Continue to promote the quality and efficiency of sewage treatment and work together to win the battle of green water protection

First, the time to improve the quality and efficiency of urban sewage treatment is ripe, and it needs to be paid great attention to and tackled systematically. First, we need to raise awareness and increase input. It is necessary to stand on the strategic height of promoting the construction of ecological civilization, promoting the work of carbon peak carbon neutrality, and promoting the transformation of green and low-carbon development mode, with greater determination and investment, speed up the shortcomings of urban sewage treatment, and fundamentally eliminate the basic obstacles restricting China's economic and social development, especially urban development. The current opportunity is ripe, and we should attach great importance to and increase investment. Second, we need to make up for weaknesses systematically and with high standards. It is not only necessary to comprehensively consider the problem of sewage collection, treatment and recycling, but also to consider all pipelines and other facilities entering the underground, unified planning and package solution; It is necessary to proceed from the long-term interests of the country and the people, with a high starting point, high standards, and advanced planning and construction. Third, we must strictly implement the construction timing and consolidate local responsibilities. Whether it is real estate development or industrial projects, it is necessary to do the sewage treatment plant network first, and urge the government to move forward with sewage treatment facilities. Not only should the "three-year action" achieve practical results, but also promote this work to be further advanced during the "14th Five-Year Plan" period.

Second, the focus of promoting the quality and efficiency of urban sewage treatment should be clear, and it is necessary to pay equal attention to construction and maintenance, and take into account the utilization of resources. First, we will strengthen surveys and surveys. Figure out the urban drainage pipe network connection, drainage households and outlet distribution, drainage volume and water quality characteristics, industrial enterprises drainage destination and water quality conditions, and establish a municipal drainage pipe network geographic information system. Second, we will strengthen the construction, renovation and maintenance of facilities. Strengthen the construction of sewage and sludge treatment plants, reclaimed water utilization plants and other facilities; Strengthen the "blank area" of drainage pipe network, especially the construction of pipe network in urban villages, old and old urban areas, and urban and rural areas; Strengthen the maintenance and renovation of the supporting pipe network defects of each sewage treatment facility; Carry out periodic inspection and maintenance of pipe network. Third, we will control the source of industrial sewage. The construction of industrial parks should ensure the single and orderly discharge of relevant pollutants. Fourth, promote the resource utilization of sewage sludge. Vigorously promote the resource utilization of urban domestic sewage treatment. We will introduce incentive policies and targeted subsidies for enterprises using reclaimed water. Explore the resource utilization of sludge, and introduce the utilization standards of sludge terminal products.

Third, to establish a long-term mechanism to promote the quality and efficiency of urban sewage treatment, it is necessary to improve the policy system and crack the market problems. First, we will improve the legal system. Strengthen the implementation of the Law on Water Pollution Prevention and Control and the Regulations on Urban Drainage and Sewage Treatment, and clarify the penalties for failing to plan and build centralized industrial sewage treatment facilities in industrial agglomeration areas and failing to prioritize the construction of drainage and sewage treatment facilities in the development and construction of new urban areas. We will innovate the drainage management mechanism, vigorously implement the management of "factory-network-river (lake) integration", and pilot the integration reform of "supply and discharge and clean control". Change the separate management model, and promote the transformation of drainage management to fine. Second, establish normative and scientific standards. Formulate differentiated discharge standards that match the water functional areas, the level of regional economic development, and the destination of sewage recycling. Clear the overflow pollution control standard of combined flow control in rainy season. As soon as possible to adjust the industrial parks and industrial sewage treatment and discharge standards. Third, explore market-based models. We will carry out trials of cost accounting for the whole process of sewage collection and treatment in major cities, and expand the trials and gradually promote them in large and medium-sized cities where conditions permit. We will give full play to the backbone role of state-owned enterprises and introduce market mechanisms. Revitalize existing pipeline network assets. We will encourage the packaging of projects with stable returns such as water supply and sewage treatment with input projects such as pipeline network construction and operation, and attract the participation of social capital. Fourth, we will strengthen scientific and technological support and personnel training. Strengthen the application of new technologies, and realize the dynamic update of drainage system, intelligent operation, diagnosis and evaluation, and departmental collaboration. Strengthen research and development of new technologies, new materials and new equipment for underground pipe networks. Fully tap the energy and resources contained in sewage and sludge. We will strengthen the training of professional and technical personnel at all levels in the field of underground pipe network safety protection. Construction of underground pipeline safety protection field training base.

