WCW24

Biomass densification is an efficient way to intensify conventional activated sludge by improving mixed liquor settling characteristics. External physical selection via hydrocyclones combined with adequate biological selection in continuous flow bioreactors helps to maximize densification performance. Although Membrane Bioreactors (MBR) are not directly impacted by settling characteristics, preliminary work indicates that continuous flow densification can improve mixed liquor filterability, which could have a positive impact on MBR operation. This presentation explores the coupling of densified biomass with continuous flow MBR. The main topics covered include: process concept, modeling, full-scale demonstration plant and expected benefits for MBR design and operation including reduced OPEX, improved sludge quality, and improved performance.