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

(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.