Municipal sewage (municipal wastewater) A general term for sewage discharged into the urban sewage system. In the combined drainage system, production wastewater and rainwater interception are also included.
First, from the perspective of water quality and treatment technology, urban domestic sewage, especially the domestic sewage without flushing and drainage, has good water quality and high organic matter content. Many uses of water in cities, such as cooling, flushing, building, irrigation, etc., do not require high water quality. Sewage utilization technology has been developed and mature, and water treatment technology can fully meet its technical support.
Second, from the perspective of water quantity, urban sewage volume and water consumption are almost equivalent, and rainwater has the characteristics of seasonality and randomness, which can be used as urban reclaimed water.
Third, from the perspective of engineering construction, the use of urban sewage and rainwater need to use equipment far smaller than the use of tap water required by the amount of engineering.
Four, from the economic point of view, not only save pure water resources, but also reduce the cost of sewage, reduce the cost, there are significant economic benefits.