Mild ponding: the average depth of ponding in this section is equal to 15cm, the ponding time is 1h, and the ponding area is more than 50m2 and less than 300m2.
Sewage pumping station and pressure pipeline. In the pipeline system, it is often necessary to lift the sewage in the lower part, which requires the installation of pumping stations. The pumping station located in the middle of the pipeline system is called the midway pumping station, and the pumping station located at the end of the pipeline system is called the terminal pumping station. If the sewage behind the pumping station needs pressure transportation, a pressure pipeline should be set up.
Sewage treatment plant. Urban sewage treatment plant is an important part of urban construction and an indispensable public facility for urban production and people's life. The task of the treatment plant is to conscientiously implement the policy of serving production and people's lives.
Urban sewage drainage system:
Urban sewage drainage system usually refers to the drainage system that mainly collects and removes domestic sewage.
(1) Indoor drainage system and equipment. Indoor sanitary appliances (such as toilets, sewage pools, washbasins, etc.). ) and the drainage equipment in the production workshop play the role of collecting sewage and wastewater, which is the beginning of the whole drainage system. Domestic sewage and industrial wastewater flow into the sewage pipeline system of the block (factory, community or courtyard) through indoor sewage pipeline systems such as water seal pipes, branch pipes, vertical pipes, main pipes and outdoor pipes.
② Outdoor sewage drainage system. Outdoor sewage drainage system mainly includes block sewage drainage system and street sewage drainage system.
Baidu encyclopedia-urban drainage