文献类型：期刊文献

英文题名：Performance, sludge characteristics and microbial community in a salt-tolerant aerobic granular SBR by seeding anaerobic granular sludge

作者：Lei, Lei[1];Yao, Jin-chi[1];Liu, Yong-di[1,2,3];Li, Wei[1,2,3,4]

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

年份：2021

卷号：163

外文期刊名：INTERNATIONAL BIODETERIORATION & BIODEGRADATION

收录：;EI(收录号：20212310470333);WOS:【SCI-EXPANDED(收录号:WOS:000676107900003)】；

基金：This work was supported by National Key Research and Development Program of China (2019YFC0408202), National Natural Science Foundation of China (51808223), Shanghai Educational Development Foundation (18CG34), Shanghai Rising-Star Program (20QC1400500) and State Key Laboratory of Pollution Control and Resource Reuse (PCRRF20024).

语种：英文

外文关键词：Anaerobic granules; Salt-tolerant AGS; Performance; Microbial community; qPCR

摘要：Salt-tolerant aerobic granular sludge (SAGS) technology is currently a topic of significant interest in research focused on the treatment of saline wastewater. However, the structural stability and nitrogen removal efficiency of SAGS cultured from activated sludge has been found to be insufficient. In this study, an efficient strategy for the cultivation of SAGS, seeding anaerobic granular sludge in a SBR, was explored. Performance results showed that at 3% (w/v) salinity, the chemical oxygen demand (COD), NH4+-N and total nitrogen (TN) removal efficiency was 93.3 +/- 1.3%, 92 +/- 6.5% and 76 +/- 8.4%, respectively. The morphology and settling properties of granules did not change significantly. Bacterial community analysis revealed that the dominant AOB and denitrifiers in SAGS were likely to be Nitrosomonas and Defluviimonas, respectively, while the abundance of NOB of Nitrospira was very low. qPCR results showed that the abundance of nirS and nirK decreased significantly under high salinity conditions, which likely explains the relatively low efficiency of TN removal and NO2--N accumulation. This study describes a new SAGS culture strategy and promotes the development of salt-containing wastewater biological treatment technology.