Development of utilization method for unused biomass using marine lactic acid bacteria

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To utilize effectively chitin and the associated materials which is one of unused biomass, availability of chitin-associated sugars in lactic acid bacteria, Lactococcus lactis, derived from marine fish was compared with those from other sources, such as cheese starter and freshwater fish. As the results, fermentation of chitin oligosaccharides in the strains derived from fish were observed in the media containing GlcNAc-(GlcNAc)_6, whereas those from cheese starter were observed in GlcNAc-(GlcNAc)_3. In addition, ratio of optical isomer in products for L-lactic acid in marine fish derived strain culture was higher than those in other sources. Furthermore, the amount of L-lactic acid in marine strain culture was 3.5-4.4 folds higher than those in other sources.