Aerobic decolorization and degradation of azo dyes by suspended growing cells and immobilized cells of a newly isolated yeast Magnusiomyces ingens LH-F1

• Published in: Bioresource technology 2014-04, Vol.158, p.321-328
• Main Authors: Tan, Liang, Li, Hua, Ning, Shuxiang, Xu, Bingwen
• Format: Article
• Language: English
• Subjects: Aerobiosis; Azo Compounds - metabolism; Azo dyes; Biological and medical sciences; Biotechnology; Color; Decoloring; Degradation; Dyes; Fundamental and applied biological sciences. Psychology; Industrial wastes; Microorganisms; Naphthalenesulfonates - metabolism; Saccharomycetales - growth & development; Saccharomycetales - metabolism; Spectrophotometry, Ultraviolet; Strain; Yeast
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2014.02.063

Aerobic decolorization and degradation of azo dyes by both of suspended growing cells and immobilized cells of a newly isolated yeast strain LH-F1 were investigated in this study. A yeast strain LH-F1 capable of aerobically decolorizing various azo dyes (20mg/L) was identified as Magnusiomyces ingens basing on 26S rDNA analysis. Meanwhile, effects of different parameters on decolorization of Acid Red B by both of suspended growing cells and immobilized cells of strain LH-F1 were investigated. Furthermore, possible degradation pathway of the dye was proposed through analyzing metabolic intermediates using UV-Vis and HPLC-MS methods. As far as it is known, it is the first systematic research on a M. ingens strain which is capable of efficiently decolorizing azo dyes under aerobic condition. Additionally, this work would also provide a potentially useful microbial strain LH-F1 for treatment of industrial wastewaters containing azo dyes.