为提高果汁发酵生产细菌纤维素的产量，开发特色纤维素功能性食品，以葡糖醋杆菌CGMCC 3917为实验菌种，以苹果汁和梨汁为发酵培养基生产细菌纤维素（BC），研究果汁用量和酵母膏添加量对细菌纤维素产量的影响，比较分析两种果汁生产的细菌纤维素在产量、结构和性质方面的差别。结果表明：梨汁发酵生产的细菌纤维素产量明显高于苹果汁，可达46．343g／100mL；其BC干膜复水率显著高于苹果汁，BC干膜的总糖含量稍高于苹果汁。两种果汁发酵生产的细菌纤维素在湿膜持水量及干膜的纤维素含量、蛋白质含量、脂肪含量以及微观结构上没有明显差异。%To improve bacterial cellulose （BC） production and to develop specific cellulose functional food products, BC was prepared from the fermentation of apple juice or pear juice by Gluconoacetobacter hanseni CGMCC 3917. The influence of fruit juice dilution and amount of added yeast extract on BC yield was evaluated. Meanwhile, further studies were done to investigate the influence of fruit juice type on BC production, structure and properties. The results showed that pear juice provided more production of BC than apple juice, reaching 46.343 g/100 mL. Moreover, dried BC membranes from pear juice showed a significantly higher rehydration rate, and a slightly higher total sugar content than those from apple juice. There were no pronounced differences in water content of wet BC membranes and cellulose, protein and fat contents and microstructure of dry BC membranes between both fruit juices.
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