The behavior and removal method of phosphorus in constructed wetland

Phosphorus is removed by the filler, microorganism and plant in constructed wetland, the adsorb and precipitate of the filler are the main removal aspects of phosphorus. In order to research the removing effect of phosphorus in constructed wetland. We constructed two imitated unit with detritus and thin sand for filler, and one unit plant reed, another plant nothing. The experiment explained that the first unit can removal 92% of the total phosphorus, 67.35% of total phosphorus was removed depend on the upper filler, a lot of total phosphorus was removed by the conjunction of plant, microorganism and filler, which accelerated the remove speed of phosphorus. The main problem and counterplan of phosphorus removal in constructed wetland are discussed at last.