文献类型：期刊文献

英文题名：Characterization of functional microbial communities involved in diazo dyes decolorization and mineralization stages

作者：Zhu, Yuling[1];Xu, Jiali[1];Cao, Xiwei[1];Cheng, Yutong[2];Zhu, Tingting[3]

机构：[1]Shaoxing Univ, Sch Civil Engn, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China;[3]Shenzhen Key Lab Emerging Contaminates Detect & C, Key Lab Drinking Water Source Management & Techno, Shenzhen Key Lab Drinking Water Source Safety Con, State Environm Protect, Shenzhen 51800, Guangdong, Peoples R China

年份：2018

卷号：132

起止页码：166

外文期刊名：INTERNATIONAL BIODETERIORATION & BIODEGRADATION

收录：SCI-EXPANDED(收录号：WOS:000447358900019)、、EI(收录号：20181304944309)、Scopus(收录号：2-s2.0-85044311178)、WOS

基金：This study was supported by Shaoxing science and technology project [2017B70057], National Natural Science Foundation of China [grant number 21206093], 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：Diazo dyes; Functional microbial community; Decolorization; Mineralization; High-throughput sequencing

外文摘要：A new sequencing anaerobic-oxic-sedimentation (AOS) bioreactor was constructed to characterize the functional microbial communities involved in different diazo dye transformation stages. Two typical refractory diazo dyes, Congo red (CR) and Amino Black (AB), were treated in the two AOS bioreactors as model contaminants. Chemical oxygen demand (COD), dissolved oxygen (DO), pH and diazo dye intermediates in each compartment in the two bioreactors were distinct, leading to the difference in the corresponded microbial communities. High throughput sequencing was applied to study the microbial community structure. Bacteroides, Parabacteroides, Chryseobacterium and Comamonas were dominant genera. Linear discriminant analysis (LDA) effect size (LEfSe) was employed to characterize significantly different genera involved in, anaerobic and oxic zones. Multiple linear regression was employed to further evaluate the relationship between azo dye intermediates and bacterial community compositions, and the results were demonstrated in t-value biplots. Functional genera corresponding to azo bond reduction and aromatic amines mineralization were characterized and the mechanism of biotransformation of two diazo dyes to CO2 was proposed. These findings were beneficial for process optimization and efficiency improvement.