Abstract:

Bacterial cellulose (BC) was prepared from lixivium of three distiller’s grains fermented by Acetobacter xylinum. Results showed that the lixivium from three distiller’s grains was rich in nutrients. However, the lixivium from distiller’s grains with rice husk was more suitable to produce BC. The yield of BC was 2.7 g/L when the lixivium with the addition of 2% sucrose was conducted to static fermentation at pH 5.0 and 30 ℃ for 15 days. The pH exhibited an increase trend after fermentation. The structural characteristics of BC were demonstrated using scanning electron microscope (SEM), Fourier transform infrared (FT-IR) spectrum and X-ray diffraction (XRD) with the diameter between 20 nm and 100 nm.

Key words: bacteria cellulose, distilled grains, Acetobacter xylinum, fermentation