Seven keys to membrane bioreactor success

The first generation of membrane bioreactors (MBRs) in the Pacific Northwest arrived around 2003. This new technology represents a considerable advancement over conventional wastewater treatment, particularly the ability to produce a high-quality reclaimed water product within a small physical footprint. As with any new technology, the past 15 years has led to many lessons that can be applied to design and operation. Manufacturers also are continuing to refine membrane technology and develop new products.During the past 15 years, seven topics have emerged as critical concerns to consider when working with MBRs. The guidance is intended toward modifying existing membrane bioreactors to improve performance and operability, as well as to provide guidance for design and operation of new membrane facilities. These topics are based on case studies, evaluations, and modifications at four MBR facilities.