Ts'ebetso ea MBBR e na le melemo ea bethe ea setso le mokhoa oa ho kopanya oxidation ea likokoana-hloko, 'me ke mokhoa o mocha le o sebetsang oa ho hloekisa likhoerekhoere, o itšetlehileng ka ho phalla ha metsi le ho phalla ha metsi ka tanka ea aeration ho etsa hore sepalangoang se be boemong ba metsi, ebe joale. e etsa hore seretse se kentsoeng se emisitsoeng le biofilm e khomaretsoeng, e etsang hore biofilm ea bethe e tsamaeang e sebelise sebaka sohle sa reactor, e fana ka papali e felletseng molemong oa karolo e hoketsoeng le fanyehiloe mokhahlelo phelang, le etsa hore ho ntshetsa pele matla a eona le ho qoba mefokolo, le tlatsana. Ho fapana le li-filler tse tloaelehileng, li-filler tse emisitsoeng li tsejoa e le "mobile biofilms" hobane li kopana khafetsa le khafetsa le likhoerekhoere.