Abstract
There is no commercial or industrial-scale process for the remediation of black liquor using microorganisms to date. One of the most important causes is that most microorganisms are not able to use lignin as their principal metabolic carbon or energy source. The bacterial strain Comamonas sp. B-9 has shown remarkable ability to degrade kraft lignin and decolorize black liquor using lignin as its principal metabolic carbon and energy source. This report looks at the depolymerization and decolorization of kraft lignin by Comamonas sp. B-9. The degradation, decolorization, and total carbon removal reached 45, 54, and 47.3 %, respectively, after 7 days treatment. Comamonas sp. B-9 was capable of depolymerizing kraft lignin effectively as analyzed by gel permeation chromatography and decolorization via degrading benzene ring structures as shown using Fourier transform infrared spectroscopy analysis.
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This work was supported by National Funds for Distinguished Young Scientists of China (50925417), National High Technology Research and Development Program of China (2011AA061001), and National Research Funding for the Public Benefit of Environmental Protection (2011467062).
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Chai, Ly., Chen, Yh., Tang, Cj. et al. Depolymerization and decolorization of kraft lignin by bacterium Comamonas sp. B-9. Appl Microbiol Biotechnol 98, 1907–1912 (2014). https://doi.org/10.1007/s00253-013-5166-5
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DOI: https://doi.org/10.1007/s00253-013-5166-5