The MBR reactor contains submerged Kubota Type 510 microfiltration plate and frame membranes (single plate: 0.8 m 2 ) with 0.4 µm pore size, made of chlorinated polyethylene. The MBR tank has a total volume of 126 m 3 . It is separated by a barrier in two compartments connected by a spill. One compartment is designed only for biodegradation, the other for biodegradation and membrane filtration; this gives maximum flexibility for adjusting aeration to the needs of the filtration and biodegradation process.