Castelló & Borzacconi [18] reported 70% nitrification and N90%
denitrification efficiencies when operating a lab-scale SBR in the posttreatment
of slaughterhouse wastewater. Their SBR was operated
with 12 h cycles under oxygen-limited conditions (0.7–0.9mgO2L−1) during the aerated reaction phase and sodium acetate addition as
carbon source in the anoxic reaction phase for denitrification.