title: Microbial diversity in a continuous system based on rice husks for biodegradation of the azo dyes Reactive Red 2 and Reactive Black 5.
abstract: In the present study the degradation of two common azo dyes used in dye houses today, Reactive Black 5 and Reactive Red 2 was evaluated in biofilters. In two experiments, bioreactors performed over 80% decolorization at a hydraulic retention time of only 28.4h with little production of metabolites. Molecular analyses showed a diverse and dynamic bacterial community composition in the bioreactors, including members of the Bacteroidetes, Acinetobacter (Gammaproteobacteria) and Clostridium (Firmicutes) that possess the capacity to reduce azo dyes. Collectively, the results indicate that the development of mixed bacterial communities from natural biomaterials contributes to an efficient and robust degradation performance in bioreactors even at high concentration of dyes.
authors: School of Engineering, Linnæus University, SE-351 95 Växjö, Sweden. jorgen.forss@lnu.se
authors: Jörgen
authors: J
authors: Forss
authors: Jarone
authors: J
authors: Pinhassi
authors: Markus
authors: M
authors: Lindh
authors: Ulrika
authors: U
authors: Welander
mesh_terms: D001391:Azo Compounds / Q000378:metabolism; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D004396:Coloring Agents / Q000378:metabolism; D059013:Microbial Consortia; D009282:Naphthalenesulfonates / Q000378:metabolism*; D012275:Oryza; D014227:Triazines / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D014227:Triazines; D014874:Water Pollutants, Chemical; C098610:reactive red 2; C063421:Remazol black B