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《Journal of Cellulose Science and Technology》 2014-03
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Improved Production of Bacterial Cellulose from Cassava Starch Hydrolysate and Pretreated Molasses by Agar Addition in a Submerged Mechanical Agitating Fermentation

LAN Shui;TANG Xiao-yan;CHEN Lin;HONG Feng;Group of Microbiological Engineering and Industrial Biotechnology, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University;Nanjing Institute of Environment Sciences,MEP;  
In this study, bacterial cellulose(BC) was produced by Gluconacetobacter xylinus ATCC 23770 in a 3 L mechanical agitating fermenter in which cassava starch hydrolysate or pretreated molasses was used as carbon source and was improved by addition of agar at different concentrations ranging from 0% to 0.8%(w/V). In the fermentation process, BC yield, residual sugar, dissolved oxygen and live cells were determined to explore the effects of addition of different concentrations of agar on BC production. Results showed that, without any agar, the cassava fermentation was better than molasses fermentation and BC yield was 6.8 g/L and 4.8 g/L, respectively. Addition of agar could improved BC yield remarkably. In cassava fermentation, the maximum BC yield was 8.1 g/L after adding 0.2% agar, increased by 19%. Molasses fermentation gained the maximum BC yield of 7.4 g/L by adding 0.6% agar, which was 54% higher than that without agar addition.
【Fund】: 教育部新世纪优秀人才支持计划项目(NCET-12-0828);; 上海市科委项目(11230700600 12nm0500600);; 中央高校基本科研业务费专项资金资助项目
【CateGory Index】: TQ920.6
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