Biotreatment of o-nitrobenzaldehyde manufacturing wastewater and changes in activated sludge flocs in a sequencing batch reactor

Chang Liu, Shinawar Waseem Ali, Li Bo Guan, Fang Bo Yu*, Shun Peng Li, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

o-Nitrobenzaldehyde manufacturing wastewater is characterized for being highly saline, with its TN content and dissolved organic concentrations giving rise to high COD loads. A sequencing batch reactor was established to investigate the effects of major processing variables, such as SRT and HRT, on system performance. The optimal COD (86%) and TN (40.9%) removal efficiencies were obtained at 16. d (SRT) and 12. h (HRT). Design equations were developed by applying experimental data. Changes in sludge flocs were studied using a combination of methods including: chemical analysis; fluorescence in situ hybridization (FISH); and denaturing gradient gel electrophoresis profile analysis of 16S rRNA genes. Dramatic changes occurred during adaptation and β- Proteobacteria was found to be the most prevalent population. Besides, some species affiliated with α-subclasses of Proteobacteria and Cytophaga-Flavobacterium-Bacteroides (CFB) group were also enriched. This study may help with future research in providing a better understanding of the activated sludge biotreatment.

Original languageEnglish
Pages (from-to)228-234
Number of pages7
JournalBioresource Technology
Volume104
DOIs
Publication statusPublished - Jan 2012

Scopus Subject Areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

User-Defined Keywords

  • Activated sludge
  • DGGE
  • FISH
  • Microbial community
  • O-Nitrobenzaldehyde

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