Effects of Natural Polymer Acetylation on the Anaerobic Bioconversion to Methane and Carbon Dioxide

C. J. Rivard, W. S. Adney, M. E. Himmel, D. J. Mitchell, T. B. Vinzant, K. Grohmann, L. Moens, H. Chum

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41 Scopus Citations


The successful production of novel biodegradable plastic copolymers incorporating both synthetic plastic formulations, such as polystyrene, and naturally occurring biodegradable polymer components, such as cellulose, starch, or xylan, requires stable chemical bonding between these polymers. Modification of the natural polymers through acetylation of the available hydroxyl groups permits the formation of appropriate film-forming plastic copolymers. However, modification of natural polymers has been demonstrated to result in decreased attack by microbial catalysts. For this study, the abundant natural polymers cellulose, starch, and xylan were substituted with acetate to various degrees, and the effect of this modification on the anaerobic biodegradation was assessed using the biochemical methane potential (BMP) protocol. Significant reduction in anaerobic biodegradability resulted with all polymers at substitution levels of between 1.2-1.7. For the xylan acetate series, the trends for anaerobic biodegradation were in good agreement with reduced enzymatic hydyolysis using commercially available xylanase preparations.

Original languageAmerican English
Pages (from-to)725-736
Number of pages12
JournalApplied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology
Issue number1
StatePublished - 1992

Bibliographical note

Prepared for the 13th Symposium on Biotechnology for Fuels and Chemicals, 6-10 May 1991, Colorado Springs, Colorado

NREL Publication Number

  • ACNR/JA-422-13266


  • Acetylation
  • anaerobic
  • cellulose
  • digestion
  • starch
  • xylan
  • xylanase


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