The Moving Bed Biofilm Reactor (MBbr) wastewater treatment process from Kaldnes North America Inc.,
Providence, R.I., can be retrofitted on existing wastewater treatment tanks to triple capacity, and
can meet updated effluent guidelines concerning ammonia and nitrogen without requiring additional
tankage.The MBbr process reduces biochemical and chemical oxygen demand by utilizing thousands of
small, polyethylene biofilm elements that provide a space for a large, highly active bacteria
culture. These elements are kept in constant motion throughout the volume of the reactor, resulting
in uniform treatment and a reduced plant footprint.