrogen-producing bacteria is characterized in that a new culture medium is used in the screening process. The self-flocculation hydrogen-producing bacterium Harbin Ethanologen W-1 of the present invention is a bacterium with high hydrogen production efficiency, strong flocculation ability and acid resistance. Body, 0.5-1.0mm in diameter, the medium is completely clarified.

Description

Technical field: [0001] The invention relates to a new species of hydrogen-producing bacteria. Background technique: [0002] Biological hydrogen production technology is one of the important means to solve the energy crisis and environmental pollution problems. Due to its dual efficacy and sustainability, it has been increasingly valued by countries all over the world. Improving the efficiency of hydrogen production is an urgent problem to be solved in the industrialization of biohydrogen production technology. Screening efficient hydrogen-producing bacteria is an effective way to accelerate the industrialization of biological hydrogen production. In order to obtain efficient hydrogen-producing fermentation bacteria, foreign researchers isolated a large number of hydrogen-producing fermentation bacteria, and most of the isolated hydrogen-producing fermentation strains were concentrated in Clostridium and Enterobacter. Kumar et al. isolated Enterobacter cloacae (Enterobact...

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Problems solved by technology

[0004] Because the growth conditions of the hydrogen production reactor are different from those of the static culture, especially the pH of the reaction system during the acidogenic fermentation process is low, so although the high-efficiency fermentative bacteria isolated so far have high hydrogen production capacity, they cannot It often cannot achieve its optimal hydrogen production and growth conditions. High-efficiency hydrogen-producing bacteria cannot become the dominant population in the microbial community. They can only be immobilized, which limits their hydrogen production efficiency and increases operating costs.

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