Journal
CHEMOSPHERE
Volume 86, Issue 4, Pages 348-353Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2011.09.049
Keywords
Anaerobic degradation; Kinetics; Micro-scale structure; Microcrystalline cellulose (MCC); Crystallinity (Crl)
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Funding
- University of Science & Technology of China
- City University of Hong Kong
- Fundamental Research Funds for the Central Universities
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The degradation kinetics and micro-scale structure change of microcrystalline cellulose during anaerobic biodegradation were investigated. A modified Logistic model was established to properly describe the kinetics, which showed good fitness and wide applicability for cellulose degradation. A maximum degradation rate of 0.14 g L-1 h(-1) was achieved after cultivating for 51.5 h. This result was in good agreement with the scanning electron microscope and X-ray diffraction analysis. Channels of 400-500 nm size started to occur on the crystalline surface of cellulose at around the inflexion time. Accordingly, the crystallinity significantly decreased at this point, indicating a degradation of the crystalline structure zones by anaerobic bacteria. This study offers direct morphological evidence and quantitative analysis of the biodegradation process of cellulose, and is beneficial to a better understanding of the cellulose degradation mechanism. (C) 2011 Elsevier Ltd. All rights reserved.
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