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首页> 外文期刊>African Journal of Biotechnology >Comparison of dye decolorization efficiencies of indigenous fungal isolates
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Comparison of dye decolorization efficiencies of indigenous fungal isolates

机译：本地真菌分离株的染料脱色效率比较

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Different physicochemical cultural conditions were optimized for azo dye removal by using Acid Red 151 as a model dye, being of high consumer demand and usage during the present study. The three fungal strains having the dye removal abilities,Aspergillus niger?SA1,?Aspergillus flavus?SA2 and?Aspergillus terreus?SA3 were selected and processed for different optimization studies in shake flask fermentations.?Aspergillus nidulans?minimal media proved to be most effective for utmost decolorization of AR 151 dye. The effect of inoculum size on dye decolorization efficiency of fungal strains showed that, best level decolorization was observed with 2% inoculum in all three fungal isolates. Effect of different concentration of Acid Red 151 dye ranging from 50 to 200 ppm on the selected fungal strains showed decolorization of AR 151 dye up to their maximal limits (200 ppm) to more than 60%. However, highest percentage of decolorization was shown by?A. flavus?SA2 (92.56%) with lower concentration of dye (50 ppm) and increase in concentration of dye showed a negative effect on decolorization percentage of all the tested fungal strains. There was significant decolorization (>60%) from all fungal strains with different pH ranging from 3 to 10. However, optimum pH for all the three fungal strains was found to be pH 7. There was an influence of temperature on decolorization as maximum decolorization was observed by all the three strains at 30°C (>85%) and it reduced with lower and higher temperatures. Maximum decolorization was observed at 0.5 - 1 M nitrogen concentration by all the three strains, where higher concentration had a negative effect. Similar results were observed for increase in concentration of carbon source as there was increasing trend of decolorization efficiencies of all the fungal strains.
机译：通过使用酸性红151作为模型染料，对不同的理化培养条件进行了优化，以去除偶氮染料，在本研究期间具有很高的消费者需求和用途。选择三种具有染料去除能力的真菌菌株黑曲霉SA1，黄曲霉曲霉SA2和土生曲霉SA3，并在摇瓶发酵中进行不同的优化研究。用于AR 151染料的最大脱色。接种量对真菌菌株的染料脱色效率的影响表明，在所有三种真菌分离物中，接种量为2％时观察到最佳水平的脱色。 50至200 ppm范围内的不同浓度的酸性红151染料对所选真菌菌株的影响表明，AR 151染料的脱色达到其最大极限（200 ppm）至60％以上。但是，ΔA显示出最高的脱色百分比。染料浓度较低（50 ppm）和染料浓度增加的黄曲霉SA2（92.56％）对所有测试的真菌菌株的脱色率均具有负面影响。 pH范围从3到10的所有真菌菌株均出现显着的脱色（> 60％）。但是，发现这三种真菌菌株的最佳pH均为7。温度对脱色的影响最大。这三个菌株在30°C（> 85％）时都观察到了这一点，并且随着温度的升高和降低而降低。在所有三种菌株中，在氮浓度为0.5-1 M时都观察到最大的脱色，其中较高的浓度会产生负面影响。由于所有真菌菌株的脱色效率都有增加的趋势，因此对于碳源浓度的增加也观察到了相似的结果。

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