Chinese civilization of 5,000 years, from the Dayu rule the water, to the Yellow River by Emperor Han Wu Di, from the floods of 1998 to 2020 to meet the torrential rains, the great country, the land is vast, the Yellow River embedded in the north and south lying on the Yangtze River The size of the inner lake such as the vast starry sky set in the fertile land, to the west to the east, rushing past not only the long river of history, but also a magnificent era of China's water ecological civilization scroll.
Return to modern times, living in this land, we have to face the burden is no longer the flooding of rivers and lakes, the South-to-North Water Diversion of such a huge and unprecedented water project, but how to better manage "domestic sewage, industrial wastewater, early rainfall" in our existing "water environment".
Throughout the country's existing urban drainage model can be summarized as three: direct drainage system, interceptor system and rain sewage diversion system. (As the name suggests direct drainage system, is the most primitive drainage model, that is, domestic sewage and rainwater through a pipe directly into the natural water bodies, resulting in the consequences of pollution can be imagined). Interception of combined flow system in this issue to optimize the construction, that is, in the original direct discharge combined flow system of the pipeline on the installation of additional interceptor wells, the sewage will be intercepted to the sewage treatment plant to meet the standards of treatment and then discharged into the natural water bodies in the hope that this way to reduce the entry of sewage into the natural water bodies. But does it really work? Although the interception and combined flow system can solve the problem of sewage not entering natural water bodies on some sunny days, it cannot solve the problem on rainy days. Rainfall overflow pollution is serious, relatively clean rainwater and a large number of late into the sewage treatment system to increase the pipeline, sewage treatment plant load, and finally there will be sewage overflow and overflow pollution problems, that is, the eighties and nineties of the common old city stains, urban flooding problems, this "upgrade" or can not achieve the goal of water management. The third type of drainage system "rain sewage diversion system" is the construction of sewage pipes and rainwater pipes, hope that sewage sewage pipe through the sewage treatment system, treatment standards into the natural water bodies. And relatively clean rainwater into the rainwater pipe directly into the natural water bodies, without increasing the load on the sewage treatment system. "Each do their own", "each in their own way" is the original idea of this system, but in the actual construction (in the original combined system of pipeline area remodeling or construction), met a new problem: misconnections mixed connection. In the dense underground pipe network system, there are many cases of misconnections. Sewage pipes are wrongly connected to rainwater pipes, resulting in sewage being discharged directly into natural water bodies, while rainwater pipes are mixed up with sewage pipes, increasing the load on the sewage treatment system, and the same overflow pollution, sewage overflow and other problems will occur.
In addition to the problem of misconnection and mixing, there is also the problem of surface pollution. Pollutants generated by industries such as vegetable markets, car washes and refuse collection points within urban centers adhere to the ground, and once it rains, they enter storm drains with rainwater and are discharged into natural bodies of water, resulting in the pollution of natural bodies of water.
From the 1950s, when the discipline of "water conservancy engineering" was established, the efforts of several generations of water managers over the past half century have laid the foundation for a modernized theoretical approach to water management based on scientific research and development as a guiding principle. Wuhan Shengyu Drainage Systems Co., Ltd. has been involved in the Three Gorges Project since 1998, and after three years of precipitation in the West, and after years of research by a number of academicians and experts, and the research and development of a 100-member team of top researchers, the company has revolutionized the urban water management system by combining it with the actual situation of Chinese cities to propose a proven system that is suitable for China's national conditions. --Clean sewage diversion.
"Clean sewage diversion" governance system includes the outfall clean sewage diversion renovation, diversion system clean sewage diversion renovation, combined system clean sewage diversion renovation, clean sewage diversion renovation of industrial area system, in situ water ecological construction, source network plant river (lake) integrated intelligent operation and maintenance "six engineering modules", we are itemized by item. Module", we analyze one by one:
The governance of the outlet, the outlet is the key point of the catchment area, the jargon says "pollution in the water, the root causes in the bank, the key in the outlet, the core in the pipe network". We can imagine the city's underground drainage network into a funnel shape, the upper end of all kinds of new and old living settlements, industrial areas, the initial dirty rainwater collection area, etc., more points, different situations, the problem is intricate, but they all have a **** the same path that is to be discharged into the natural water through the mouth of the water. And the management of these fragmented, complex "front-end" problem compared to the first management of the "back-end" outfall this point is not a wise strategy, so the management of the outfall is the first step of urban watershed-level water environment management! Usually, the outlet through the clean sewage diversion advanced, in line with local conditions of the construction or renovation of facilities and equipment can be solved about 70% of the pollutants into the natural water body problem. It is also possible to achieve rapid removal of black odor. But want a thorough and long-lasting solution to the problem, just remodeling the outfall is not enough.
The source treatment is to further solve the problem of pollutants entering the natural water body, and the source pipe network (diversion area + combined flow area) must also be renovated and constructed. Sheng Yu also has its own system for the renovation work at the source! In the diversion system, the pipeline network is modified to achieve precise interception of sewage, and in the combined system, staggered rainwater and sewage diversion techniques are used to address overflow pollution. Precise interception of sewage discharge from factories and at the same time play a role in monitoring and control. Completion of the above engineering modules can be resolved after more than 90% of the pollutants discharged into the natural water bodies, then the rest of the pollutants flowing into the natural water bodies can be resolved through the restoration of in situ water ecology project construction. "Three points of treatment, seven points of maintenance" in order to protect the achievements of water environment management, long-term clear need "source network plant river (lake)" integrated intelligent operation and maintenance platform, based on the Internet of Things and big data technology to build "the status quo can be monitored, Equipment can be controlled, the results can be visualized, data can be calculated, history can be traced, "a full range of intelligent operation and maintenance platform, and ultimately realize the city's water ecological civilization, but also the water of the clear, create a thousand years of blessings.