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 TopicWater and Wastewater Treatment and Management in the Textile IndustryView all 5 articles
A novel approach for biodegradation and mineralization of malachite green using a hybrid aerobic/anoxic bioreactor
Provisionally accepted
- Urmia University of Medical Sciences, Urmia, Iran
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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
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