title: Influence of dye type and salinity on aerobic decolorization of azo dyes by microbial consortium and the community dynamics.
abstract: In this research, aerobic decolorization of different azo dyes by a microbial community was studied. The results showed that more than 80% of four azo dyes (100 mg/L) could be aerobically decolorized by the microbial consortium, however, the time needed was obviously different. Kinetic data indicated that the processes were well described by zero-order kinetics, and the chemical structures of dyes had obvious influence on decolorization rates. On the other hand, effects of salinity on decolorization were also investigated. There was still 40% dye removal for Acid Brilliant Red GR when the salinity increased to 250 g/L. And the microbial community structures with different salinity were detected by PCR-DGGE. It was shown that the same two bacteria were dominant in all decolorization systems, and some typical halophilic microorganisms were found under higher-salt conditions.
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, Liaoning, China. tanl_lnnu@yahoo.com.cn
authors.forename: Liang
authors.initials: L
authors.lastname: Tan
authors.forename: Shuxiang
authors.initials: S
authors.lastname: Ning
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Cao
mesh_terms: D000332:Aerobiosis; D001391:Azo Compounds / Q000378:metabolism*; D004396:Coloring Agents / Q000378:metabolism*; D058645:Denaturing Gradient Gel Electrophoresis; D007700:Kinetics; D059013:Microbial Consortia; D016133:Polymerase Chain Reaction; D054712:Salinity; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D014874:Water Pollutants, Chemical