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KMID : 0380020160310010085
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Korean Journal of Biotechnology and Bioengineering
2016 Volume.31 No. 1 p.85 ~ p.89
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Production of Lactic Acid from Water Hyacinth by Lactobacillus spp.
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Jullihar Randy
Noh Yong-Ho
Park Hye-Min
Yun Hyun-Shik
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Abstract
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Lactic acid fermentations were conducted using water hyacinth. It is known that the pretreatment and enzyme hydrolysis process optimize the potential of water hyacinth. Lactic acid produced by using lactic acid bacteria. All cells were grown at 37oC and initial pH 5.5. Lactic acid production was measured by HPLC. All Lactobacillus strains could produce lactic acid from pretreated water hyacinth. The highest lactic acid was achieved when lactic acid fermentation was carried out by L. delbrueckii for D-form and L. helveticus for L-form lactic acid production. The lactic acid concentration was 10.70 g/L by L. delbrueckii and it converted glucose in the medium to lactic acid, almost perfectly. Lactic acid production became higher when fermentation was carried out at a controlled pH 5.5. Lactic acid yield and productivity were 0.52 g/g and 0.19 g/L/h for L. helveticus, while L. delbrueckii was 0.64 g/g and 0.27 g/L/h. This study showed that water hyacinth medium could be alternative medium which can replace the complex and expensive medium for growing Lactobacillus strains in production of lactic acid.
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KEYWORD
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Water hyacinth, Lactic acid, Alternative medium, Lactobacillus
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