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Journal of Environmental Science and Health, Part A
Toxic/Hazardous Substances and Environmental Engineering
Volume 56, 2021 - Issue 4
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Research Article

Variation and comparison of biotoxicity during typical biological treatment of dyeing wastewater

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Pages 492-499 | Received 19 Feb 2020, Accepted 08 Feb 2021, Published online: 07 Mar 2021
 

Abstract

In present study, dyeing wastewater samples were collected from three typical dyeing wastewater treatment plants in Wujiang, Shengze and Shanghai, China. Physicochemical properties and biotoxicity indicators (luminescent bacteria acute toxicity and umu genotoxicity) were tested and the relationships among them were analyzed. The results revealed that two biotoxicity indicators varied significantly among different treatment units of three plants. After treatment by plant A, luminescent bacteria acute toxicity of dyeing wastewater reduced effectively, while umu genotoxicity increased significantly. Two biotoxicity indicators exhibited decrease and increase trends during the treatment processes of plant B and plant C, respectively. Correlation analysis indicated that there was little correlation among biotoxicity indicators and physicochemical properties, meanwhile two kinds of biotoxicity indicators were relatively independent. Therefore, it was recommended that comprehensive evaluation of dyeing wastewater toxicity needs the combination of various biotoxicity indicators, and the relationship among biotoxicity indicators and physicochemical properties of dyeing wastewater should be established individually. The results of this study would offer a general understanding and evaluation of biotoxicity during actual dyeing wastewater treatment processes and provide database for toxicity reduction and management of dyeing wastewater.

Acknowledgments

We thank Prof. Hu H.Y. and Prof. Liu J.S. for technical help.

Additional information

Funding

This work was supported by the National Key Research and Development Program of China (2019YFC0408304), the Fundamental Research Funds for the Central Universities (2232019D3-22), Anhui Provincial Natural Science Foundation (1808085QE176), University Natural Science Research Project of Anhui Province (KJ2018A0444, KJ2019A0670), and the Suzhou University Startup Foundation for Doctor (2016jb04, 2017jb04).

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