Metabolic insights into the interaction between nitrogen removal and 4-chlorophenol reduction of anammox consortia.

Xiaojing Wang, Yu Zou, Yameng Wang, Junfeng Niu, Haibo Li

Environmental research 2023 Aug 15

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The response characteristic and performance stabilization of anammox process under the stress of the potential organic pollutants support the application of ammonia-nitrogen wastewater treatment. In the present study, nitrogen removal performance was significantly suppressed with the addition of 4-chlorophenol. The activity of anammox process was inhibited by 14.23% (0.1 mg/L), 20.54% (1 mg/L) and 78.15% (10 mg/L), respectively. Metagenomic analysis revealed a significant decrease in the abundance of KEGG pathways associated with carbohydrate and amino acid metabolism with increasing 4-chlorophenol concentration. Metabolic pathway profiles suggest that putrescine is down-regulated at high 4-chlorophenol stress due to inhibition of nitrogen metabolism processes, while it is up-regulated to reduce oxidative damage. In addition, the presence of 4-chlorophenol induced an enhancement of EPS and bacterial debris decomposition, and a partial conversion of 4-chlorophenol to p-nitrophenol. This study unravels the mechanism of effect on anammox consortia in response to 4-CP, which could provide supplementary to facilitate its full-scale application. Copyright © 2023 Elsevier Inc. All rights reserved.

Citation

Xiaojing Wang, Yu Zou, Yameng Wang, Junfeng Niu, Haibo Li. Metabolic insights into the interaction between nitrogen removal and 4-chlorophenol reduction of anammox consortia. Environmental research. 2023 Aug 15;231(Pt 2):116192