Ka'idar tsarin MBBR ita ce ƙara haɓakar halittu da nau'ikan da ke cikin injin ta hanyar ƙara wani adadin mai ɗaukar hoto zuwa ga reactor, don inganta ingantaccen jiyya na reactor. Saboda yawan filler yana kusa da na ruwa, an haɗe shi gaba ɗaya da ruwa a lokacin iska, kuma yanayin haɓakar ƙananan ƙwayoyin cuta shine gas, ruwa da m. Sakamakon karo da juzu'i na mai ɗaukar hoto a cikin ruwa yana sa iskar kumfa mafi kyau kuma yana ƙara yawan amfani da iskar oxygen. Bugu da ƙari, kowane mai ɗaukar kaya yana da nau'in halittu daban-daban a ciki da waje, wasu kwayoyin cutar anaerobic ko ƙwayoyin cuta suna girma a ciki, kuma waje yana da kyau kwayoyin trophic, ta yadda kowane mai ɗaukar hoto ya zama ƙaramin reactor, ta yadda nitrification reaction da denitrification dauki ya wanzu a lokaci guda. lokaci, don inganta tasirin magani.
