Reclaimed water is a critical source of water in Singapore and globally. Common practical limit of existing technology based on microfiltration/ultrafiltration-membrane bioreactor (MF/UF-MBR) + reverse osmosis (RO) for water reclamation is 75-85% recovery due to RO membrane fouling. A hybrid system consists of a high retention nanofiltration-membrane bioreactor (NF-MBR) + RO is developed to achieve more than 90% of water recovery at 10 L/m2.h flux rate. NF-MBR produces superior quality effluent because NF membrane can retain low molecular weight organics and scale forming divalent ions. Thus, membrane fouling in downstream RO process can be alleviated significantly, which allows higher recovery. In addition, the inherent advantages of lower fouling potential of RO feed water include: (i) reduced chemical usage and energy consumption associated with RO membrane fouling, (ii) extend the RO membrane lifespan, and (iii) reduced water production cost.The technology owner is interested in seeking technology licensing collaborator or manufacturing partner.
This technology could be applied in the following areas: Wastewater reclamation Industrial water recycling
High recovery water reclamation Lower chemical use, less energy consumption associated with RO membrane fouling Longer RO membrane lifespan Less sludge production Reduced water production cost