Purification of water hyacinth in the urban river´s simulation test research

Using the water hyacinth to conduct the purification research,which simulates the urban river water , the experimental study discovery, compare the still water condition with the move water condition which the velocity of flow is 1.74 cm/s, water hyacinth has slightly the superiority to DO, NH₃-N, TN purifies at the move water condition, in the experimental process the DO average density respectively achieves 7.975 mg/L and 7.066 mg/L.To the ammonia nitrogen elimination rate respectively achieved 80.81% and 78.49%, to the total nitrogen, the elimination rate respectively are 82.26% and 80.59%.but to the elimination rate of TP, COD and the turbidity,the still water group gets the advantage slightly,the TP elimination rate respectively achieved 81.02% and 83.77%the COD elimination rate respectively are 73.96% and 86.99%, to the turbidity respectively is 44.24% and 90.62%.