With the development of social economy and the acceleration of urbanization, the problem of water pollution has become increasingly serious, which has become one of the important factors restricting sustainable development. Facing the grim situation, our government attaches great importance to water environmental protection, continuously increases investment, promotes technological innovation, and actively explores sewage treatment modes suitable for national conditions, and has made a series of remarkable achievements.

In recent years, the pace of construction and renovation of sewage treatment facilities across the country has been significantly accelerated, and the treatment capacity has been greatly improved. A modern urban sewage collection and treatment system covering urban and rural areas, with reasonable layout, advanced facilities and standardized management has basically been formed. According to statistics, in 2019, the national urban sewage treatment rate reached 96%, and rural areas reached more than 70%. These figures represent that the living environment of countless families has been improved, and the water quality of many rivers and lakes has been restored or improved.

In terms of technology, international advanced technologies such as new high-efficiency biofilm reactor and anaerobic ammonia oxidation process are widely used, which improves the effluent standard and reduces the energy consumption cost; At the same time, the utilization of sludge as a resource has become a new bright spot. By means of pyrolysis, gasification and dry incineration, sludge is converted into energy or fertilizer, which realizes the purpose of turning waste into treasure and is of great significance for reducing greenhouse gas emissions.

In addition, with the enhancement of public awareness of environmental protection and the continuous improvement of laws and regulations, all kinds of enterprises have responded to the call and intensified the advanced purification treatment of their own wastewater, striving to meet or even exceed the requirements of national standards, forming a good industry demonstration effect. At the same time, all sectors of society actively participate in water resources protection activities, such as the implementation of "river length system" and "lake length system", which greatly mobilized all sectors of society to participate in water body management and greatly promoted the development of water resources management and ecological restoration.

To sum up, under the leadership of the government, relying on scientific and technological progress and social joint efforts, China's sewage treatment industry has made great progress, which not only provides cleaner and safer water conditions for the people, but also plays an important role in promoting the construction of ecological civilization and realizing green and low-carbon transformation. future, we will continue to uphold the concept of "Lucid waters and lush mountains are invaluable assets", constantly optimize and upgrade existing facilities and technical means, and strive to make every river reproduce the beautiful sight of crystal clear.