Research Article | Volume 10, Supplement 2, July, 2022

Bioremediation of hazardous azo dye methyl red by a newly isolated Enterobacter asburiae strain JCM6051 from industrial effluent of Uttarakhand regions

Swati Padma Singh   

Open Access   

Published:  Jun 20, 2022

DOI: 10.7324/JABB.2022.10s206

Azo dyes are often known to be carcinogenic mutagenic and recalcitrant. Dyeing effluents have emerged as a significant cause of water contamination. Dyes influence all living forms, included humans, due to their xenobiotic characteristics and toxicity, as a result, hazardous dyes from colored wastewater must be treated and removed before they are released into the ecosystem. Bioremediation is an innovative, cost-effective, and eco-friendly achievement of biotechnological novelty. Thirty dye-decolorizing indigenous strains were isolated from industrial wastewater in the present investigation from the Kashipur paper industry and SIDCUL industrial area Haridwar using nutrient broth medium amended with 100 mg/l methyl red (MR). Isolation of MR decolorizing bacteria was done by the serial dilution method followed by the spread plate method. A total of 30 isolates were isolated and subjected to primary screening which was done through the tube method. Following a primary screening, 10 potent strains were retained for further evaluation of the efficacy of color removal, designated as MRD2, MRD3, MRD4, MRD15, MRD17, MRD18, MRD19, MRD20, MRD22, and MRD28, which were presumably grouped into 10 genera according to morphology and biochemical assay. The bacterial strain MRD17 outperformed other tested strains via a decolorization assay with 74.28% degradation and decolorization of MR in 72 hours, which was further, identified as Enterobacter asburiae strain JCM6051 by 16S rRNA sequencing and submitted to the NCBI GenBank with accession number MT539179. In addition, the thermodynamic stability of the strain’s 16S rRNA sequence was investigated using bioinformatics tools such as mfold and NEB cutter. These findings suggest that bacterial isolates might be useful in the development of an alternative and environmentally acceptable approach for decolorizing and degrading azo dyes from industrial waste.

Keyword:     Bioremediation decolorization recalcitrant Enterobacter asburiae methyl red


Swati, Singh P. Bioremediation of hazardous azo dye methyl red by a newly isolated Enterobacter asburiae strain JCM6051 from industrial effluent of Uttarakhand regions. J Appl Biol Biotech 2022;10(Suppl 2):64–72.

Copyright: Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.

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