High-rate anaerobic decolorization of methyl orange from synthetic azo dye wastewater in a methane-based hollow fiber membrane bioreactor

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Xiu-Ning Wang
  • Fang Zhang
  • Jun Wu
  • Wei Zhang
  • Yong-Ze Lu
  • Liang Fu
  • Raymond J. Zeng

Detail(s)

Original languageEnglish
Article number121753
Journal / PublicationJournal of Hazardous Materials
Volume388
Online published25 Nov 2019
Publication statusPublished - 15 Apr 2020

Abstract

Anaerobic biological techniques are widely used in the reductive decolorization of textile wastewater. However, the decolorization efficiency of textile wastewater by conventional anaerobic biological techniques is generally limited due to the low biomass retention capacity and short hydraulic retention time (HRT). In this study, a methane-based hollow fiber membrane bioreactor (HfMBR) was initially inoculated with an enriched anaerobic methane oxidation (AOM) culture to rapidly form an anaerobic biofilm. Then, synthetic azo dye wastewater containing methyl orange (MO) was fed into the HfMBR. MO decolorization efficiency of ∼ 100 % (HRT = 2 to 1.5 days) and maximum decolorization rate of 883 mg/L/day (HRT = 0.5 day) were obtained by the stepwise increase of the MO loading rate into the methane-based HfMBR. Scanning electron microscopy (SEM) and fluorescence in situ hybridization (FISH) analysis visually revealed that archaea clusters formed synergistic consortia with adjacent bacteria. Quantitative PCR (qPCR), phylogenetic and high-throughput sequencing analysis results further confirmed the biological consortia formation of methane-related archaea and partner bacteria, which played a synergistic role in MO decolorization. The high removal efficiency and stable microbial structure in HfMBR suggest it is a potentially effective technique for high-toxic azo dyes removal from textile wastewater.

Research Area(s)

  • Anaerobic methane oxidation, Archaea and bacteria, Decolorization, Hollow fiber membrane bioreactor, Methyl orange

Citation Format(s)

High-rate anaerobic decolorization of methyl orange from synthetic azo dye wastewater in a methane-based hollow fiber membrane bioreactor. / Bai, Ya-Nan; Wang, Xiu-Ning; Zhang, Fang; Wu, Jun; Zhang, Wei; Lu, Yong-Ze; Fu, Liang; Lau, Tai-Chu; Zeng, Raymond J.

In: Journal of Hazardous Materials, Vol. 388, 121753, 15.04.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal