In high charged systems, the biological stage is presented with a high organic load and the combined floc and organic material is then oxygenated for a few hours before being charged again with a new load.
En sistemas de carga alta, a fase biolóxica ten unha alta carga orgánica e os flóculos e material orgánico combinados son despois oxixenados durante algunhas horas antes de seren cargados outra vez cunha nova carga.