Liaoning Huludao is a newly emerging coastal city and an important part of Liaoning's coastal economic belt. As the process of urbanization further accelerates and the size of the city continues to expand, environmental issues have drawn increasing attention. Protecting and improving the marine environment, preventing pollution damage and maintaining ecological balance are of great significance for promoting the sustainable economic and social development of the city. In 2016, the theme of China Environmental Protection Century Bank's campaign in Huludao was "Implementing the Bihai Initiative and Protecting the Marine Ecology." The Environmental Protection Century Report Team focused on reviewing the production and domestic sewage treatment and discharge in various places and inspected the utilization of marine resources in the city as well as the comprehensive improvement project of marine ecological environment. Among the major pollution sources that affect the marine environment, the largest and the largest amount of terrestrial pollutants have the most impact on the marine environment, especially in the enclosed and semi-enclosed areas. Bohai Liaodong Bay, south of the city, has 261 kilometers of coastline, the river into the sea and the general sewage outfalls can be land-based pollutants directly into the Bohai Sea. Therefore, the city's production, sewage treatment and discharge standards, it is particularly important. Construction of sewage treatment works In order to realize the "Blue Sea Action" and improve the ecological environment, since 2000, the city has implemented 100,000 tons / day sewage treatment project construction in accordance with the principle of "overall planning, step-by-step implementation and proper advancement". The project by the new, old sewage treatment plant and supporting pipe network components. Among them, the new district sewage treatment plant is located in the western section of Longji District Road, Qi, with a handling capacity of 30,000 tons / day, the use of SBR treatment process, started construction in May 2001, completed and put into use in August 2003, the main collection Handle domestic sewage of residents in the Qian Shan River Basin and the Longwan waterfront. The old district sewage treatment plant is located in Longgang District, the eastern side of rice pond village, processing capacity of 70,000 tons / day, the same SBR treatment process, started construction in May 2003, completed and put into use in October 2004, the main collection and processing five Lihe, Lianshan River and Longgang District residents living sewage. The completion of the two WWTPs ended the history of the municipal sewage directly discharging into the sea. As soon as possible, it is of great significance to eliminate and control the pollution of the sewage discharge to the city and the surrounding coastal environment as soon as possible, and to reduce the pollutants in the rivers of Tienshan, Lianshan and Wulihe Of the emissions played a positive role. At the same time, the comprehensive management of the water system in the mountains, the Lianshan River and the Wulihe River has made a positive contribution to improving the urban ecological environment and the quality of the offshore waters in the Bohai Bay. Sewage treatment plant standard transformation Urban sewage treatment facilities are not only one of the important contents of urban environment construction, but also an indispensable important infrastructure for urban and social development and play a crucial role in urban environmental protection. With the continuous expansion of the scale of urban development and national standards for sewage treatment to improve the city's existing sewage treatment scale, technology and pipe network can no longer meet the collection requirements. To address the city's sewage treatment problems, increase water pollution control efforts to achieve zero discharge of urban sewage exceeded the target, the municipal government to use financing for all funds, the original two sewage treatment plants were upgraded and Expansion and focus on the future development of the city, supporting the construction of a sewage interception pipe network project to completely solve the problem of sewage collection and management capacity and urban development is not coordinated. In October 2012, the city took the lead in completing the project of upgrading the sewage treatment plant in the province. The water quality of the new and old urban sewage treatment plants was upgraded from the secondary emission standard to the first-level A standard. After the successful implementation of this project, more than 4,000 tons of various pollutants can be reduced every year, which is beneficial to further improve the water environment quality in the city and Liaodong Bay in the Bohai Sea. It can also provide high-quality reclaimed water for users of water and ease the water resources in the city Tense situation, to achieve the recycling of urban sewage. In October 2015, the 50,000t / d expansion project of the old district sewage treatment plant was successfully completed and the processing capacity was increased to 120,000t / d. At present, the total size of domestic sewage treatment in the city reaches 150,000 tons / day, and 71 kilometers of sewage interception pipe network are built. The collection and treatment rate of domestic sewage in the urban area reaches more than 90%. Water use has a bright future The city is one of 110 cities in the country that is seriously water-scarred, with per capita water resources accounting for one-third of the national average. With the economic development, the demand of water is increasing constantly, especially the gap of industrial water is very big. Implementation of sewage treatment, development and utilization of water resources is an inevitable path. When the two WWTPs in the city were completed, they signed a water supply agreement with Huludao Zinc Plant to recycle the water. At present, the cumulative supply of more than 2800 million tons of water, mainly for the plant cooling, spraying, dregs and other production processes. Before the recycling of wastewater, Huludao Zinc Plant mainly used the surface water of Wujintang Reservoir, which not only caused high cost of water, but also formed a situation of contending with residential water, resulting in the waste of fresh water resources. With the improvement of the level of sewage treatment technology in the city, the field of reclamation and reuse of sewage has also been continuously expanded. The water quality after the rebuilding and standardization has reached the relevant requirements of water quality of the landscape environment of the national urban sewage reclamation and utilization and can be widely applied to landscaping, road sweeping and landscape water supply. At present, the sewage treatment plant supplies 15,000 tons of reclaimed water to the artificial lake in Longwan Park every day. With a bright future in water utilization, the municipal wastewater treatment company has already signed an agreement on water supply intent with many users such as Datang Thermal Power Plant, Longwan Central Business District, Guodian Huludao Thermal Heat Co., Ltd. and Beigang Industrial Park. The effective use of reclaimed water will further ease the pressure on the city's shortage of fresh water resources and bring greater economic and social benefits. Jigging Machine,Electric Jigging Machine,Jigging Machine Separator,Gold Ore Jigging Machine henan ascend machinery , https://www.ascendminingcrush.com