嗜盐菌
化学
盐度
碱度
废水
木质素过氧化物酶
环境化学
核化学
色谱法
漆酶
食品科学
生物化学
细菌
酶
有机化学
环境工程
生物
环境科学
遗传学
生态学
作者
Guang Guo,Jiuxiao Hao,Fang Tian,Chong Liu,Keqiang Ding,Can Zhang,Feng Yang,Jin Xu
标识
DOI:10.1016/j.biortech.2020.123923
摘要
Increased temperature, salinity and alkalinity restrict the biodecolorization rate of textile wastewater. In the present study, the halophilic alkalithermophilic bacterial consortium ZSY, which can decolorize azo dyes under 10% salinity, pH 10 and 50 °C, was enriched. It can decolorize Metanil Yellow G (MYG) under a wide range of pH values (8-10), temperatures (40-50 °C), dye concentrations (100-400 mg/L) and salinity levels (1%-10%). Laccase (Lac), lignin peroxidase (Lip), nicotinamide adenine dinucleotide-dichlorophenol indophenol reductase (NADH-DCIP) and azoreductase are involved in the decolorization process. A decolorization pathway of MYG was proposed via gas chromatography-mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FTIR). The toxicity of MYG decreased after decolorization by ZSY consortium. A metagenomic sequencing approach was subsequently applied to identify the functional genes involved in decolorization. Overall, this halophilic alkalithermophilic bacterial consortium could be a promising candidate for the treatment of textile wastewater in environments with increased temperature, salinity and alkalinity.
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