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\bibitem{Zhu_etal2023} {\textquotedblleft}\textit{Feasibility of a return-sludge nursery concept for mainstream anammox biostimulation : creating optimal conditions for anammox to recover and grow in a parallel tank}{\textquotedblright}. Zhu W, Van Tendeloo M, Alloul A, Vlaeminck SE, Bioresource technology \textbf{385}, 129359 (2023).   http://doi.org/10.1016/J.BIORTECH.2023.129359

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