Abstract:With the increasing attention of the country and the public to the rural ecological environment, how to effectively restore the rural rivers has become a current research hotspot. Taking Pujin Street in Minhang District as an example, the pollution characteristics and pollutant sources of the river are analyzed on the basis of the study on its water ecological status. And based on the principle of green ecological restoration, the restoration ideas of building the river ecosystem spatially by means of ecological buffer zone, river channel and plant cultivation are proposed. Further according to the water pollution characteristics, the technical measures of substrate improvement, ultraviolet catalysis, submerged aeration, bottom biological carrier, ecological floating island, floating grass mat and point source purification for prevention and control of endogenous pollution are worked out. The comparison results of river survey and water quality detection before and after treatment show that the river water ecology restoration is better, the dissolved oxygen concentration has increased significantly and the total phosphorus has been effectively controlled after treatment. In the later stage, the aeration can be regulated according to the dissolved oxygen concentration of the water body to promote the removal effect of ammonia nitrogen.
