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

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.