The Population, Resources and Environment Committee of the NPC organized a research team to go to Henan and Sichuan for field research and found that due to the unclear bottom of the pipeline network, long-term lag in construction, and prominent problems of facility shortboards and debts, there are still many problems in implementing the new development concept, building a long-term guarantee mechanism, formulating standards and scientific and technological support.

 To this end, it is recommended that:

First, improve ideological understanding and enhance action consciousness. 

Second, we need to get a full picture of the situation and make up for weaknesses. Concentrate on finding out the bottom number of urban sewage pipe networks and other facilities, master the total number of pipe networks, the distribution of blank areas, and the number of mixed wrong connections, missed connections, and old and damaged pipe networks that need to be updated and repaired, and make up all kinds of shortcomings as soon as possible. Combined with urban renewal and new urban infrastructure construction, actively promote the construction of intelligent dynamic drainage information system, and improve the efficiency of sewage collection and treatment facilities.

Third, formulate standards scientifically and innovate management mechanisms. Differentiated sewage treatment standards should be formulated to match the water functional areas, regional economic development levels, and sewage recycling destinations. We will formulate scientific guidelines on pollution control standards for combined flow control and overflow during the rainy season, and adjust the treatment and discharge standards for industrial parks and industrial sewage. Further promote the integrated operation of the plant network and river (lake), pilot the integration reform of "supply and discharge and clean governance", and achieve the integration of project investment, construction, management and transportation, and intensive and large-scale facility operation and maintenance.

Fourth, improve the pricing system and introduce market mechanisms. Implement the dynamic adjustment mechanism for sewage treatment fees, and bring the operation and maintenance costs of sewage pipe networks into the coverage of sewage treatment fees. Guide the adjustment of the business direction of central and state-owned enterprises in some competitive industries, and shift to urban sewage treatment and other public facilities industries. Innovate the business model, introduce the market mechanism through the capitalization of assets, and attract social capital to participate in the construction.

E Jingping, member of the 19th Central Committee of the Communist Party of China, Deputy director of the Committee of Population, Resources and Environment of the CPPCC National Committee, former Minister of Water Resources: Comprehensively improve the standard system to clarify the target responsibility

For the improvement of the quality and efficiency of urban sewage treatment, it should be closely focused on: sewage collection, reasonable determination of sewage treatment capacity, to ensure the benign operation of sewage treatment plants and recycled water plants, the three main points, seize the key point, and focus on the work.

At present, all localities are actively carrying out relevant work in these three aspects, and there are achievements and improvements. But overall there are still unsatisfactory, the main problems are: sewage collection rate is not high, rain and pollution mixed wrong connection, pipeline leakage and so on are common; The problem of insufficient and excessive sewage treatment capacity exists at the same time. The proportion of problems that sewage plants and recycled water plants can not run well is too high. To this end, it is recommended that:

First, comprehensively improve norms, standards and systems. First of all, it is said that the three aspects of clean sewage collection, treatment and benign operation are done to what is done. To do this well is both necessary and urgent, problem-oriented and fundamental.

2. Define specific goals and tasks. 

Third, specific responsibility. The key of urban sewage treatment is to strengthen the responsibility system. It is suggested that from the central government to the local government, from the government to the department, from the public institution to the enterprise, to comprehensively clarify the responsibility and clarify the main body of responsibility. At the same time, the establishment of relevant operational mechanisms for the landing of responsibilities.

