AUTHOR=Erijman Leonardo , Campanaro Stefano , Etchebehere Claudia , Varesche Maria Bernadete Amancio TITLE=Editorial: Meta-omic Approaches to the Complex Anaerobic Communities in Wastewater Treatment Plants and Digesters JOURNAL=Frontiers in Microbiology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2021.664716 DOI=10.3389/fmicb.2021.664716 ISSN=1664-302X