NOVELTY - The bio-stabilizer comprises a rotatable cylindrical housing formed by combination of tubes (1) on a pair of supporting and bearing units (3), and a unit for positioning the tube in longitudinal position. The tubes are separated and connected together by a sealing unit (2), and form a space between them. An annular flap is secured to one of the tubes and is bearing on the other tube overlapping the space. The flap is mounted in an interior and an exterior of the housing. The annular flap is intended to ensure the seal between the tubes.    USE - The bio-stabilizer is useful in an organic waste treatment equipment.    ADVANTAGE - The bio-stabilizer can be easily and rapidly installed, reduces or even eliminates breakage phenomena, between cylinder carrying units, caused due to excessive fatigue of the cylinder wall, can be manufactured in an economical manner, and improves quality of organic waste treatment process.    DETAILED DESCRIPTION - The bio-stabilizer comprises a rotatable cylindrical housing formed by combination of tubes (1) on a pair of supporting and bearing units (3), and a unit for positioning the tube in longitudinal position. The tubes are separated and connected together by a sealing unit (2), and form a space between them. An annular flap is secured to one of the tubes and is bearing on the other tube overlapping the space. The flap is mounted in an interior and an exterior of the housing. The annular flap is intended to ensure the seal between the tubes. Each tube is rotatably mounted on supporting and bearing units that are provided at each longitudinal end of the tube or in the vicinity of the tubes. The supporting and bearing units comprise carriages, which comprise motorized rollers. The positioning unit comprises a ring carried by the tube, a pair of rollers mounted on a fixed component of bio-stabilizer, and a ring rear provided between the rollers.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a biostabilizer.    Tube (1)    Sealing unit (2)    Supporting and bearing units (3)    Hopper (11)    Extraction zone. (12)