Purification of hydrilla verticillata- water hyacinth combinations in the urban river's simulation test research

摘要

Using the Hydrilla verticillata - water hyacinth combination to conduct the purification research, which simulates the urban river water, the experimental study discovery, compare with the still water condition and the move water condition which the velocity of flow is 1.74cm/s, it has slightly the superiority to NH_3-N, TP and DO purifies, the average elimination rate of NH_3-N and TP achieves 87.24% and 82.06%, the DO density of the moves water group fluctuation not to be big in the entire experimental process, maintains throughout in the 7.24～8.75 mg/L mg/L stable scope, but to TN and COD elimination rate, the still water group is higher than move the water group obviously, respectively achieves 81.71%, 76.64%.