Activated sludge treatment combined with membrane filtration — the smallest footprint and the highest treated water quality among STP technologies.
In an MBR plant, sewage is treated biologically in an aeration tank, and the mixed liquor is then filtered through submerged ultrafiltration membranes instead of a conventional settling tank. The membranes physically block suspended solids and bacteria.
Because separation does not depend on gravity settling, the biology can run at a much higher concentration — the plant becomes far more compact and the treated water is clear enough for direct reuse in flushing, gardening and cooling towers.
Raw sewage is screened and balanced in an equalisation tank.
Aeration tank biology consumes organic load at high MLSS.
Submerged UF membranes separate clean permeate from sludge.
Permeate is disinfected and stored for reuse or discharge.
Excess sludge is wasted from the aeration tank and dewatered.
Final specifications are engineered per site after water analysis and requirement study.
A walkthrough of an MBR plant in operation.