Long Term Experience with Hollow Fibre Membrane Bioreactors


The membrane bioreactor (MBR) technology has been proven as a single step process to treat wastewater and produce an outstanding effluent quality suitable for reuse, either directly or as a pretreatment to reverse osmosis. While it is relatively simple to combine activated sludge with a membrane separation step, a number of challenges must be met to provide a process suitable for large-scale plants that can work under all design conditions, at a reasonable cost. Early MBRs were based on pressurized modules in recirculation loops, but the current state of the art involves immersing the membranes in the activated sludge and drawing the treated water by suction. This paper will summarizes 30 years of experience in designing and running MBRs.

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