Full FormMoving Bed Biofilm ReactorSequential Batch ReactorMembrane Bioreactor

It is suspended growth biological treatment process. This process uses biofilm attached to thousands of small plastic media to decompose waste present in influent in an aeration tank.

It is a fill-and-draw type activated sludge system. It has 4 operational stages in a single reactor i.e. fill, aeration, settling and decantation.It is a combination of membrane process and suspended growth biological treatment process. Biomass is developed in aeration basin by providing air and nutrients.
Applied TechnologyUses suspended growth biological techniqueUses phase separation with gravity settling method. (Conventional ASP method)Uses membrane technology.
Power ConsumptionLow Power Consumption.Low power consumption.Comparatively more power consumption.
Retention TimeIt requires very low HRT for BOD & Nitrogen removal.Low HRT required as compared to conventional ASP.It requires least SRT (Sludge Retention Time).
Space RequirementSystem requires small amount of space, since only one tank is needed and also surface area is maximized through carriers.Comparatively requires more area but when compared to conventional treatment system requires less space. Better space managementRequires less area due to use of membranes.
Cost ParameterHigh operational cost.Expensive method as compared to conventional method.High capital and operational cost.
Adaptability to FluctuationsEffectively resists shock loading and can respond to variations in influent.This system adapts to different volumes of influent.Adaptation to fluctuations & shock loading is difficult for this system.
MaintenanceNeeds low maintenance as backwashing not needed but media replacement & checking is cumbersome task.Needs more maintenanceNeeds more maintenance.
ShortcomingsThe system can attract insects with specific system models not designed to keep them out.Prone to problems like clogging of aeration devices.Membrane clogging is an issue. Requires frequent backwashing.
Monitoring StatusRequires continuous monitoring of media.Better operation control as operates in batch mode. Requires automation.Requires sophisticated controlling system
Level of TreatmentGood removal of pollution load.Similar treatment levels as compared to conventional ASP.High level of treatment achieved.
BenefitsIncreased surface area due to application of plastic media is an added advantage in this case.Contains anoxic zone which provides control over denitrification.Does not require tertiary/ disinfectant treatment in most cases.
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