Effects of alternative energy sources on bacterial cellulose characteristics produced by Komagataeibacter medellinensis

Carlos Molina-Ramírez*, Carla Enciso, Mabel Torres-Taborda, Robin Zuluaga, Piedad Gañán, Orlando J. Rojas, Cristina Castro

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)


Bacterial cellulose (BC) was produced by Komagataeibacter medellinensis using Hestrin and Schramm modified medium in the presence of alternative energy sources (AES), such as ethanol and acetic acid, to explore the effect of AES on the characteristics and properties of the resulting BC. In this study, the physicochemical and structural characteristics of the obtained BC were determined using Fourier-transform infrared spectroscopy, X-ray diffraction spectrometry, thermogravimetric analysis, and mechanical testing analysis. Ethanol and acetic acid (at 0.1 wt%) were proven to improve the BC yield by K. medellinensis by 279% and 222%, respectively. However, the crystallinity index (%), the degree of polymerization, and maximum rate of degradation temperatures decreased by 9.2%, 36%, and 4.96%, respectively, by the addition of ethanol and by 7.2%, 27%, and 4.21%, respectively, by the addition of acetic acid. The significance of this work, lies on the fact that there is not any report about how BC properties change when substances like ethanol or acetic acid are added to culture medium, and which is the mechanism that provokes those changes, that in our case we could demonstrate the relationship of a higher BC production rate (provoked by ethanol and acetic acid adding) and changes in BC properties.

Original languageEnglish
Pages (from-to)735-741
Number of pages7
JournalInternational Journal of Biological Macromolecules
Publication statusPublished - 1 Oct 2018
MoE publication typeA1 Journal article-refereed


  • BC properties
  • Physical characterization
  • Production rate
  • Yield improvement


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