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首页> 外文期刊>British Biotechnology Journal >Decolorization of Different Azo Dyes and Detoxification of Dyeing Wastewater by Pseudomonas stutzeri (SB_13) Isolated from Textile Dyes Effluent
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Decolorization of Different Azo Dyes and Detoxification of Dyeing Wastewater by Pseudomonas stutzeri (SB_13) Isolated from Textile Dyes Effluent

机译：纺织染料废水中分离的斯多氏假单胞菌（SB_13）对各种偶氮染料的脱色和印染废水的脱毒

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Aims: The present study aimed to estimate the decolorization of three individual azo dyes or in mixture, as well the decolorization of dyeing wastewater was evaluated using bacterial strain of Pseudomonas stutzeri (SB_13) or bacterial consortium isolated from textile dyes effluent. The cytotoxicity effect of dyeing wastewater and its biodegraded metabolites, as well the detoxification efficacy were evaluated. Study Design: Soil and water samples were collected from the textile dyeing industrial area for bacterial isolation. Effect of different parameters on the dye decolorization by bacterial strains was optimized. Place and Duration of Study: The study was performed in Botany & Microbiology Department, Faculty of Science, Al-azhar University, from July 2014 until January 2016. Methodology: Pseudomonas stutzeri strain (SB_13) was isolated from textile dyes effluent and its ability for decolorization of different azo dyes and detoxification of dyeing wastewater samples was investigated. Comparison the decolorization effectiveness of bacterial strain (SB_13) which was used individually and in a bacterial consortium which contains two previously studied Klebsiella strains of ( Klebsiella pneumoniae (Kp) and Klebsiella variicola (Kv)) was also observed. Decolorization of Disperse Blue (R16), Disperse Yellow (D4), and Reactive Red Synozol (R4) dyes which were used singly and in mixture was estimated under different concentrations and incubation conditions. Results: The highest decolorization rates of single or mixtures of azo dyes were observed with 2% glucose or sucrose, 2% ammonium sulfate, and 3% (v/v) bacterial inoculum size, at pH of 5-7, temperature of 35oC, and after 72-96 hrs. Mixed cultures of (SB_13 &Kp), (SB_13 &Kv), and (SB_13& Kp& Kv) significantly decolorized 59.5% of Disperse Blue (R16), 52% of Disperse Yellow (D4), and (18.3%) of Reactive Red Synozol (R4) dyes, respectively more than those found by individual strain (SB_13). Individual strain of (SB_13) showed the highest decolorization 61% capacity of azo dyes mixture compared to those observed by bacterial consortiums. The treatment of dyeing wastewater with SB_13 strain significantly reduced the phytotoxicity of wastewater (from 100% of abnormal mitosis to 23.6%) as compared with other treatments.
机译：目的：本研究旨在评估三种单独的偶氮染料或混合物中的脱色，以及使用斯氏假单胞菌的细菌菌株（SB_13）或从纺织染料废水中分离出的细菌财团对染色废水的脱色进行了评估。评价了印染废水及其生物降解代谢产物的细胞毒性作用，以及其解毒功效。研究设计：从纺织印染工业区收集土壤和水样进行细菌分离。优化了不同参数对细菌菌株对染料脱色的影响。研究的地点和持续时间：该研究于2014年7月至2016年1月在Al-azhar大学理学院植物学与微生物学系进行。方法：从纺织品染料废水中分离出Stutzeri假单胞菌菌株（SB_13），其分离能力研究了各种偶氮染料的脱色和染色废水样品的脱毒。比较了单独使用的细菌菌株（SB_13）和包含两个先前研究过的克雷伯氏菌（肺炎克雷伯菌（Kp）和水痘克雷伯菌（Kv））的细菌联合体的脱色效果。在不同的浓度和孵育条件下，估计单独使用和混合使用的分散蓝（R16），分散黄（D4）和活性红Synozol（R4）染料的脱色。结果：在pH为5-7，温度为35oC，温度为5-7的条件下，使用2％的葡萄糖或蔗糖，2％的硫酸铵和3％（v / v）的细菌接种物，偶氮染料的单一或混合物的最高脱色率最高。在72-96小时后。 （SB_13＆Kp），（SB_13＆Kv）和（SB_13＆Kp＆Kv）的混合培养物使59.5％的分散蓝（R16），52％的分散黄（D4）和（18.3％）的反应性红色Synozol（R4）脱色）染料，分别比个别菌株（SB_13）发现的染料多。 （SB_13）的单个菌株显示出最高的脱色能力，偶氮染料混合物的脱色能力比细菌联合体观察到的高。与其他处理相比，SB_13菌株对印染废水的处理显着降低了废水的植物毒性（从异常有丝分裂的100％降至23.6％）。

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