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\bibitem{Seuntjens_etal2020} {\textquotedblleft}\textit{Mainstream partial nitritation/anammox with integrated fixed-film activated sludge : combined aeration and floc retention time control strategies limit nitrate production}{\textquotedblright}. Seuntjens D, Carvajal Arroyo JM, Van Tendeloo M, Chatzigiannidou I, Molina J, Nop S, Boon N, Vlaeminck SE, Bioresource Technology \textbf{314}, 123711 (2020).   http://doi.org/10.1016/J.BIORTECH.2020.123711

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