TY - JOUR N2 - The aim of the study was to determine the impact of selected factors on the reduction of organic pollutants, expressed in BOD5 and CODCr, in wastewater treated in a laboratory scale model of moving bed biofilm reactor (MBBR). The factors included in the experiment: the degree of filling the fluidized bed with biomass carriers, hydraulic load, and aeration intensity. The tested model of the bioreactor consisted of five independent chambers with diameter D = 0.14 m and height H = 2.0 m, which were filled with biomass carriers at 0%, 20%, 40%, 60%, 70% of their active volume. During the test period, hydraulic loads at the level of Qh1 = 0.073 m3·m-2·h-1 and Qh2 = 0.036 m3·m-2·h-1 were applied, which ensured one-day and two-day sewage retention, respectively.The said reactors were subjected to constant aeration at P1 = 3.0 dm3·min-1 and P2 = 5.0 dm3·min-1. The highest efficiency of the reduction of the analysed indicators was demonstrated by reactors filled with carriers in the degree of 40–60%. Based on the statistical analyses (the analyses of the ANOVA variations and the Kruskal-Wallis test) carried out, it was found that the studied factors significantly modified the mutual interaction in the process of reducing BOD5 in treated wastewater of the reactors tested. The significance of the impact of the discussed factors on the values of the studied indicators in treated wastewater depends on mutual interactions between the investigated factors. L1 - http://www.journals.pan.pl/Content/112229/PDF/Archives%20vol%2045%20no%203__8.pdf L2 - http://www.journals.pan.pl/Content/112229 PY - 2019 IS - No 3 EP - 71 DO - 10.24425/aep.2019.128642 KW - organic matter removal KW - domestic wastewater KW - hydraulic load KW - moving bed biofilm reactor A1 - Śliz, Paulina A1 - Bugajski, Piotr A1 - Kurek, Karolina PB - Polish Academy of Sciences VL - vol. 45 DA - 30.08.2019 T1 - Effect of selected factors on the removal of organic matter in a model of moving bed biofilm reactor SP - 64 UR - http://www.journals.pan.pl/dlibra/publication/edition/112229 T2 - Archives of Environmental Protection ER -