文献类型：期刊文献

英文题名：The short- and long-term effects of formic acid on rapid nitritation start-up

作者：Wang, Ji-peng[1,2];Liu, Yong-di[1,2,3];Meng, Fan-gang[4];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]Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou, Guangdong, Peoples R China

年份：2020

卷号：135

外文期刊名：ENVIRONMENT INTERNATIONAL

收录：;EI(收录号：20195007802572);WOS:【SCI-EXPANDED(收录号:WOS:000506229000062)】；

基金：This work was supported by National Natural Science Foundation of China (No. 51808223 and 51578240), Fundamental Research Funds for the Central Universities (No. 222201814053 and 222201817009) and Research Fund Program of Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (No. 2018K16).

语种：英文

外文关键词：Formic acid; Nitritation; Rapid start-up; Stable operation; Microbial succession

摘要：The feasibility of achieving stable nitritation inoculating with activated sludge by adding formic acid was studied in this work. Short-term batch effects of formic acid on nitrification showed that the nitrite accumulation ratio (NAR) significantly increased from 0.3% to 83.7% with an increase of formic acid concentration from 0 to 50 mM at an initial ammonia concentration of 75 mg.L-1, which was demonstrated to be due to the inhibition of nxrB transcription in nitrite oxidizing bacteria (NOB). The long-term effects of formic acid at 30 mM were constantly monitored in an aerobic sequencing batch reactor. During 27 days of operation, the NAR was rapidly raised and maintained approximately 90%. What's more, in the following 52 days without addition of formic acid, the NAR was kept above 91.3%. The sustained suppression of NOB genus Nitrospira coupling nxrB inhibition was the main reason to maintain stable nitritation. These results supported the feasibility of formic acid as an efficient nitritation regulator, thus providing a new approach for the development of the BNR process via nitrite pathway.