AUTHOR=Xue Yu , Zheng Min , Wu Shuang , Liu Yanchen , Huang Xia TITLE=Corrigendum: Changes in the species and functional composition of activated sludge communities revealed mechanisms of partial nitrification established by ultrasonication JOURNAL=Frontiers in Microbiology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.1006638 DOI=10.3389/fmicb.2022.1006638 ISSN=1664-302X