"14th Five-Year Plan" urban sewage treatment and resource utilization Development planning

I. Planning basis and situation outlook：

Sewage collection, treatment and resource utilization facilities are the core of urban environmental infrastructure Composition is an important starting point for in-depth fighting against pollution prevention and control, and for improving urban people Living in the environment, promoting the modernization of urban governance system and governance capacity, and accelerating the construction of ecological civilization Promoting high-quality development plays an important role.Conscientiously implement the decisions and arrangements of the Party Central Committee and The State Council, and constantly increase urban sewage treatment facilities Construction and operation management, sewage collection and treatment capacity level significantly improved, completed "13th Five-Year Plan" national urban sewage treatment and recycling facilities construction planning "objectives. with We should also be clearly aware that the development of urban sewage collection and treatment in our country is unbalanced and inadequate Problems, weaknesses are still prominent. In particular, the construction and transformation of sewage pipe networks are lagging and dirty The utilization level of water resources is low, the harmless disposal of sludge is not standardized, and the facilities are sustainable There is still a gap between China's weak capacity and high-quality development.The 14th Five-Year Plan period was the first century of our endeavor to build a moderately prosperous society in all respects After fighting the goal, take advantage of the momentum to start a new phase of building a modern socialist country in an all-round way The first five years of marching toward the second centenary goal is to enter a new stage of development An important period to promote high-quality development. "Fourteenth Five-Year Plan" period, we should build high quality Urban sewage treatment system as the theme, from the incremental construction of the main system to improve the quality and efficiency Pay equal attention to structural adjustment and optimization, improve the stock, do the best increment, and systematically promote the urban sewage department Management facilities of high quality construction and operation and maintenance, effectively improve the quality of urban water ecological environment, We will continue to enhance people's sense of happiness, fulfillment and security.

Second, general requirements

(1) Guiding ideology

The spirit of the Fourth and Fifth Plenary Sessions of the CPC Central Committee should be based on the new development stage, implement the new development concept, and build The new development pattern, adhere to the system concept, to improve the quality of the water ecological environment as the goal, to Improve the efficiency of urban sewage collection and treatment, and focus on the strength and weakness of facilities Hand, overall planning, focus on key points, problem-oriented, classified policies, and accelerate the formation of the layout Reasonable, coordinated, safe, efficient, energy-saving and low-carbon urban sewage collection and treatment The new pattern of source utilization, to achieve high-quality development of sewage treatment, sustainable development, meet The people's growing need for a beautiful ecological environment.

(2) Basic principles

Planning leads, optimize the layout. Strengthen planning guidance and guidance, scientific determination of facilities。Scale and layout, promote river basin linkage, regional coordination, urban and rural overall planning, and achieve supply and demand。Constitutive phase equilibrium. We will make coordinated efforts to promote sewage treatment, improve black and odorous water bodies, and control waterlogging.Make up the short board, improve the efficiency. We will speed up the collection, treatment and recycling of urban sewage。Utilization and sludge disposal facilities short board, promote the full coverage of urban sewage network, upgrade facilities。Processing power. Promote the integration of plant and network, equal emphasis on mud and water, construction and management, and improve operation management To achieve stable and reliable operation of facilities and improve the overall efficiency of facilities.Adopt policies according to local conditions. Combine the local water resources endowment and water environment carrying capacity Capacity, development needs and economic and technical level and other factors, scientific establishment of facility capacity targets.

Choose the economical, energy-saving and low-carbon process route,Construction of sewage treatment facilities in different areas.Government led, market operation. Give play to the decisive role of the market in allocating resources So that the government can play its role. Clarify the main body of responsibility, strengthen the standard constraints, and strictly supervise the examination Core. Improve the price mechanism, increase financial input, attract private capital, and form sustainable development

The construction and operation mode.

(3) Main objectives

-- By 2025, the direct discharge and collection of domestic sewage in urban built-up areas will be basically eliminated Treatment facilities blank areas, the national urban domestic sewage centralized collection rate strive to reach 70% Up; City and county sewage treatment capacity basically meet the needs of economic and social development, county Sewage treatment rate reached 95% or above; The treatment of sewage in water environment sensitive areas has basically reached 1 Class A emission standard; The utilization rate of recycled water in water-scarce cities at the prefecture level and above has reached 25 percent Above, the Beijing-Tianjin-Hebei region reached more than 35%, and the middle and lower reaches of the Yellow River basin were short at prefecture level and above Water city strives to reach 30%; City and county sludge harmless, resource utilization level Further improvement, urban sludge harmless disposal rate reached more than 90%; Yangtze river economy Belt, the Yellow River basin, the Beijing-Tianjin-Hebei area of the town sewage collection and treatment capacity, sludge harmless The level of chemical disposal has been significantly ，improved.

