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The OGO process OCO process on the basis of our group test analysis and improvement, the formation of a simple, efficient, economical sewage nitrogen and phosphorus removal process. The process has been won the national utility model patents (ZL2005 2 0010545.7). Of this thesis is to use the method of the test and CFD simulation research OGO reactor underwater propeller position the convection state as well as the impact of nitrogen and phosphorus removal. Experimental study of the research are as follows: (1) of OGO flow pattern; (2) the use of the the FLUENT software of the the OGO system flow field numerical simulation; (3) research OGO system in two different underwater propulsion position system nitrogen and phosphorus removal; (4) research the OGO systems within the denitrification phosphorus removal. Tracer test OGO system stream state, the results show: the stream flow pattern within the Ogo reactor is presented as a whole complete mixing flow and partial plug flow stream type characteristic, but in a different underwater pusher configuration - Configuration 2 (A and B operate simultaneously) than plug flow phenomena configuration (only starting B) has been enhanced, the series of reactor stirred tank number (N) tended to increase; and a smaller percentage of dead zone , higher capacity utilization. By computational fluid dynamics software FLUENT establish the mathematical model, a mathematical simulation of the flow field configuration of the OGO system in two different underwater propulsion, flow rate measured velocity contrast obtained by simulation, simulation is reliable and feasible. Two different configurations of the OGO system nitrogen and phosphorus removal, two ways of sewage has better removal of organic matter and nitrogen and phosphorus removal, configuration, and one pair of COD, TN, NH3-N, PO43-P the average removal rate of TP were 90.03%, 71.94%, 82.51%, 81.38% and 87.03%, respectively. But the configuration is relatively slightly, COD, TN, NH3-N, PO43 - P, TP average removal rate reached 91.33%, 76.12%, 83.97%, 83.47% and 89.21%, respectively. Test combined with flow pattern obtained configuration is more reasonable way, and further research the OGO system in this configuration denitrification phosphorus removal, and influencing factors denitrifying phosphorus. This study is the small towns of western China environmental infrastructure, affordable technology and demonstration (the Dutch government grant project) and the National Natural Science Foundation \. The research content of this paper can provide the basis for for OGO process engineering applications.
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