To treat high density synthetic leather waste water, the author used static and dynamic simulated test to analyze the operation of model pond. Because of the limitation of classic static and dynamic experience on analyzing dynamic biological decomposition reaction (DBDR), thc author suggested a new method- Section Initial Velocity Method. The actual experiment proved that reaction progression is changeable and may be increased in the direction of water flow in the model pond. And the change range is between 0-2.5.
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