-- By 2035, the urban domestic sewage collection network will be basically covered and urban pollution will be eliminated，Full coverage of water treatment capacity, comprehensive realization of harmless sludge disposal, sewage sludge resources，The utilization level has been significantly improved, and urban sewage has been treated safely and efficiently, and the green is shared by all Color, ecology, safe urban water ecological environment.Third, promote the construction of facilities

(1) Make up the short board of the urban sewage network and improve the collection efficiency

1. Construction tasks. New centralized sewage treatment facilities will be built in the area

Sewage collection network to ensure effective collection of sewage. We will speed up the construction of villages and old cities in cities，Domestic sewage collection pipes in districts, towns, urban and rural fringe areas and resettlement areas for poverty alleviation in inhospitable areas Network to fill the blank area of sewage collection network. New residential communities should be planned and constructed simultaneously，Sewage collection pipe network, promote the construction of branch pipe network and outbound pipe connection. Carry out old and broken Diagnosis and repair of sewage pipe network and rain-sewage combined system pipe network that damage and easily cause waterlogging，Update, step by step to promote the pipe network misconnection, mixed connection and leakage transformation, improve the efficiency of sewage collection. big We will implement the renovation and renewal of sewage pipe networks in cities and counties along the main stream of the Yangtze River at the prefecture level and above。Cities have basically solved the problem of mixing and misconnecting municipal sewage networks, and basically eliminated domestic sewage Row. Diversion of rain and pollution shall be carried out in light of local conditions, and measures shall be taken if conditions are not available for the time being Reduce the overflow pollution in rainy season. During the "14th Five-Year Plan" period, new and reformed sewage collection pipe network8 Ten thousand kilometers.

2. Technical requirements.

About sewage network checks. Comprehensive investigation of sewage pipe networks, rain and sewage combined pipe networks，Facility functions and operating conditions, misconnection, misconnection, misconnection and user access, etc., to find out the pollution。The bottom of the water pipe network, clarify the problem of sewage collection facilities. Based on geographic information system, etc。Periodic inspection and evaluation system. Urban people's governments organize residential communities, enterprises and institutions。The ownership units, property management units and their competent departments (units) carry out internal pollution，Water pipe network investigation, and carry out remediation.Construction and renovation of sewage pipe network. New sewage collection pipe, except in arid areas The network should adopt a split system. The shunt drainage system periodically carries out misconnection and mixed leakage。It is easy to inspect and transform the urban waterlogging pipe network and promote the diagnosis of pipe network diseases，And repair, strengthen the sewage collection network external water infiltration flow, backfilling investigation and treatment. steady

We will move forward with the diversion of rain and pollution, and give priority to the implementation of source drainage in residential communities, enterprises and public institutions Renovation of water pipe network. We will prudently carry out rain and pollution diversion in old urban areas in arid and semi-arid areas One size does not fit all.

On the treatment of direct discharge of domestic sewage. To carry out direct discharge of domestic sewage source tracing treatment in dry weather Reason. The capacity of the subsequent sewerage system needs to be considered before terminal interception measures are taken，And the treatment capacity of downstream wastewater treatment plants. Construction dewatering and foundation pit drainage to ensure standards Discharge, avoid water discharge into the sewage collection system, crowding out the sewage collection and treatment space, increase Increase energy consumption.

About the systematic renovation of the area. Biochemical oxygen demand (BOD) of inlet water from municipal sewage treatment plant，If the concentration of (BOD) is less than 100 mg/L, the system should be investigated around the service area pipe network，The causes of low intake concentration, scientific determination of water quality improvement objectives, the development and implementation of "a plant。The "One policy" systematic treatment plan steadily improves the efficiency of sewage collection and treatment facilities.On pollution control of combined flow control. The combined drainage area adopts the source according to local conditions Reconstruction, overflow port reconstruction, interception well reconstruction, damage repair, pipe replacement, additional adjustment Engineering measures such as storage facilities and diversion transformation of rain and pollution can reduce the overflow pollution of the combined pipe network in rainy season Improve rainwater discharge capacity and reduce the risk of urban waterlogging.

