Author/Authors :
Chen، نويسنده , , Yuehui and Chai، نويسنده , , Liyuan and Tang، نويسنده , , Chongjian and Yang، نويسنده , , Zhihui and Zheng، نويسنده , , Yu and Shi، نويسنده , , Yan and Zhang، نويسنده , , Huan، نويسنده ,
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 7 days of incubation. Additionally, the maximum activities of manganese peroxidase (MnP) of 3229.8 U l−1 and laccase (Lac) of 1275 U l−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.
Keywords :
Biodegradation , GC–MS , Kraft lignin , Novosphingobium sp. B-7
