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KMID : 0364820140500030227
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Korean Journal of Microbiology
2014 Volume.50 No. 3 p.227 ~ p.232
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Effect of Acetic Acid Concentration and Mixed Culture of Lactic Acid Bacteria on Producing Bacterial Cellulose Using Gluconacetobacter sp. gel_SEA623-2
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Kim Kyung-Min
Kim Ji-Hyeon
Yang Kyong-Wol
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Abstract
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In this study, Gluconacetobacter sp. gel_SEA623-2 isolated from citrus that produces bacterial cellulose was used to
examine the effect of initial concentration of acetic acid and mixed culture inoculated with Lactobacillus plantarum
KCCM 80077 on productivity of bacterial cellulose. In mixed culture added with 0.5% acetic acid, the viable cell
count increased from 2.4 × 106 CFU/ml to 1.1 × 107
CFU/ml after 14 days of culture, and total acidity was about
0.3% higher than single culture added with 0.5% acetic acid, which implies that additional lactic acid was produced
by L. plantarum KCCM 80077. In single culture, although bacterial cellulose productivity was higher when the
initial concentrations of acetic acid were 0.0% and 0.5%, than when it was 1.0%, there was no significant difference.
However, in mixed culture, adding 0.5% acetic acid resulted in dry weight of 37.83±6.81 g/L and thickness of
10.33±0.58 mm, showing a significant difference from that of single culture added with 1% acetic acid, 28.40±1.23
g/L and 7.50±0.50 mm (P<0.05).
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KEYWORD
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Gluconacetobacter sp., bacterial cellulose, fermentation, lactic acid bacteria, mixed culture
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