title: Mineralization and kinetics of Reactive Brilliant Red X-3B by a combined anaerobic-aerobic bioprocess inoculated with the coculture of fungus and bacterium.
abstract: Mineralization of Reactive Brilliant Red X-3B by a combined anaerobic-aerobic process which was inoculated with the co-culture of Penicillium sp. QQ and Exiguobacterium sp. TL was studied. The optimal conditions of decolorization were investigated by response surface methodology as follows: 132.67 g/L of strain QQ wet spores, 1.09 g/L of strain TL wet cells, 2.25 g/L of glucose, 2.10 g/L of yeast extract, the initial dye concentration of 235.14 mg/L, pH 6.5, and 33 °C. The maximal decolorization rate was about 96 % within 12 h under the above conditions. According to the Haldane kinetic equation, the maximal specific decolorization rate was 89.629 mg/g˙h. It was suggested that in the anaerobic-aerobic combined process, decolorization occurred in the anaerobic unit and chemical oxygen demand (COD) was mainly removed in the aerobic one. Inoculation of fungus QQ in the anaerobic unit was important for mineralization of X-3B. Besides, the divided anaerobic-aerobic process showed better performance of COD removal than the integrated one. It was suggested that the combined anaerobic-aerobic process which was inoculated with co-culture was potentially useful for the field application.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
authors.forename: Shengnan
authors.initials: S
authors.lastname: Shi
authors.forename: Fang
authors.initials: F
authors.lastname: Ma
authors.forename: Tieheng
authors.initials: T
authors.lastname: Sun
authors.forename: Ang
authors.initials: A
authors.lastname: Li
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Qu
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D000704:Analysis of Variance; D001391:Azo Compounds / Q000737:chemistry / Q000378:metabolism*; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D018920:Coculture Techniques / Q000379:methods*; D003116:Color; D007700:Kinetics; D008903:Minerals / Q000378:metabolism*; D009282:Naphthalenesulfonates / Q000737:chemistry / Q000378:metabolism*; D010407:Penicillium / Q000378:metabolism*
chemical_list: D001391:Azo Compounds; D008903:Minerals; D009282:Naphthalenesulfonates; C520101:Reactive brilliant red X-3B