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Drainage mode and choice of drainage system

Drainage system

The drainage system in the building can be divided into two types: the shunt system and the combined system. Diversion and drainage is the living building and public buildings in the domestic sewage, domestic waste water and industrial buildings in the production of sewage, production waste water, respectively, separate drainage pipeline. Combined sewer system refers to two or more than two kinds of sewage and waste water in the building. The building should be equipped with an independent roof rainwater drainage system, quickly and promptly to the outdoor rainwater drain pipe or ground. Rain water storage tank should be set up in water shortage area. 

 Drainage mode selection. The determination of the internal drainage should be based on the nature of the sewage, the degree of pollution, the outdoor drainage system, the development of the reclaimed water system, and the comprehensive utilization. 
 1. Using the drainage system: 
 1). When the sewage is combined with the two kinds of harmful gases or other harmful substances. 
 2). Hospital sewage contains a large number of pathogenic bacteria or containing radioactive elements exceeding the prescribed concentration of emission standards. 
 3). Without treatment and slightly after treatment can be reused when the water is large. 
 4). When the building water system needs to collect raw water; the catering industry and kitchen washing water contains a lot of oil. 
 5). Industrial waste water containing valuable industrial raw materials to be recycled and contains a large number of minerals or toxic and harmful substances need to be treated separately. 
 6). Boiler, water heaters and other heating equipment when the water temperature exceeds 40 degrees centigrade. 
 2. The use of combined drainage situation: 
 1). The city has a sewage treatment plant and the domestic waste water is not needed to be reused. 
 2). Production wastewater and domestic sewage are similar in nature.

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