随着社会经济的高速发展和世界人口急剧增多,城市的扩展使水资源短缺日益严重,中水作为城市的第二水源被人们大量的推广及应用,使污水处理后用于生活杂用,这样不但减少污染排放,使污水变得无害化,又增加了水资源。所以中水的处理是保护环境,缓解水资缺失的重要途径。 With the rapid socio-economic development and the rapid increase in the world population, the expansion of cities has made the water shortage increasingly serious. As the second water source for the city, the water has been popularized and applied by a large number of people and used for miscellaneous purposes after sewage treatment. Not only to reduce pollution emissions, so that sewage has become harmless, but also increased water resources. Therefore, the treatment of water is to protect the environment, an important way to ease the lack of water.