EFFICIENCY OF BACTERIA IN THE BIOREMEDIATION OF AZO DYES IN TEXTILE EFFLUENTS
DOI:
https://doi.org/10.61164/djpy2159Keywords:
Bioremediation, Azo dyes, Textile industry, Bacteria, EffluentsAbstract
This study aimed to map the most investigated bacterial genera in the bioremediation of azo dyes and identify those that present higher decolorization efficiency under controlled conditions. A systematic review with a qualitative approach was conducted in the Scopus database, covering the period from 2013 to 2025 and following PRISMA guidelines for identification, selection, eligibility, and inclusion of studies. A total of 15 articles were analyzed, reporting decolorization rates ranging from 78.20% to 100%. The genera Bacillus, Pseudomonas, and Enterobacter were the most frequently investigated, mainly tested against the dyes Reactive Black 5, Metanil Yellow G, and Congo Red. In addition to color reduction, several studies highlighted decreases in biochemical oxygen demand (BOD), chemical oxygen demand (COD), and Cr(VI) concentration, along with phytotoxicity tests, indicating significant advances for environmental and industrial applications of these techniques. The discussion of results reinforces that bioremediation is a promising alternative for the decolorization of textile effluents, although most research has been carried out under controlled laboratory conditions, evidencing the need to expand tests to real application scenarios. The relevance of this work lies in systematizing scattered data on microorganisms capable of degrading azo dyes, highlighting the efficiency of specific bacterial genera and their potential use in complex industrial processes, especially in the textile sector, where wastewater treatment remains a significant environmental and economic challenge.
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Copyright (c) 2025 Analice Andretti Gomes, Raquel Fidelis da Silva, Diego da Silva Sales, Camila Mendonça Romero Sales
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