Bacterial cellulose as a support for yeast immobilization – Correlation between carrier properties and process efficiency
2019
Żywicka, Anna | Banach, Anna | Junka, Adam F. | Drozd, Radosław | Fijałkowski, Karol
The aim of the current study was to analyze physicochemical properties of bacterial cellulose (BC) produced by Komagataeibacter xylinus for various periods of time in stationary conditions with regard to its potential as a carrier for yeast (Saccharomyces cerevisiae and Yarrowia lipolytica) immobilization, and subsequently to correlate the relationship between these properties and the efficiency of the immobilization process. Physicochemical properties of BC, depending on the time of its biosynthesis, were as follows: surface area 7.21–11.04 m2/g, pore volume 3.11–3.96 cm3/g, pore diameter 0.011–0.109 nm, water holding capacity 32–64%, water relies capacity 10600–33400%, swelling ratio 132–389%, polymerization degree 2260–4780 and total crystallinity index 1.22–1.96 (3–30 days, respectively). The linear regression analysis showed that number of immobilized yeasts increased with values of surface area, pore size, pore diameter, swelling ratio, water release capacity and polymerization degree. The opposite trend was observed in case of water holding capacity and total crystallinity index. The analysis of physicochemical properties of BC performed in the current study have significant translational implications for understanding the relationships between BC-based carriers and the efficiency of yeast immobilization.
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