文献类型：期刊文献

英文题名：Saline short-term shock and rapid recovery on anammox performance

作者：Zhou, Jia-jia[1];Zhang, Xu[1];Zhuang, Jin-long[1];Xu, Tian-xiang[1];Liu, Yong-di[1,2];Li, Wei[1,2,3]

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

年份：2022

卷号：307

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20223012404291);WOS:【SCI-EXPANDED(收录号:WOS:000854097300002)】；

基金：This work was supported by National Natural Science Foundation of China (52170076), 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：Anammox; Saline short-term shock; Glycine betaine; Quorum sensing

摘要：Anaerobic ammonia oxidation (anammox) is an environmental-friendly biological nitrogen removal process, which has been developed as a promising technology in industrial wastewater treatment. However, anammox nitrogen removal under high saline conditions still faces many challenges. This study investigated the perfor-mance of anammox sludge under saline short-term shock and the strategy of rapid recovery. Salinity concen-tration, saline exposure time, and NaCl/Na2SO4 ratio were selected as three critical factors for short-term shock. The activity inhibition of anammox sludge were tested by using response surface methodology (RSM). Our results showed that, compared with the NaCl/Na2SO4 ratio, the salinity concentration and saline exposure time were the significant factor causing the anammox inhibition. The addition of glycine betaine (GB) in moderate amounts (0.1-5 mM) was found to help anammox to resist in relative low saline shock intensities (e.g., IC25 and IC50), with the activity retention rate of 94.7%. However, glycine betaine was not worked effectively under relatively high saline shock intensities (e.g., complete inhibition condition). Microbial community analysis revealed that Bro-cadiaceae accounted for only about 7.6% 13.2% at inhibited conditions. Interestingly, 16S rRNA analysis showed that the abundance of activated Brocadiaceae remarkably decreased with time after high-level saline shock. This tendency was consistent with the results of qPCR targeted hzsA gene. Finally, based on quorum sensing, the anammox activity was recovered to 93.5% of original sludge by adding 30% original sludge. The study realized the rapid recovery of anammox activity under complete inhibition, promoting the development and operation of salt-tolerant anammox process.