Cometabolic biodegradation system employed subculturing photosynthetic bacteria: A new degradation pathway of 4-chlorophenol in hypersaline wastewater

Liang Wang, Zhongce Hu, Mian Hu, Jun Zhao, Peijie Zhou, Yongjie Zhang, Xin Zheng, Yifeng Zhang, Zhong Ting Hu, Zhiyan Pan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

4-chlorophenol (4-CP) as a toxic persistent pollutant is quite difficult treatment by using traditional biological processes. Herein, photosynthetic bacteria (PSB) driven cometabolic biodegradation system associated with exogeneous carbon sources (e.g., sodium acetate) has been demonstrated as an effective microbial technique. The biodegradation rate (ri) can be at 0.041 d−1 with degradation efficiency of 93% in 3094 lx. Through the study of subculturing PSB in absence of NaCl, it was found that 50% inoculation time can be saved but keeping a similar 4-CP biodegradation efficiency in scale-up salinity system. A new plausible biodegradation pathway for 4-CP in 4th G PSB cometabolic system is proposed based on the detected cyclohexanone generation followed by ring opening. It is probably ascribed to the increasement of Firmicutes and Bacteroidetes at phyla level classified based on microbial community. This study contributes to a new insight into cometabolic technology for chlorophenol treatment in industrial hypersaline wastewater.

Original languageEnglish
Article number127670
Number of pages9
JournalBioresource Technology
Volume361
DOIs
Publication statusPublished - Oct 2022

Scopus Subject Areas

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

User-Defined Keywords

  • 4-Chlorophenol
  • Cometabolic biodegradation
  • Hypersaline wastewater
  • Photosynthetic bacteria

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