title: Kraft lignin biodegradation by Novosphingobium sp. B-7 and analysis of the degradation process.
abstract: This study focused on the biodegradation of kraft lignin (KL) by Novosphingobium sp. B-7 using KL as sole carbon source. Results revealed that Novosphingobium sp. B-7 reduced the chemical oxygen demand (COD) by 34.7% in KL mineral salt medium after 7days of incubation. Additionally, the maximum activities of manganese peroxidase (MnP) of 3229.8Ul(-1) and laccase (Lac) of 1275Ul(-1) were observed at 4th and 5th day, respectively. GC-MS analysis indicated that after incubated with Novosphingobium sp. B-7, low molecular weight alcohols and lignin-related monomer compounds such as ethanediol, p-hydroxy benzoic acid and vanillic acid were formed in the system, which strongly confirmed the degradation of KL by Novosphingobium sp. B-7.
authors.affiliation: School of Metallurgical Science and Engineering, Central South University, Changsha 410017, China.
authors.forename: Yuehui
authors.initials: Y
authors.lastname: Chen
authors.forename: Liyuan
authors.initials: L
authors.lastname: Chai
authors.forename: Chongjian
authors.initials: C
authors.lastname: Tang
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Yang
authors.forename: Yu
authors.initials: Y
authors.lastname: Zheng
authors.forename: Yan
authors.initials: Y
authors.lastname: Shi
authors.forename: Huan
authors.initials: H
authors.lastname: Zhang
mesh_terms: D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D042845:Laccase / Q000378:metabolism; D008031:Lignin / Q000378:metabolism*; D010544:Peroxidases / Q000378:metabolism; D042301:Sphingomonadaceae / Q000254:growth & development / Q000378:metabolism*
chemical_list: C076151:Kraft lignin; D008031:Lignin; D042845:Laccase; D010544:Peroxidases; C051129:manganese peroxidase