Study on the Effect of Constructed Wetland in Treating Rural Domestic Sewage

Abstract

With the progress of modern science and technology, people’s living standard is getting higher and higher. The free discharge of production and domestic sewage has caused more and more serious water pollution. The focus of sewage treatment is generally in the city, the rural sewage treatment is often neglected. According to the results of the first national pollution census, the discharge of pollutants in rural areas has a serious impact on the water environment, with COD, nitrogen and phosphorus accounting for 43.7%, 57.2% and 67.4% of the total. China produces about 80 billion tons of rural sewage every year. In rural sewage, 90% of domestic sewage is directly discharged without effective treatment, causing serious water pollution, and sewage treatment is urgent. In this paper, the situation of sewage treatment in rural A of Fujian Province is analyzed, and a constructed wetland is designed according to the actual situation. The constructed wetland has the advantages of simple sewage treatment and maintenance, low operating cost and relatively small consumption. It can also save land resources, can be widely transported to sewage treatment, and can better protect the water environment and aquatic ecosystem.