The mass of the soil bacterium which was multiplied in the reactor tower filled up with the humus pellets, is circulated in the circle of the wastewater treatment. This system is to the decrease in the quantity of the excess sludge, elimination of the odor, the stability of the treated wastewater.

Bioreactor filler is the high technological water treatment system which is combined with the agitator and the special fiber-processed contact media . This system is also available for the limited space.