NOVELTY - A screw feeder (2) comprising a transfer zone (2A) with a forward screw (2b), a stir zone (2B) with paddles (5) whose feed angle is set larger after becoming small and an outlet (2D) having a reverse screw (2d) for transferring a processed object to a discharge port (4), where the pulverizer (8) is set at the lower portion of the discharge port for pulverization of the processed object, is new.    USE - The screw feeder is used for mixing and pulverizing organic wastes (claimed) containing the livestock excrements of cows, pigs, hens and organic refuses including plant waste material such as pruned branches, mowed grass, wasted wood, etc., for promoting aerobic fermentation for manufacturing organic fertilizer.    ADVANTAGE - The generation of a bad smell can be prevented by mixing the livestock excrements and plant ground material etc. of the processed object uniformly with the paddles of the screw feeder. Each process of the mixing pulverization can be performed without making a bad smell drift around, since the mixed material which generates the bad smell are separated from the atmosphere by arranging the screw feeder and the pulverizer in the same casing. The kneading mixing zone and stir mixing zone can be integrated by adjusting the attachment angle of the paddles and giving each paddle with a feed function. The operation can be performed in an optimal state by making the attachment angle of the paddles to be alterable according to the property of the processed object. The first half of the stir zone effects a compressive force to press out the moisture content of the processed object by having made the attachment angle of the paddle larger after becoming smaller in order. The quantity of an offensive odor component absorbed in a moisture absorption material with the moisture content can be increased as a result. The generation of bad smell can be reduced as a result. The pulverization by the pulverizer of the following process becomes easy, since the compaction degree reduces in the second half of the stir zone. A sharp reduction in installation cost can be achieved and the propagation of organic fertilizers using livestock excrements as raw material can be promoted, since the subsequent aerobic fermentation process or a countermeasures against the bad smell of fermentation process are unnecessary.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional view of a mixing pulverization equipment.    Casing (1)    Screw feeder (2)    Screw shaft (2a)    Forward screw (2b)    Reverse screw (2d)    Transfer zone (2A)    Stir zone (2B)    Outlet (2D)    Discharge port (4)    Pulverization bar (7)    Pulverizer (8)