The operation program of the SBR system consisted of five steps: fill, react (aeration), settle (sedimentation/clarification),draw (decant) and idle (Metcalf & Eddy, 1991)
3.5 l of 10 g/l acclimatized bio-sludge was inoculated in each reactor of both the SBR and MSBR systems, and MIWW was added (final volume of 20 l) within 2 h(fill step).