Szukana fraza: [Abstract = "The paper presents preliminary results of the research on the efficiency nitrogen removal in a hybrid sequencing batch reactor MBSBBR operating at low dissolved oxygen \(DO\) concentration ranging between 0,5 and 2 mg O_2\/l. The study was carried out in a pilot scale model of SBR with a total volume of 35 liters, filled with carrier media up to the volumetric ratio 7,5 % of the fill volume."]