EN
Carbon and nitrogen removal in dependence on the retention time and pollution loading was investigated using biomass immobilized inside macroporous ceramic carrier. Efficiency of carbon removal was 78%, nitrification rate ? 91,7%, denitrification rate ? 64,9%, when the technological parameter were: volumetric loading 5,9 g/dm3 d, hydraulic retention time 34 min, intrinsic recirculation 50 dm3/h.