文献类型：期刊文献

英文题名：Metagenomics revealed the phase-related characteristics during rapid development of halotolerant aerobic granular sludge

作者：Li, Wei[1,2,3];Yao, Jin-chi[1,2];Zhuang, Jin-long[1,2];Zhou, Yuan-yuan[1,2];Shapleigh, James P.[4];Liu, Yong-di[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Natl Engn Lab Ind Wastewater Treatment, Shanghai, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China;[4]Cornell Univ, Dept Microbiol, Ithaca, NY USA

年份：2020

卷号：137

外文期刊名：ENVIRONMENT INTERNATIONAL

收录：;EI(收录号：20200708182566);WOS:【SCI-EXPANDED(收录号:WOS:000517970800054)】；

基金：This work was supported by National Natural Science Foundation of China (51578240, 51808223), and Fundamental Research Funds for the Central Universities (222201814053, WB1917009).

语种：英文

外文关键词：Salt-tolerant AGS; Rapid granulation; Metagenomics; Fungi

摘要：Efforts to produce aerobic granular sludge (AGS) for high-efficient and stable nutrient removal in high saline wastewaters have gained much attention recently. This study was undertaken to describe the phase-related characteristics of the rapid formation of glucose-fed salt-tolerant AGS (SAGS) generated from common municipal activated sludge using metagenomic approaches. The time needed for SAGS formation is about 11 days in a multi-ion matrix salinity of 3%. There were three distinct developmental phases during sludge maturation which were designated: I) the salinity adaptation phase (days 1-2), II) the particle-size transition phase (days 3-5) and III) the maturation and steady-state phase (days 6-11), respectively. Genome-based analysis revealed that during the phase I, members of the genus Mangrovibacter, which has the potential to secrete extracellular polymeric substances (EPS), dominated during the formation of initial SAGS aggregates. During phase II, fungi of the class Saccharomycetes, in particular the genus Geotrichum, became dominant and provided a matrix for bacterial attachment. This mutualistic interaction supported the rapid development and maintenance of mature SAGS. This work characterizes a robust approach for the rapid development of SAGS for efficient saline sewage treatment and provides unique insight into the granulation mechanism occurring during the development process.