Wang Fuming, member of the National Committee of the Chinese People's Political Consultative Conference, Dean of the School of Civil Engineering of Sun Yat-sen University, Academician of the Chinese Academy of Engineering: Accelerate the improvement of scientific and technological innovation and talent training capacity of underground pipe network

The scale of underground pipelines in Chinese cities is huge and the disrepair is widespread. In recent years, scientific and technological innovation in the construction and maintenance of underground pipelines has gradually received extensive attention from the state and local governments, and technical problems such as full-load pipeline detection, rapid desilting of small-caliber pipelines, loose soil outside the pipelines and diagnosis and treatment of hidden diseases of cavitation need to be solved, and the problems of insufficient scientific and technological innovation ability and lack of senior specialized talents have become increasingly prominent. To this end, it is recommended that:

First, accelerate the layout and construction of a national underground pipe network scientific and technological innovation platform. It is suggested to accelerate the layout and construction of the State Key Laboratory for Disaster Prevention and Control of Underground pipelines and the National technological innovation center for underground pipeline networks.

The second is to strengthen the training of underground pipeline professional and technical personnel. In response to the urgent need for professional and technical personnel in the construction and maintenance of urban underground pipeline, relying on relevant universities and vocational and technical colleges, the establishment of underground pipeline majors or directions, the construction of underground pipeline teacher training and practical training bases, the acceleration of the training of underground pipeline professionals at all levels, and the overall improvement of the professional and technical level of underground pipeline practitioners.

The third is to establish a national underground pipeline disease diagnosis team. It is suggested to organize national well-known experts and technical teams to carry out centralized consultation on the drainage pipe network test results, classified diagnosis and treatment, symptomatic treatment, and comprehensively improve the technical level of diagnosis and treatment of drainage pipe network diseases.

Wang Meihua, member of the CPPCC National Committee and deputy chief engineer of Shanghai Construction Engineering Group Co., LTD. : Promote the construction of smart water integration

In view of the current problems such as low centralized collection rate of urban sewage, insufficient efficiency of pollutant reduction, and unclear number of sewage network facilities, some urban water departments are carrying out online monitoring of sewage network facilities and construction of business management information systems. However, there is still a big gap in the top-level design, data application, technical support, capital investment and talent reserve of smart water integration construction. To this end, it is recommended that:

First, strengthen the top-level design to ensure the effective implementation of smart water construction. First, combine the construction of network China and digital China, incorporate the connotation of smart water construction into smart city planning, and try first in cities with better basic conditions. The second is to study and formulate special plans for smart water, implement the main bodies of responsibility, clarify the construction direction, overall framework and promotion strategy, and plan the construction tasks and scope. The third is to strengthen the urban smart water construction standard system, and unify the construction content and data interface.

Second, improve infrastructure and strengthen the application of water data. First, cities that set up municipal districts should combine smart city construction and concentrate on improving network systems and smart perception and monitoring systems for water infrastructure. Second, cities at or above the county level should speed up the construction of water data centers that integrate geographic information data, monitoring data and business data, and improve the construction of information service application systems in the water industry. Third, clarify the exchange mechanism of external information sharing.

Third, strengthen technical support and promote the construction of smart water functional platforms. First, implement intelligent linkage and dynamic update of water system data, and establish methods and mechanisms for verifying the quality of geographic information system (GIS) data and monitoring data. The second is to strengthen the research and development and application of key monitoring equipment such as drainage facility flow, and promote the development and application of commercial drainage model software. Third, improve water information data protection technology, strengthen data encryption and other security technology research.

Fourth, expand financial channels to ensure the sustainable development of smart water integration construction. Governments at all levels should continue to increase financial budget support on the basis of innovative investment and financing mechanisms, and actively expand the funding channels for smart water construction.

