中度嗜盐菌群对酸性大红GR的脱色性能研究

发布时间：2018-05-01 21:02

本文选题：酸性大红GR + 脱色　；参考：《微生物学通报》2017年11期

【摘要】：【目的】获得能够在高盐环境下脱色偶氮染料的高效脱色菌群,应用于印染废水的生物处理。【方法】采用在5%盐度培养基富集的方法,从印染废水的活性污泥中富集能够在5%盐度下脱色酸性大红GR的嗜盐混合菌群,利用高通量测序方法研究其群落结构,利用静置培养的方法研究其脱色性能。【结果】该菌群可以在5%盐度、静置培养下15 h内将100 mg/L的酸性大红GR几乎完全脱色,主要由Halomonas、Salinicoccus、Nitratireductor和Aequorivita等4个属组成,Halomonas是主要的脱色菌。高浓度的Na NO_3、Na_2SO_4和Na Cl抑制菌群的脱色,其中Na NO_3抑制作用最强。该菌群的最佳脱色条件是在p H 7.0、盐度5%、30°C脱色效果最好,可脱色直接耐黑G和分散深蓝S-3BG等偶氮染料,并且具有连续脱色的能力。【结论】嗜盐菌群在处理偶氮染料废水中具有良好的应用价值。
[Abstract]:[objective] to obtain the high efficiency decolorizing bacteria which can decolorize azo dyes in high salt environment, and to apply them to the biological treatment of printing and dyeing wastewater. [methods] the method of enrichment in 5% salinity medium was used. The halophilic mixed bacteria which can decolorize acid reddish gr at 5% salinity were enriched from activated sludge of printing and dyeing wastewater. The community structure was studied by high-throughput sequencing method. [results] the decolorization of 100 mg/L acid reddish gr was almost completely decolorized in the presence of 5% salinity. Halomonas was the main decolorizing bacteria composed of Halomonas Salinicocus Nitratireductor and Aequorivita. High concentration of Na _ no _ 3 and Na _ 2SO _ 4 inhibited the decolorization of bacteria, among which Na NO_3 had the strongest inhibitory effect. The optimum decolorization conditions of the flora were as follows: pH 7.0, salinity 5 ~ 30 掳C, and the decolorization of azo dyes, such as black G and disperse dark blue S-3BG, were the best. [conclusion] halophilic bacteria have good application value in the treatment of azo dye wastewater.
【作者单位】：南京工程学院环境工程学院;中国农业科学院农业环境与可持续发展研究所;
【基金】：国家自然科学基金项目(No.31600091,51608257,31402117) 南京工程学院人才引进项目(No.YKJ201528) 南京工程学院大学生科技创新项目(No.TB201712001)~~
【分类号】：X791

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