NOVELTY - A treatment tank (2) which treats crushed organic refuse by microorganisms, has a cylindrical crushing tank (3) having cutting protrusions at inner periphery. High pressure air is supplied to the crushing tank so as to stir the organic refuse.    USE - Organic-refuse processing apparatus of under water decomposition type.    ADVANTAGE - The organic refuse in the crushing tank is stirred forcefully by aeration air and the refuse is crushed into grain size due to the protrusions in the crushing tank, therefore crushing disposer is made unnecessary. The arrangement of the obstacle plates provides compact structure. Provides simple structure. Since the residue dry tank has bottom of cone or pyramid shape, the viscosity of the sludge is high and the whole sludge is dried easily. The scattering prevention enclosure avoids scattering of the sludge. Due to defoaming steam separator, accumulation of sludge does not arise and cleaning becomes unnecessary. The obstacle plates increases the flow rate of air.    DETAILED DESCRIPTION - A treatment tank (2) which treats crushed organic refuse by microorganisms, has a cylindrical crushing tank (3) having cutting protrusions at inner periphery. High pressure air supplied to the crushing tank is aeration air supplied to treatment tank. Aeration air is supplied in order to supply oxygen to microorganisms in the treatment tank. A drying and removal unit (4) which dries and removes residue sludge, is connected to the treatment tank. The removal unit has residue dry tank having conical or pyramidal bottom. A scattering prevention cylindrical enclosure is arranged at preset interval in the upper portion of residue dry tank. A sludge inflow pipe allows residue sludge to flow towards bottom portion of the residue dry tank from the treatment tank. An air feed pipe supplies high pressure air towards residue sludge of residue dry tank and blows up the residue sludge. A drying unit installed in the housing. has a compressed air blower to supply air into the housing through the air inlet and for supply of aeration air to the treatment tank. The exhaust gas is ejected through a defoaming steam separator from the upper space of the treatment tank. The defoaming steam separator has lower portion dipped in decomposition liquid of the treatment tank , such that collected bubble is directly returned to the decomposition liquid. The defoaming steam separator has alternately arranged upper and lower obstacle plates arranged vertically along with horizontal plates in between lower obstacle plates.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the organic refuse processing apparatus.    organic refuse processing type (1)    treatment tank (2)    crushing tank (3)    residue drying and removal unit (4)    dried residue removal tank (6)