Depolymerization and decolorization of kraft lignin by bacterium Comamonas sp. B-9.
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.
School of Metallurgy and Environment, Central South University, Changsha, 410017, People's Republic of China, liyuan.chai@yahoo.com.
Li-yuan
LY
Chai
Yue-hui
YH
Chen
Chong-jian
CJ
Tang
Zhi-hui
ZH
Yang
Yu
Y
Zheng
Yan
Y
Shi
D020585:Comamonas / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D008031:Lignin / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared
C076151:Kraft lignin; D008031:Lignin