Reduction characteristic of chlorobenzene by a newly isolated Paenarthrobacter ureafaciens LY from a pharmaceutical wastewater treatment plant

Author:

Liu Nan12ORCID,Yao Yan‐yan12,Zhang Jin12,Zhang Ji‐guo12,Wu Chao3,Ouyang Du‐juan4,Zou Chang‐yong12,Yang Zhen‐qiang5,Li Ji‐xiang67

Affiliation:

1. Key Laboratory of Pollution Treatment and Resource China National Light Industry, Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration Zhengzhou Henan China

2. Department of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China

3. Zhejiang Ecology and Environment Group Co., Ltd. Hangzhou China

4. College of Chemical Engineering Zhengzhou University Zhengzhou China

5. Institute of Chemistry Co. Ltd Henan Academy of Sciences Zhengzhou China

6. Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai China

7. University of Chinese Academy of Sciences Beijing China

Abstract

AbstractA highly efficient chlorobenzene‐degrading strain was isolated from the sludge of a sewage treatment plant associated with a pharmaceutical company. The strain exhibited a similarity of over 99.9% with multiple strains of Paenarthrobacter ureafaciens. Therefore, the strain was suggested to be P. ureafaciens LY. This novel strain exhibited a broad spectrum of pollutant degradation capabilities, effectively degrading chlorobenzene and other organic pollutants, such as 1, 2, 4‐trichlorobenzene, phenol, and xylene. Moreover, P. ureafaciens LY co‐metabolized mixtures of chlorobenzene with 1, 2, 4‐trichlorobenzene or phenol. Evaluation of its degradation efficiency showed that it achieved an impressive degradation rate of 94.78% for chlorobenzene within 8 h. The Haldane–Andrews model was used to describe the growth of P. ureafaciens LY under specific pollutants and its concentrations, revealing a maximum specific growth rate (μmax) of 0.33 h−1. The isolation and characterization of P. ureafaciens LY, along with its ability to degrade chlorobenzene, provides valuable insights for the development of efficient and eco‐friendly approaches to mitigate chlorobenzene contamination. Additionally, investigation of the degradation performance of the strain in the presence of other pollutants offers important information for understanding the complexities of co‐metabolism in mixed‐pollutant environments.

Publisher

Wiley

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