section is rectangle or trapezoids, the flat surfa ce shape is many for oval, the ditch internal water is deep general for 2.5 4.5 m, the breadth is deep compare for 2: 1, also have the deep water amount to 7 ms of, ditch inside average speed in water current is 0.3 ms/ S Oxidize ditch spirit admixture equipments contain surface spirit machine the spirit of turn to brush or turn the dish and shoot to flow the spirit machine, pipe type spirit machine with promote take care of type spirit machine etc. match with in recent years usage still contain underwater push machine [46] 3. The carrousel oxidizes the mechanism of the ditch 3. 1 The Carrousel oxidizes the ditch handles dirty and aqueous principle The at the beginning common Carrousel oxidizes the dirty water in inside in craft of the ditch direct with dirty mire in reflux together enter oxidize the ditch system The surface spirit machine makes fuse in the liquid of admixture the density of the oxygen do increases about 2 the 3 mgs/L. Under this kind of well the term of the oxygen the microorganism gets the enough deliquescence oxygen comes and go to divided by the bOD; At the same time, the ammonia were too oxidized nitrate with second nitrate, this time, mix with the liquid be placed in the oxygen appearance. In the spirit machine downstream after water current be become by the swift flow appearance of the spirit District of even flow the appearance the water current maintains in the minimum current velocity guaranteeing the live and dirty mire be placed in the floats the appearance. average current velocity >0.3 ms/ s)oxidize microbially the process consumed to fuse the oxygen in the water, until the value of do declines for zero, mixing ith the liquid report the anoxia appearance. Versa nitric that turn the function through anoxia area, mix with the liquid enter to have the oxygen area, completing once circulating That system inside, thesection is rectangle or trapezoids, the flat surface shape is many for oval, the ditch internal water is deep general for 2.5 ～ 4.5 ｍ , the breadth is deep compare for 2:1, also have the deep water amount to 7 ms of, ditch inside average speed in water current is 0.3 ms/ s.Oxidize ditch spirit admixture equipments contain surface spirit machine, the spirit of turn to brush or turn the dish and shoot to flow the spirit machine, pipe type spirit machine with promote take care of type spirit machine etc., match with in recent years usage still contain underwater push machine[4~6] . 3. The Carrousel oxidizes the mechanism of the ditch 3.1 The Carrousel oxidizes the ditch handles dirty and aqueous principle The at the beginning common Carrousel oxidizes the dirty water in inside in craft of the ditch direct with dirty mire in reflux together enter oxidize the ditch system.The surface spirit machine makes fuse in the liquid of admixture the density of the oxygen DO increases about 2 the 3 mgs/ L.Under this kind of well the term of the oxygen , the microorganism gets the enough deliquescence oxygen comes and go to divided by the BOD;At the same time, the ammonia were too oxidized nitrate with second nitrate, this time, mix with the liquid be placed in the oxygen appearance.In the spirit machine downstream, after water current be become by the swift flow appearance of the spirit District of even flow the appearance, the water current maintains in the minimum current velocity, guaranteeing the live and dirty mire be placed in the floats the appearance.( average current velocity>0.3 ms/ s)Oxidize microbially the process consumed to fuse the oxygen in the water, until the value of DO declines for zero, mixing with the liquid report the anoxia appearance.Versa nitric that turn the function through anoxia area, mix with the liquid enter to have the oxygen area, completing once circulating.That system inside, the