Promote the utilization of sewage resources to solve the three major water problems of water shortage, water environmental pollution and water ecological damage

Ningbo Beilun Yandong Taxation Co., Ltd. is mainly responsible for the collection, treatment, recycling and urban drainage of sewage in Beilun, Ningbo. Since its establishment, the company has been committed to the innovation and exploration of green development and has obtained effective experience. In this regard, Bao Zhengcao introduced: "First, the market-oriented practice of sewage resource utilization, the development of the city's second water source; The second is to innovate technology and expand space land resources; The third is to implement photovoltaic power generation projects to help reduce carbon emissions."

In Xi 'an City, Shaanxi Province, the utilization of sewage resources has achieved certain results, and the ecological benefits, economic benefits and social benefits have been greatly improved, and a new pattern of urban water system has initially formed, namely, Chanba Guangyun Pool in the east, Kunming Pool Feng River in the west, Tangcheng Qujiang Pool in the south, Weiyang Seoul Lake in the north, and moat of Ming and Qing Dynasties in the middle.

Xing Xin, director of Xi 'an Development and Reform Commission, said, "Up to now, Xi 'an has built 32 sewage treatment plants with a daily treatment capacity of 3.481 million cubic meters; 27 sewage treatment plants have been put into operation, with a daily treatment capacity of 3.301 million cubic meters, of which the city 9 district has a daily treatment capacity of 3.145 million cubic meters, and the county county has a daily treatment capacity of 156,000 cubic meters. In 2021, Xi 'an plans to build or expand six sewage treatment plants, with an additional daily treatment capacity of 215,000 cubic meters; The effluent quality of the sewage treatment plant has reached the surface quasi-Class IV standard. 200 kilometers of pipe network were laid, 92 reclaimed water intake hydrants were set up, and the amount of reclaimed water conservancy in the urban area was nearly 200 million cubic meters, with a utilization rate of 26.5%."

Zhou Jianchi, deputy director of Chongqing Municipal Development and Reform Commission, introduced the development of Chongqing sewage resource utilization from three aspects: "System planning, four water co-treatment, Chongqing water environment quality continuous improvement; Urban sewage treatment capacity has been improved in an all-round way. According to local conditions and precise policies, urban sewage resource utilization has walked out of the road of characteristics."

Implement the concept of "water saving means pollution control" and promote the construction of a water-saving society

For the next step, how should various regions and departments implement and promote the utilization of sewage resources, Su Wei stressed that the first is to make overall planning and promote the system. We should promptly organize the formulation of relevant plans or implementation plans, promptly formulate specific plans, and clarify work tasks. It is necessary to promote the construction, operation and management of "plant and network integration" and promote "mud-water co-governance". Second, adopt policies according to local conditions. According to the local natural conditions, resource endowments and water environmental protection requirements, scientific utilization of sewage resources should be carried out. Key river basins, water shortage areas and water environment sensitive areas should scientifically implement upgrading of sewage treatment standards, and build sewage resource utilization facilities according to actual needs. The third is to implement the concept of "water saving means pollution control" and promote the construction of a water-saving society. We will promptly formulate and introduce local plans for building a water-saving society, thoroughly implement national actions to conserve water, and coordinate efforts to conserve water, control pollution, and utilize resources.

Various regions have also developed specific measures for future work. In the "14th Five-Year Plan" period, Beijing will achieve carbon reduction synergies as the overall starting point to promote economic and social development of comprehensive green transformation, in the specific work measures, one is in the field of sewage treatment and resource utilization to take the lead in promoting carbon peak, carbon neutrality, give full play to the advantages of high heat value of sewage and recycled water, pilot to carry out waste heat utilization, Simultaneous exploration of sludge energy utilization. The second is to further strengthen the ecological application of recycled water, based on the basic fact of the shortage of water resources in the capital, further increase the research on recycled water purification technology, use ecological ways to treat and utilize recycled water, and further return recycled water to natural circulation. The third is to further improve the reclaimed water pipe network in the central urban area in combination with urban renewal, constantly expand the scope of reclaimed water supply, and replace fresh water.