文献类型：期刊文献

英文题名：Development and application of mixed cultures capable for decolorating and mineralizing azo dyes with an anaerobic-aerobic circle method

作者：Xu, J. L.[1];Zheng, C.[1];Mou, Y. Y.[1];Xu, B.[1];Zhu, Yuling[1,2]

机构：[1]Shaoxing Univ, Sch Life Sci, Sch Civil Engn, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Sch Chem & Chem Engn, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

年份：2018

卷号：132

起止页码：317

外文期刊名：DESALINATION AND WATER TREATMENT

收录：SCI-EXPANDED(收录号：WOS:000450790000034)、、Scopus(收录号：2-s2.0-85057839921)、WOS

基金：This study was supported by Shaoxing science and technology project [2017B70057], Innovation and entrepreneurship training program in Zhejiang [2017R428001] and National undergraduate training program for innovation and Entrepreneurship [201710349006].

语种：英文

外文关键词：Azo dyes; Decoloration; Mineralization; Mixed cultures

外文摘要：An anoxic-aerobic circle method was proposed to develop mixed cultures which could decolorate and mineralize azo dyes efficiently. With accumulation and acclimation processes, mixed cultures which completely degraded azo dyes in the medium containing 5 g/L yeast extract at pH 6-7 under anoxic-aerobic circumstance were obtained. Azoreductase, NADH-DCIP reductase, laccase, tyrodinase and lignin peroxidase were involved in the degradation reaction. The acclimated mixed cultures could decolorate a variety of water soluble dyes and completely mineralize aromatic amines without trichlorobenzo[d]thiazole structure. High-throughput 16S rDNA sequencing analysis revealed that members belonging to Aridibacter, Comamonas, Gemmatimonas and Nannocystis were enriched in anoxic environment which may be responsible for decoloration. The abundance of Brevundimonas, Petrimonas and Chryseobacterium genera increased under aerobic circumstance implying their important roles in mineralization stage. Process performances of the mixed cultures were studied using a 30 L SBR equipped with a stirrer and a covering. SBR was operated under anoxic-aerobic condition via hydraulic retention time shortened strategy and the azo dye removal rates could surpassed 90% with an initial concentration of 60 mg/L in 24 h. It is suggest that the mixed cultures demonstrate great adaptability to various types of azo dyes and can be used in biological treatment of azo dye wastewater.