5. Implement the talent strategy to consolidate the talent base for smart water construction. Colleges and universities should strengthen the general education of information technology in water-related majors during the undergraduate period, set up the professional direction of smart water affairs during the graduate period, promote the integration of industry and education in various forms, and cooperation between schools and enterprises, and cultivate smart water construction talents who meet the needs.

In most areas of China, industrial wastewater and industrial park sewage are generally discharged into urban sewage network after proper pretreatment, and discharged after combined treatment with urban domestic sewage. But at present, there are still some problems and risks:

First, the pollutant composition of different industrial wastewater is very different and the concentration is high, when they are discharged into the urban sewage network time is uncertain, it is easy to cause the imbalance of carbon, nitrogen, phosphorus and other substances in the biochemical system of the urban sewage treatment plant, thus significantly reducing the treatment efficiency.

Second, some industrial wastewater may contain dangerous chemicals, persistent pollutants, pathogenic microorganisms, which may be discharged into the surface water through urban sewage treatment plants.

Third, a small number of illegal enterprises will be untreated waste water directly into the urban pipe network phenomenon occurs.

After the necessary pretreatment, the wastewater from industrial and industrial parks is integrated into the urban pipe network for unified treatment, which is the best plan at present, but it needs to be strengthened in management, technology and standard support. To this end, it is recommended that:

First, the local environmental protection department takes the lead, do a good job of industrial wastewater access to urban sewage investigation, specify the list of industries that clearly encourage and prohibit access, and determine the evaluation procedures and access standards. For those that are determined to be unable to access, they should be withdrawn within a prescribed time limit according to law, and accurately monitored and strictly "one enterprise and one tube".

(2) For those that can be accessed after assessment, the local environmental protection department shall take the lead to establish a standardized collaborative operation mechanism between wastewater discharge enterprises and urban sewage treatment plants. Reasonable planning and strict implementation of different industrial wastewater discharge time period, so that urban sewage treatment plants can maximize the use and balance of nutrient sources, and promote the quality and efficiency of urban sewage treatment.

Third, from the perspective of easy operation and easy implementation, it is more reasonable to use COD and comprehensive ecotoxicity (luminescent bacteria method) to evaluate the conditions of sodium mesh. For industrial wastewater qualified for multiple comprehensive eco-toxicity tests, the number of tests can be relaxed.

When urban sewage treatment plants submit operating cost information to the competent authorities in accordance with regulations, they can include the costs for technological transformation, intelligence introduction, management and detection level improvement, so as to appropriately improve their profitability level, so that they have the ability to constantly update sewage treatment technology and improve the level of intelligent response to risks.

Resource water shortage and quality water shortage coexist in China. Reclaimed water is of great significance to replace conventional water resources because of its stable source. However, nationwide, there are still problems such as low utilization rate of urban recycled water, insufficient sludge treatment capacity and low utilization rate of resources. It is found that the bottleneck of municipal sewage sludge resource utilization is mainly due to the lack of power of local governments and the imperfect relevant system and mechanism. To this end, it is recommended that:

First, strictly incorporate recycled water into the unified allocation of regional water resources. Governments at all levels are urged to formulate water resources allocation plans, take recycled water into account, formulate local standards that are compatible with the situation of local water resources, and introduce corresponding management measures, so that recycled water can effectively enter the government's decision-making vision, and thus accelerate the use of recycled water.

Second, improve the allocation system for the diversified utilization of recycled water. First, according to the recycled water utilization plan, the site selection and scale of the construction of urban sewage treatment plants will be re-determined according to the principle of local reuse and utilization. The second is to improve the construction of recycled water transmission and distribution network and utilization facilities, explore the inclusion of recycled water pipeline network in the overall planning of urban underground pipeline network, and increase the investment subsidy of the central budget for the construction of recycled water projects. The third is to formulate recycled water standards according to local conditions and reduce unnecessary deep treatment processes.