Water Quality improvement in the center of Hengshui Lake, Hebei (Lake)

详细说明

1.Project overview

       Hengshui Lake, located in Hengshui City, is the only route for the middle route of the South-to-North Water Diversion project. It is also the only nature reserve in the North China Plain that maintains intact wetland ecosystems such as marshes, waters, tidal flats, meadows and forests.

2.Sources of pollution

       The eutrophication and pollution of water body are serious due to the slow water flow speed and long water body renewal time. The overall water quality is good, but with a lot of non-point source pollution and water replenishment discharged into the water body in winter, there are still micro-pollution problems. The problems of permanganate index, total phosphorus and so on exceed the standard exist in hengshui Lake national examination section.

3.Governance objectives

        Total phosphorus index reach the surface water Ⅲ class (less than 0.05 mg/L).

4.Control measures

         Governance time: December 15, 2019 solstice March 15, 2020, a total of 3 months. 2 installation devices.

5.Governance effect

         Total phosphorus index reach the surface water Ⅲ (lake, library) (less than 0.05 mg/L).

Photo taken on Oct. 15, 2019 shows the center of Hengshui Lake

Summary table of partial data of water quality in the center of Great Lakes (daily mean value of online monitoring in September)

Water quality index curve

       In order to verify the water quality changes within the scope of the equipment, Hebei Huapu Environmental Testing Co., Ltd. was commissioned to conduct on-site sampling and testing at different distances from the equipment on March 16, 2020. The testing data showed that the water treatment effect within the effective radius of the equipment was significant. Test points 1, 2 and 4 are located within 500m of the operation of the equipment, while test points 3, 5 and 6 are located outside 500m of the operation of the equipment. The no. 1 test point is the section of the national examination in the center of the Lake. No. 2 detection point is the placement point of "equipment"; Detection point No. 4 is the placement point of "equipment"; Test point No. 5 is the entrance to the lake.

The above data are the results of the experiment after the separation by the third party hebei Huapu Environmental Testing Co., LTD