Lee, Young H. Bottomley, Lawrence A. Pavlostathis, Spyros G. 2024-01-20T16:30:59Z 2024-01-20T16:30:59Z 2021-09-05 2011-09 1944-3994 https://pubs.kist.re.kr/handle/201004/130016 The effect of anthraquinone disulfonate (AQDS) on the decolorization of the azo dye Reactive Red 198 (RR198) and the anthraquinone dye Reactive Blue 4 (RB4), as well as the effect of RB4 on the decolorization of RR198, both AQDS and RB4 serving as redox mediators, was assessed. An anaerobic, continuous-flow, fluidized-bed bioreactor with an immobilized halotolerant mixed culture was used in this study. All tests were performed at a reactor temperature of 35 degrees C, a hydraulic retention time of 6.1 h, pH 7.2 +/- 0.1, with glucose used as the carbon and electron source. AQDS at relatively low influent concentrations (10-150 mu M) enhanced the extent of RR198 reduction, but had a negligible effect on the biodecolorization of RB4. At an equal concentration of 50 mu M, RB4 and AQDS had a similar enhancing effect on the biodecolorization of the azo dye RR198. Therefore, anthraquinone dyes can serve as redox mediators in mixed, spent textile dyebaths potentially leading to enhanced reductive biodecolorization rate and extent of other types of dyes (i.e., azo dyes). English TAYLOR & FRANCIS INC OXIDATION-REDUCTION CONDITIONS AZO DYES METHANOGENIC CONDITIONS BIOLOGICAL DECOLORIZATION THERMOPHILIC 55-DEGREES-C MESOPHILIC 30-DEGREES-C TEXTILE WASTEWATERS BIODECOLORIZATION TRANSFORMATION TOXICITY Anthraquinone compounds as redox mediators for enhanced continuous-flow anaerobic biotransformation of reactive dyes under hypersaline conditions Article 10.5004/dwt.2011.2619 1 DESALINATION AND WATER TREATMENT, v.33, no.1-3, pp.68 - 76 DESALINATION AND WATER TREATMENT 33 1-3 68 76 scie scopus 000297925500009 2-s2.0-80054926862 Engineering, Chemical Water Resources Engineering Water Resources Article; Proceedings Paper OXIDATION-REDUCTION CONDITIONS AZO DYES METHANOGENIC CONDITIONS BIOLOGICAL DECOLORIZATION THERMOPHILIC 55-DEGREES-C MESOPHILIC 30-DEGREES-C TEXTILE WASTEWATERS BIODECOLORIZATION TRANSFORMATION TOXICITY Textile dyes Decolorization Redox mediators Fluidized-bed bioreactor Salt