The Process and Water Quality Specialists
With the direct application of membrane filtration for solid-liquid separation, the MBR process eliminates the restrictions on mixed liquor suspended solids (MLSS) concentrations that are typical of conventional biological processes with sedimentation. As a result, the biological reactor design has more active biology in a given volume with higher MLSS concentrations, which further helps to reduce the footprint and provides a treatment plant with “more bang for the buck”. Today’s MBRs typically operate in the 8 to 10 g/L range due to restrictions on oxygen transfer with fine bubble aeration. It is our opinion that industry’s desire to further reduce energy requirements may reveal new technologies that eliminate current MLSS limitations with non-conventional oxygen transfer equipment.