The document compares membrane bioreactors (MBR) and moving bed biofilm reactors followed by ultrafiltration (MBBR-UF) for wastewater treatment. MBR immerses membranes directly in mixed liquor, resulting in high fouling and energy use. MBBR-UF separates biological and membrane processes, maintaining low biomass levels and fouling for the UF membranes. This allows for higher flux rates, lower energy use, and reduced capital and operating costs compared to conventional MBR systems.

1. MEMBRANE BIOREACTORS AS - MBR Vs MBBR - UF EEC GLOBAL OPERATION By: C.S. Umre Technical Director

3. TO AVOIDE LOW FOULING CONDITIONS IN AS - MBR MBR HIGH MEMBRANE FOULING ENVIRONMENT HIGH ENERGY CONSUMPTION INTENSIVE PRESCREENING & DISPOSAL LARGE EQUALIZATION BASIN HIGH MEMBRANE AREA SUBSTANTIAL OPERATOR TRAINING

12. ENERGY CONSUMPTION COMPARISION 9% 9% MISCLLANEOUS 17% 35% PROCESS AIR BLOWERS NOT REQUIRED 18% RECIRCULTION PUMPS NOT REQUIRED 38% MEMBRANE AIR BLOWER MBBR - UF AS - MBR 26% 100% TOTAL

13. MBR AND MBBR – MBR COMPARISION MODERATE MODERATE FOOT PRINT MODERATE LOW PEAK F:OW TOLERANCE LOW HIGH SCREENING REQUIREMENTS HIGH LOW OXYGEN TRANSFER EFF. NIL HIGH AIR SCOUR ENERGY NIL HIGH RECIRCULATION ENERGY MODERATE HIGH MEMBRANE COST MODERATE HIGH MEMBRANE REQUIREMENT MODERATE LOW MEMBRANE FLUX LOW HIGH MLSS MEMBRANE FOULING MBBR – UF AS - MBR