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ORIGINAL RESEARCH article

Front. Environ. Sci.
Sec. Water and Wastewater Management
Volume 12 - 2024 | doi: 10.3389/fenvs.2024.1420418
This article is part of the Research Topic Water and Wastewater Treatment and Management in the Textile Industry View all 5 articles

A novel approach for biodegradation and mineralization of malachite green using a hybrid aerobic/anoxic bioreactor

Provisionally accepted
Ali Ahmad Aghapour Ali Ahmad Aghapour *Hajar Mousavi Hajar Mousavi Hassan Khorssandi Hassan Khorssandi
  • Urmia University of Medical Sciences, Urmia, Iran

The final, formatted version of the article will be published soon.

    Malachite green (MG) is a toxic dye extensively employed in diverse industries, and its toxicity increases because of its conversion to Leukomalachite. The hybrid bioreactor demonstrated remarkable efficiency in both biodegradation (99%) and COD removal (98%) under optimal operating conditions (MG: 300 mg/L and HRT: 3d). The maximum biodegradable concentration of MG was significantly increased from 60 mg/L to 300 mg/L by combining the aerobic suspended growth process with an anoxic biofilter.Most of the intermediate compounds found in MG exhibited a linear chemical structure, including 2,3-butanediol, diacetate, and 5-eicosene. Additionally, cyclic compounds such as 1,2benzenedicarboxylic acid and 2-propenoic acid were also detected. But, Leukomalachite was not detected as an intermediate compound because an anoxic process was chosen for the biofilter.Notably, this study also identified various bacteria, including Staphylococcus succinus, Kocuria rosea, Achromobacter pulmonis, Bacillus australimaris, Staphylococcus haemolyticus, and Bacillus licheniformis, as microorganisms capable of biodegrading MG for the first time.Considering the superior capability of the hybrid bioreactor in treating industrial wastewater with high concentrations of MG, without the conversion to Leukomalachite, compared to previous 2 processes studied, it can be considered a feasible alternative for treating wastewater that contains dyes or hazardous compounds.

    Keywords: Biofilter, Anoxic process, Hybrid processes, industrial watewater, Dye, Hazardous Waste

    Received: 20 Apr 2024; Accepted: 04 Nov 2024.

    Copyright: © 2024 Aghapour, Mousavi and Khorssandi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Ali Ahmad Aghapour, Urmia University of Medical Sciences, Urmia, Iran

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.