Relationship between microbial community structures and degradation efficiencies in biological contact process on domestic sewageHusseini Sulemana, Emmanuel Nkudede, Bo Zhang, Anthony Adebayiga Kosiba and Zaina Omary MochiwaE3S Web Conf., 261 (2021) 04004DOI: https://doi.org/10.1051/e3sconf/202126104004