1. Project background Hehe Town Sewage Plant is located in Hehe Town, Binzhou City, Shandong Province, with a sewage treatment capacity of 3,000 tons per day. Construction unit Shandong Narui Environmental Protection Technology Co., Ltd. 2. Sewage from the process flow enters the coarse grid from the external pipeline, and enters the fine grid through the lifting pump after first-level screening. After being screened by a fine grid, the sewage enters the cyclone grit sink, and after aeration and sand-water separation, the sewage enters the homogeneous tank. The sewage in the homogenization tank is fully mixed by the push pump and then enters the anaerobic tank, anoxic tank and aerobic tank in sequence, and finally enters the secondary grit tank. The effluent from the secondary sedimentation tank enters the flocculation sedimentation tank, and PAC and PAM are added to the tank for flocculation

With the rapid economic development of Zhanjiang City and the rapid growth of water demand, the groundwater source water plants in Xiashan District and the development zone have been unable to meet the needs of economic development. In order to fundamentally reverse the situation of long-term massive groundwater extraction in the urban area and ensure the water supply and quality of the urban water supply, the city government decided to restart the Xiashan 500,000 cubic meter / day water plant project. The total construction scale of the first phase of the water supply project in Zhanjiang is 500,000 cubic meters per day. It is implemented in two phases. The first phase is 250,000 cubic meters per day. Water supply business