NOVELTY - Livestock excretion processing device comprises a sedimentation tank provided with an organic substance oxidation tank and a solid-liquid separated supernatant exporting pipe, an inlet port for circulating and re-supplying air and oxygen trapped in an air pocket into a certain distance away from the water level of the livestock excretion using an aerator and exposing the region of the air pocket, and a manhole arranged on the upper surface of the organic substance oxidation tank and is provided with a lid for avoiding discharge of odor and bubble to the outside.    USE - Used as livestock excretion processing device (claimed).    ADVANTAGE - The device oxidation and fermentation under optimum and stable conditions by using oxygen, automatically controls oxygen and air supply amount, detects suspended solids concentration of livestock excretion in real-time, avoids non-significant process, reduces installation cost of the product, does not require separate conveying unit, is environmentally friendly, blocks leakage of odor and bubbles to the outside and back flowing of the air pocket, automatically introduces livestock manure to the side of the manure tank and supernatant of livestock manure to the side of the organic substance oxidation tank by the inverted U-shaped pipe, has improved reliability and stability, improves performance of the product, recycles residual oxygen, and prevents explosions and unnecessary increase in pressure within the organic substance oxidation tank.    DETAILED DESCRIPTION - Livestock excretion processing device comprises a sedimentation tank (10) provided with an organic substance oxidation tank (20) and a solid-liquid separated supernatant exporting pipe, an inlet port (11) for circulating and re-supplying air and oxygen trapped in an air pocket into a certain distance away from the water level of the livestock excretion using an aerator and exposing the region of the air pocket, a manhole (21) arranged on the upper surface of the organic substance oxidation tank and is provided with a lid for avoiding discharge of odor and bubble to the outside, and a check valve for automatically supplying air and oxygen trapped in the air pocket to one side of the aerator by external pressure. The organic substance oxidation tank is equipped with a manure tank through the exporting pipe for fermenting and oxidizing livestock manure by using various organic matters. The outer side of the organic substance oxidation tank is installed with an air supplying unit and an oxygen supplying unit. The bottom of the organic substance oxidation tank is provided with the aerator for evenly spraying air and oxygen in dropwise manner supplying through an air supplying pipe and an oxygen supplying pipe into the livestock excretion from the air supplying unit or the oxygen supplying unit and controlling a control panel. The inner side of the organic substance oxidation tank is equipped with a suspended solid measuring unit provided with the control panel for measuring amount of suspended solids in the manure in real-time. The air supplying pipe and the oxygen supplying pipe are provided with a parallelly connected air inlet pipe and an oxygen inlet pipe, the air inlet pipe and the oxygen inlet pipe are installed with a solenoid valve for controlling air and oxygen supply. The control panel maintains the suspended solids concentration of livestock manure less than the predetermined concentration by automatic controlling each opening and closing amount of the solenoid valve and compares the concentration of suspended solids and the predetermined concentration. The sedimentation tank and the organic substance oxidation tank are installed with an inverted U-shaped pipe. The exporting pipe is installed on the upper wall between the organic substance oxidation tank and the manure tank. The supernatant is obtained by removing relatively large foreign substances, transferring by a removable livestock manure collecting carriage, and precipitating minute suspended solids introduced through an introduction pipe (12) equipped with an inlet port.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the livestock excretion processing device (Drawing includes non-English language text).    Sedimentation tank (10)    Inlet port (11)    Introduction pipe (12)    Organic substance oxidation tank (20)    Manhole (21)