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\bibitem{Cagnetta_etal2019} {\textquotedblleft}\textit{High-rate activated sludge systems combined with dissolved air flotation enable effective organics removal and recovery}{\textquotedblright}. Cagnetta C, Saerens B, Meerburg FA, Decru SO, Broeders E, Menkveld W, Vandekerckhove TGL, De Vrieze J, Vlaeminck SE, Verliefde ARD, De Gusseme B, Weemaes M, Rabaey K, Bioresource technology \textbf{291}, 121833 (2019).   http://doi.org/10.1016/J.BIORTECH.2019.121833

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