【正文】 already at domestic and international and extensive application in live the dirty water to is dirty to manage aquecustv with the industlYli). Current application than oxidize extensively the ditch type include:The ( Pasveer) oxidizes the ditch, the (Carrousel) oxidizes the ditch, ( Orbal) oxidizes the ditch, the type of T oxidizes the ditch( three ditch types oxidize the ditch), the type of DE oxidizes the ditch to turn to oxidize the ditch with the Integral oxidize the ditch because of the difference of esse in construction with circulating, therefore each characteristics[2].This text will introduce construction, mechanism, existent problem and its latest developments that Carrousel oxidize ditches primarily. 2. The Carrousel oxidizes the construction of the ditch The Carrousel Oxidize the ditch to be researched to manufacture by Dutch DHV pany development in the last the panyofDHVinfou ndationoftheditchin theoriginal Carrousel to permited specially the pany EIMCO to invent again with its patent in the United States Carrousel 2000 system realizes the living creature of the higher request takes off the nitrogen with in the world up to now more than 850 Carrousels oxidize the ditch with the Carrousel 2000 system are circulating From diagram therefore, the Carrousel oxidizes the ditch the usage the spirit of that definite direction control with shake up the device, face to mix with the liquid deliver the level speed, from but make drive the liquid of admixture that shake up is in oxidize ditch shut match outlet circulate nowrnererore oxidize the ditch have the special hydraulics flows the ,current plete mix with the characteristics of the type reactor, have the characteristics that push the flow type reactor again, the ditch inside exsrts obviously of deliquescence oxygen density steps the ditch cross section is rectangle or trapezoids, the fiat surface shape is many for oval, the ditch internal water is deep general for 4 .5 m , the breadth is deep pare for 2:1, also have the deep wate r amount to 7 ms of, ditch inside average speed in water current is mS/ 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 machine3. The Carrousel oxidizes the mechanism of the ditch The Carrousel oxidizes the ditch handles dirty and aqueous principle The at the beginning mon Carrousel oxidizes the dirty water In inside In craft of the ditch direct with dirty mire In reflux together enteroxidize theditch surface spiritmachinemakesfuse In the liquid of admixture the density of the oxygen DO increases about 2 the 3 mgsl this kind of well the term of the oxygen, the microorganism gets the enough deliquescence oxygen es and go to divided by the BOD。Not the dirty mire in germ in form in silk inflation takes place primarily at the waste water water temperature is lower but the dirty mire carries higher microbial burthen is high, the germs absorbed the large quantity nourishment material, is low because of the temperature, metabolism the speed is slower, accumulating the rises large quantity is high to glue sexual and many sugar materials, making the surface of the live and dirty mire adhere to the water to increase consumedly, SVI the value is very high, being the dirty mire inflation. Cause that aim at the dirty mire inflation, can adopt the different counterplan:From the anoxia, water temperature high result in of, can enlargement tolerance or lower into the water measures to alleviate burthen, or the adequacy lowers the MLSS( control dirty mire reflux measure), making need the oxygen measures the dirty mirecarrieshigh, can increaseMLSS, toadjusttheburthen, necessity Foam problem Becauseentering totakethe greaseoflarge quantityinthewater, handling system can39。The mire is partial to long, the dirty mire is aging, and also easy creation topourthewaterordivided bywiththesurfacetheof do away with the foam, in mon use divided by the an organism oil, kerosene, the oil of stncon, throw deal as ~ mgsl to increase dirty mire in pond in spirit in density or adequacies let up the tolerance of ,also can control the foam creation contain the live materia! in surface in the waste water more, separate with the foam easily and in advance method or other methods do away can consider to increase to establish a set of dlvideding by the oil device enhance most importantly the headwaters manage, reducing to contain the oil over the high waste water and other poisonous waste water of into[llJ. Float the problem on the dirty mire When contain in the waste water the oil measures big, whole system mire quality bee light, can39。When spirit time over long, take place in pond the high degree nitric turn the function, making nitrate density high, at two sink the versa nitric in easy occurrence in pond turn the function, creation nitrogen spirit, make dirty mire ascend f1oat。Suchas enterthe watercarries big let upintothe water measures or the enlargement reflux as the dirty mire grain small lower the spirit machine turn discovers versanitricturning,shouldletup thetolerance,enlarge the reflux or row the mire measures。:. Current velocity is not all and the dirty mire sinks to accumulate the problem In Carrousel oxidize ditch, for acquiring its special admixture with handles result, mix with liquid must with certain current velocity is in ditch circulate generally, the lowest current velocity should should attain for an average current velocity for, doing not take place sinking acccmutetmq ~ msl spirit equipments that oxidize the ditch is general to turn to brush for the spirit of to turn the dish with the spirit of , turning to brush of immerse to have no depth for 25 0 ~300 mms, turn the dish immerse to have no depth for 4803