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首页> 美国卫生研究院文献>Brazilian Journal of Microbiology >Decolorization of azo dyes (Direct Blue 151 and Direct Red 31) by moderately alkaliphilic bacterial consortium
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Decolorization of azo dyes (Direct Blue 151 and Direct Red 31) by moderately alkaliphilic bacterial consortium

机译：中度嗜碱细菌财团对偶氮染料（直接蓝151和直接红31）进行脱色

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摘要

Removal of synthetic dyes is one of the main challenges before releasing the wastes discharged by textile industries. Biodegradation of azo dyes by alkaliphilic bacterial consortium is one of the environmental-friendly methods used for the removal of dyes from textile effluents. Hence, this study presents isolation of a bacterial consortium from soil samples of saline environment and its use for the decolorization of azo dyes, Direct Blue 151 (DB 151) and Direct Red 31 (DR 31). The decolorization of azo dyes was studied at various concentrations (100–300 mg/L). The bacterial consortium, when subjected to an application of 200 mg/L of the dyes, decolorized DB 151 and DR 31 by 97.57% and 95.25% respectively, within 5 days. The growth of the bacterial consortium was optimized with pH, temperature, and carbon and nitrogen sources; and decolorization of azo dyes was analyzed. In this study, the decolorization efficiency of mixed dyes was improved with yeast extract and sucrose, which were used as nitrogen and carbon sources, respectively. Such an alkaliphilic bacterial consortium can be used in the removal of azo dyes from contaminated saline environment.
机译：在释放纺织工业排放的废物之前，去除合成染料是主要挑战之一。嗜碱细菌联合体对偶氮染料的生物降解是从纺织品废水中去除染料的环保方法之一。因此，这项研究提出了从盐渍环境的土壤样品中分离出细菌财团，并将其用于偶氮染料直接蓝151（DB 151）和直接红31（DR 31）的脱色。研究了各种浓度（100–300 mg / L）偶氮染料的脱色。当使用200 mg / L的染料时，细菌财团在5天内将DB 151和DR 31分别脱色了97.57％和95.25％。通过pH，温度以及碳和氮源对细菌财团的生长进行了优化。并分析了偶氮染料的脱色。在这项研究中，使用分别用作氮源和碳源的酵母提取物和蔗糖提高了混合染料的脱色效率。这种嗜碱细菌聚生体可用于从受污染的盐水环境中除去偶氮染料。

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