An Experimental Study of Purification of Nitrogen in Artificial Water by Floating Bed Combined Process

In order to study the purification effect of nitrogen in artificial wastewater treated by combined process of floating bed, under the outdoor condition, by using a self-designed and assembled floating bed as a carrier, the artificial wastewater prepared from mixing lake water with tap water in a volume ratio of 1:1 and added with a certain amount of nutrient elements of different combinations was treated for 54 d, and auxiliary process combined with aeration, adding sludge and artificial grass were employed, the effect of degradation of nitrogen in artificial wastewater under different process conditions was analyzed. The results show that the removal rate of NH₄⁺-N in the artificial wastewater under the combined process conditions of aeration, sludge and artificial grass was 89.9% on the 6th day, the mass concentration of NH₄⁺-N is 0.71 mg/L on the 39th day, the removal rate is 97.4%, and the water quality reaches Class Ⅱ standard of surface water. At the end of the experiment, the removal rate of NH₄⁺-N reaches 97.6% in the tanks with aeration.Aeration has a good effect on promoting nitrogen removal in artificial wastewater and combination of it with floating bed process can be used to treat water bodies such as lakes and ponds.