MBBR ke mofuta o mocha oa biofilm reactor, e leng mofuta o mocha o ntlafalitsoeng oa composite biofilm reactor e ntlafalitsoeng motheong oa bethe e sa fetoheng, bethe e nang le metsi le sefa sa baeloji. E hlola mefokolo ea mochini o phefumolohang oa bethe o hlokang ho hlatsuoa khafetsa, mochini o hlatsoang libethe o hloka ho ntša metsi, 'me mochini o kenang ka tlas'a metsi o koala lisebelisoa ebe o nkela aerator sebaka, ebe o boloka litšobotsi tsa mokhoa oa setso oa biofilm. boima ba ho tshoha, tlhahiso e tlase ya seretse le dilemo tse telele tsa seretse. Ha ho bapisoa le mokhoa oa sludge o kentsoeng, ka lebaka la nako e telele ea seretse, e ka boloka libaktheria tse nang le nitrifying mme e na le phello e ntle ea denitrification. Molao-motheo o ka sehloohong ke ho sebelisa likhoerekhoere ho tsoela pele ho phalla ka har'a mochini o tsamaisang thepa, ho theha biofilm ho sejari, 'me likokoana-hloko li tla ata le ho hola ho biofilm ha li ntse li nyenyefatsa litšila tsa tlhaho ka har'a likhoerekhoere, e le hore li ka bapala karolo ea ho hloekisa likhoerekhoere.