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Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 55027-2022: Project code for urban and rural sewerage Status: Valid
Basic dataStandard ID: GB 55027-2022 (GB55027-2022)Description (Translated English): Project code for urban and rural sewerage Sector / Industry: National Standard Word Count Estimation: 69,641 Date of Issue: 2022-03-10 Date of Implementation: 2022-10-01 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation GB 55027-2022: Project code for urban and rural sewerage---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.1 General 1.0.1 In order to promote the construction of ecological civilization and sustainable development, implement the concept of sponge city construction, improve the water environment, ensure drainage safety, and promote the utilization of water resources, this specification is formulated. 1.0.2 Urban and rural drainage projects must implement this specification. 1.0.3 The planning, construction and operation of drainage works shall follow the following principles. 1 Coordinate the ecological environment management and urban and rural construction of the regional watershed, protect and restore the natural accumulation, natural infiltration and natural purification capabilities of the ecological environment, reasonably control the intensity of urban development, and meet the requirements of the blue line and water surface rate. Realize the effective collection and treatment of domestic sewage and the safe treatment and disposal of sludge; 2 Coordinate the use of water resources and disaster prevention and mitigation, improve the infiltration, stagnation, and storage capacity of rainwater in cities and towns, make full use of recycled water, and strengthen the storage and utilization of rainwater. 3 Coordinate flood control and urban drainage and waterlogging prevention, improve the level of urban rainwater system construction, and strengthen the system connection between urban drainage and waterlogging prevention and river basin flood control. 1.0.4 Drainage projects should strengthen scientific and technological research, give priority to the adoption of new technologies, new processes, new materials, and new equipment that have been proven in practice and have technical and economic advantages, improve the collection and treatment efficiency of drainage projects and the level of waterlogging prevention and control, and promote resource recycling. Improve the level of scientific management and intelligence to achieve energy saving and consumption reduction throughout the life cycle. 1.0.5 Whether the technical methods and measures adopted in the project construction meet the requirements of this specification shall be judged by the relevant responsible parties. Among them, innovative technical methods and measures should be demonstrated and meet the performance requirements in this specification. 2 Basic regulations2.1 Scale and layout 2.1.1 Drainage engineering-related professional planning should be based on evaluating the current situation of the system, combined with urban and rural development trends, compiled and regularly updated according to drainage safety and water environment objectives; The special planning for urban construction and other professional planning such as urban vertical, road traffic, garden green space, underground space, pipeline integration, and disaster prevention are connected with each other. 2.1.2 Except for arid areas, the drainage system in newly built areas shall adopt a diversion system. 2.1.3 For the existing combined drainage system, the construction cost should be considered comprehensively. Implement feasibility and project benefits, and implement rainwater and sewage diversion reconstruction after technical and economic comparison; if the conditions for renovation are not met for the time being, the overflow pollution control target should be determined according to the water quality target and water environment capacity of the receiving water body, and comprehensive measures should be taken. Control overflow contamination. 2.1.4 Drainage works shall include rainwater system and sewage system. 2.1.5 The layout of the urban rainwater system shall meet the following requirements. 1 The principle of combination of green, blue and gray and combination of storage and discharge should be adhered to; 2.It should be determined in combination with urban flood control, surrounding ecological security pattern, urban vertical, blue-green space and land use layout; 3 Rainwater drainage safety, construction and operation costs, runoff pollution control and urban water ecological requirements should be considered comprehensively. 2.2.12 The anti-seismic fortification category of main facilities of urban drainage projects serving a population greater than.200,000 shall be classified as key fortification. 2.2.13 The main structure of the main structure of the drainage project and the underground main pipe, its structural design working life should not be less than 50-years, and the safety level should not be lower than Class III. 2.2.14 The power transformation and distribution and control equipment of the drainage project shall have measures to prevent flooding. The power supply of urban drainage works should be designed according to the secondary load, and the important equipment should be designed according to the primary load. 2.2.15 Drainage works should be equipped with testing instruments and automatic control systems, and information services should be provided by means of information technology. 2.2.16 In urban drainage projects, structures (buildings) such as grill rooms and rainwater storage tanks where toxic and harmful gases or flammable gases exist, should be equipped with corresponding gas monitoring and alarm devices. 2.2.17 Special construction plans should be formulated for special operations such as non-excavation construction of pipelines, crossing or crossing rivers in drainage works. 2.2.18 After the construction of the water storage structure of the drainage project, the full water test should be carried out, and it can be put into operation only after passing the test. 2.3 Operation and maintenance 2.3.1 When all or part of the drainage engineering facilities are out of service due to maintenance and other reasons, they should report to the competent department and take emergency measures. 2.3.2 In cities and qualified towns, rainwater pipes and sewage pipes should establish geographic information systems and update them dynamically. 