Butyric acid production using untreated algal biomass
- Butyric acid production using untreated algal biomass
- 오현주; 김세일; 오민규; 우한민; 엄영순
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- The butyrate-producing enrichment culture using untreated brown algae (Laminaria japonica) was established. The tidal flat sediment was used as an inoculum for the enrichment culture and the microbial structure of the enrichment culture was investigated using pyrosequencing. Although the microbial community was changed very dramatically, Vibrio spp. or Clostridium spp. were dominant genera. The relationship between microbial community and fermentation products suggested that the brown algae were initially degraded by Vibrio spp. and butyrate was produced from degraded algae by Clostridium spp. To investigate utilization of brown algae by Clostridium alone, 13 C. tyrobutyricum strains were cultivated with untreated brown algae as sole carbon source. Comparing butyrate production of the enrichment culture with that of pure culture, the enrichment culture produced more butyrate (4 g/L) than pure culture of C. tyrobutyricum (0.2 ~ 1.8 g/L), indicating that mixed culture from tidal flat sediments produced butyric acid from untreated algal biomass more efficiently than pure culture probably because of microbial interaction between Vibrio spp. and Clostridium spp. in mixed culture
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