title: Decolorization and biodegradation of the Congo red by Acinetobacter baumannii YNWH 226 and its polymer production's flocculation and dewatering potential.
abstract: The strain Acinetobacter baumannii YNWH 226 was utilized to degrade Congo red (CR) under aerobic conditions. CR was employed as the sole carbon source to produce extracellular polymeric substances (EPS) used as potent bioflocculants in this strain. A total of 98.62% CR was removed during the 48-h decoloration experiments using CR (100 mg/L). A total of 83% bioadsorption and 65% biodegradation were responsible for the decoloration and degradation of CR through the strain. The bioflocculant showed high flocculation activity and dewaterability on textile dyeing sludge. A maximum flocculation of 78.62% with a minimum SBF of 3.07×10(9) s(2)/g and a CST of 58.4 s were achieved. We investigated the internal relationship between the decolorization efficiency of YNWH 226 and the flocculation activity and dewatering capacity of its EPS. The components and structure of the EPS highly influenced the decolorization efficiency of CR and the flocculation activity and dewatering capacity on sludge.
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Ruijing
authors.initials: R
authors.lastname: Li
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: ningxunan666@126.com.
authors.forename: Xun-an
authors.initials: XA
authors.lastname: Ning
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Jieying
authors.initials: J
authors.lastname: Liang
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Meiqing
authors.initials: M
authors.lastname: Lin
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D040981:Acinetobacter baumannii / Q000378:metabolism*; D000327:Adsorption; D000332:Aerobiosis; D001673:Biodegradation, Environmental; D001704:Biopolymers / Q000378:metabolism*; D003116:Color; D003224:Congo Red / Q000302:isolation & purification*; D005374:Filtration; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D015203:Reproducibility of Results; D013997:Time Factors; D014867:Water / Q000737:chemistry*
chemical_list: D001704:Biopolymers; D014867:Water; D003224:Congo Red
keywords: Acinetobacter baumannii; Aerobic conditions; Bioflocculant; Decolorization; Extracellular polymeric substances