| abstract |
The invention provides a preparation method of calcium ferrite and its application in dark fermentation to produce H 2 . CaFe 2 O 4 particles are added into a dark fermentation reaction system, fermented at 35-37° C., and H 2 is collected. The present invention applies CaFe 2 O 4 granules to the dark fermentation process for the first time to produce H 2 , the CaFe 2 O 4 granules have good biocompatibility, and the CaFe 2 O 4 granules can selectively improve the microbial activity in the dark fermentation system, Promote the growth of H2 -producing bacteria, optimize the microbial community structure of the fermentation system, and increase H2 production. CaFe 2 O 4 particles can slowly release a small amount of calcium and iron ions in water, which can make up for the defects of low bioavailability of trace elements, inhibition of metabolites, and low microbial activity in the fermentation process. |