About pipe network construction quality control. Strengthen the whole process of pipe network construction quality control, The material should be durable and applicable, the pipeline foundation should be supported, the pipeline interface should be tight, and the trench backfill should be Tightness, tightness check should be standardized. Speed up the elimination of brick Wells, promote concrete cast-in-place or Finished product inspection Wells, promoting ductile iron pipe, socket rubber ring interface reinforced concrete pipe, etc Pipes.

(2) Strengthen the weak points of urban sewage treatment facilities and improve treatment capacity

1. Construction tasks. Cities and counties where existing sewage treatment capacity cannot meet demand,We will speed up efforts to fill gaps in processing capacity. The new urban area should promote sewage collection synchronously with urban development，Construction of collective processing facilities. The construction scale of sewage treatment facilities in large and medium-sized cities can be appropriately exceeded Before. Beijing-tianjin-hebei, Yangtze River Delta, Guangdong-Hong Kong-Macao Greater Bay Area, along the South-to-North Water Diversion Project, the Yangtze River，Economic belt cities and counties, cities along the main stream of the Yellow River to achieve centralized treatment of domestic sewage，Full force coverage. Overall planning, orderly construction, and steady promotion of municipal sewage treatment facilities Construction, appropriate reserve space for development, centralized if appropriate, scattered if appropriate. Speed up We will improve sewage collection and treatment capacity in key towns along the Yangtze River Economic Belt. Yangtze River basin and south In local areas, classified measures should be taken to reduce the overflow pollution of the combined pipe network, and the combined system should be promoted according to local conditions ，Construction of rapid purification facilities for overflow sewage. During the "14th Five-Year Plan" period, the sewage treatment capacity was added 20 million cubic meters per day.

2. Technical requirements.

About the layout of sewage treatment facilities. Take full account of urban population size, nature and land，Management conditions, spatial layout and industrial development, as well as sewage collection network construction and sewage resources，Source utilization needs, reasonable planning of urban sewage treatment plant layout, scale and service pattern Wring. Densely populated areas with large sewage discharge should be mainly treated in a centralized manner，Areas with few mouths, relatively dispersed, and difficult to cover by centralized treatment facilities in the short term，It is necessary to construct distributed and miniaturized sewage treatment facilities. The organized towns were adapted to local conditions and adopted nearby Centralized joint construction, city side takeover and other ways to build sewage treatment facilities, promote the "biological + ecological" sewage treatment technology.Discharge standards for sewage treatment plants. Cities of Yangtze River Delta and Guangdong-Hong Kong-Macao Greater Bay Area, Beijing Cities at prefecture level and above along the Tianjin-Hebei, Yangtze River main stream and South-to-North Water Diversion project, Yellow River basin Provincial capital cities, separately planned cities can put forward stricter pollutants for urban sewage treatment plants，Emission control requirements. The treatment of wastewater in water environment sensitive areas has basically reached the Grade A discharge standard Allowed. In other areas, emission standards are scientifically determined according to local conditions, and it is not appropriate to blindly raise standards. Close Sewage plants in residential areas and environmentally sensitive areas should build deodorization facilities and ensure deodorization effect.About the combined overflow sewage rapid purification facilities. Checking and repairing the district pipe network，Under the premise of reconstruction, the construction of rapid purification facilities for combined overflow sewage is implemented with high efficiency，Remove sedimentary particles and floating matter, effectively reduce the total amount of urban water pollutants, promote Long-term maintenance of water environmental quality.

(3) Strengthen the construction of recycling facilities and promote the utilization of sewage resources

Construction task. Combined with existing sewage treatment facilities upgrading and capacity expansion, system Planning urban sewage recycling facilities, reasonable determination of recycled water utilization direction, promote real Now divided quality, sub-object water supply, excellent water use. Downstream of the key sewage outlet, the river into the lake The mouth and branch flow into the main stream, and implement the regional recycled water recycling project according to local conditions. Lack of

The new urban area of the water city should plan the layout of the reclaimed water pipe network in advance and carry out the construction in an orderly manner. Ehoang

River basin prefecture-level and above cities as the focus, in the Beijing-Tianjin-Hebei, Yangtze River economic belt, the Yellow River flow Construction sewage in the region, along the South-to-North Water Diversion Project, in the arid areas of northwest China and in the coastal areas lacking water Demonstration cities for resource utilization, planning and construction of supporting infrastructure, and realizing the scale of reclaimed water Utilization. Construction of resource and energy benchmark reclaimed water plant. Encourage the extraction of nitrogen and phosphorus from sewage Matter. During the "14th Five-Year Plan" period, the capacity of new construction, reconstruction and expansion of recycled water production is not less than 15 million cubic meters per day