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Recent advances in the biodegradation of azo dyes

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Abstract

As dye demand continues to rapidly increase in the food, pharmaceutical, cosmetic, paper, textile, and leather industries, an industrialization increase is occurring. Meanwhile, the degradation and removal of azo dyes have raised broad concern regarding the hazards posed by these dyes to the ecological environment and human health. Physicochemical treatments have been applied but are hindered by high energy and economic costs, high sludge production, and chemicals handling. Comparatively, the bioremediation technique is an eco-friendly, removal-efficient, and cost-competitive method to resolve the problem. This paper provides scientific and technical information about recent advances in the biodegradation of azo dyes. It expands the biodegradation efficiency, characteristics, and mechanisms of various microorganisms containing bacteria, fungi, microalgae, and microbial consortia, which have been reported to biodegrade azo dyes. In addition, information about physicochemical factors affecting dye biodegradation has been compiled. Furthermore, this paper also sketches the recent development and characteristics of advanced bioreactors.

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Acknowledgements

The authors acknowledge the generous financial support from the Key Project of the Natural Science Foundation of Shandong Province (ZR2020KB021).

Funding

This study was funded by the Key Project of the Natural Science Foundation of Shandong Province (ZR2020KB021).

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Writing—original draft preparation: YS, DZ. Writing—review and editing: ZY, LX, XZ. Funding acquisition: DZ. Supervision: XL.

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Correspondence to Dahai Zhang.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Shi, Y., Yang, Z., Xing, L. et al. Recent advances in the biodegradation of azo dyes. World J Microbiol Biotechnol 37, 137 (2021). https://doi.org/10.1007/s11274-021-03110-6

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  • DOI: https://doi.org/10.1007/s11274-021-03110-6

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