Fluence - Membrane Aerated Biofilm Reactors (MABR) - Whitepaper

An MABR is a biological process unit that utilizes conventional treatment processes for pre- and post-treatment. The pre-treatment process is similar to that in conventional activated sludge plants and preferably includes an oil and grit separator, fine screens and an equalization tank, as shown in Figure 3. Oil separation is generally recommended in cold weather and at specific sites where excess FOG is anticipated. Equalization is commonly provided to ensure high performance of the secondary clarifier, especially at smaller treatment plants where flow variation is higher. However, the fine screening requirement is specific to the MABR, and is similar to membrane bioreactor (MBR) pretreatment requirements.