Treatment and utilization of wastewater in the Beijing Zoo by an aquatic macrophyte system

Abstract

This paper deals with a nutrient cycling experiment in the Beijing Zoo that uses macrophytes as the added link to make a purification system. The whole system consisted of macrophyte cultivating area and no macrophyte area. By making up the different functional groups of aquatic plants, a multilevel cycling network is formed, which has a rather high purification capability. During the experimental period, the water quality of the Waterfowl Lake and the Peony Pavilion Lake improved significantly, with total nitrogen and total phosphorus reductions of up to 58 and 38%, respectively. Other parameters also confirmed the good purification effect of this system. The economic and social benefits met the requirement of the original design.