2.3.3 Urban rainwater pipes and sewage pipes should be inspected and evaluated regularly, and should be maintained, rectified or updated according to the evaluation results. 2.3.4 Urban rainwater pipes and sewage pipes should be dredged in time, and the generated ditch sludge should be treated and disposed of. 2.3.5 When it is found that the manhole cover and rain gauge of the drainage project are missing or damaged, a warning sign should be set up immediately and repaired within 6 hours; when the relevant drainage management unit receives the information that the manhole cover and rain gauge are missing or damaged, they must Guardrails and warning signs shall be placed within 2 hours, and shall be repaired and restored within 6 hours. 2.3.6 The maintenance of rainwater pipes and sewage pipes shall comply with the following regulations. 1 When working on the road surface, safety warning signs should be set up in the maintenance work area, and maintenance personnel should wear safety warning clothing equipped with reflective cursors. Obstacles should be removed in time after the work is completed. 2 Smoking is strictly prohibited at the maintenance work site, and open flames are strictly prohibited without permission. When opening the pressure manhole cover, corresponding explosion-proof measures should be taken. 3 Before going into the well, the pipeline (drain) should be forcedly ventilated, and the concentration of toxic, harmful and explosive gases in the pipeline should be continuously detected. And ensure that the water depth and flow velocity in the pipeline meet the safety requirements for personnel to enter. 4 During the downhole operation, protective measures to ensure the safety of personnel should be taken according to the environmental conditions. 5 The safety performance of pipeline testing equipment shall comply with the relevant regulations on electrical equipment used in explosive gas atmospheres. 2.3.7 When venting and cleaning or maintaining the pipelines, structures (buildings) and equipment with toxic and harmful gases or flammable gases in sewage treatment plants and pumping stations, the concentration of toxic and harmful gases or flammable gases on the site should be continuously detected. And should take protective measures to ensure the safety of personnel. 3.4.8 Urban discharge channels should make full use of regional green spaces, protective green spaces, and non-traffic main roads, reasonably set up in combination with vertical elevations, and be directly connected to receiving water bodies or regulation and storage spaces. 3.4.9 The urban roads, as the drainage channels for waterlogging and risk relief, shall meet the following regulations. 1 When the design maximum water accumulation depth is reached, the ground floor of the surrounding residential buildings and industrial and commercial buildings shall not be flooded; 2 Driving direction signs, water level monitoring equipment and warning signs should be set up. 3.4.10 The river and lake water systems that undertake the function of urban drainage should be dispatched uniformly, and the water level should be lowered in advance before the rainstorm. 3.4.11 Urban multi-functional storage facilities and discharge channels should be set up with two operating modes, working and non-working, establish an early warning and forecast system, and determine the conditions for starting and closing the early warning; after starting the early warning and entering the working mode, people should be evacuated in time and vehicles, do a good job in traffic organization.4 sewage system4.1 General provisions 4.1.1 The sewage system shall include sewage pipe network, sewage treatment, reclaimed water treatment and utilization, and sludge treatment and disposal, so as to realize the effective collection, transportation, treatment, disposal and resource utilization of sewage. 4.1.2 The sewage treatment plant and its supporting sewage pipe network, sewage treatment facilities and sludge treatment and disposal facilities should be planned, constructed and operated simultaneously. The scale of urban sewage system transportation, treatment and other facilities should match. 4.1.3 The urban sewage treatment plant and its supporting sewage pipe network should be integrated. Professional operation management should ensure the systematicness and integrity of sewage collection and treatment. 4.1.4 Industrial enterprises should be concentrated in the park, the sewage and waste water in the industrial park should be collected and treated separately, and the tail water should not be included in the municipal sewage pipe and the south water pipe. Tail water from decentralized industrial wastewater treatment that meets environmental discharge standards should not be discharged into municipal sewage pipes. 4.1.5 Construction precipitation should not be discharged into municipal sewage pipes. 4.1.6 The quality of sewage discharged into municipal sewage pipes must comply with the relevant current national standards, and should not affect the normal operation of sewage pipes and sewage treatment facilities, etc., should not cause harm to operation and management personnel, and should not affect the regeneration of treated effluent Utilization and safe discharge should not affect the treatment and disposal of sludge. 4.1.7 Sewage treatment plants and sewage pumping stations shall be equipped with odor treatment facilities according to the requirements of environmental impact assessment. 4.1.8 The operation and maintenance of odor treatment facilities shall comply with the following regulations. 1.Within the protective range of the odor treatment facilities, open flame operations are strictly prohibited; 2 When entering the closed space of the odor collection and treatment system for inspection and maintenance, a gas mask should be worn, and natural ventilation or forced ventilation should be carried out; 3 When replacing activated carbon for deodorization, stop the machine and cut off the power, close the inlet and outlet valves, and wear a gas mask before opening the discharge port. 4.1.9 The pipelines conveying flammable, explosive, toxic and harmful substances must be tested for strength and tightness, and can only be put into operation after passing the test. 4.1.10 After the pressure-bearing structure with the risk of leakage of flammable and explosive gases passes the water test, it shall also undergo an air tightness test, and it may be put into operation only after passing the test. 4.1.11 The scale of the rural sewage system should be determined according to the actual local sewage volume and changing law. 4.1.12 Rural sewage treatment and sludge treatment and disposal should be adapted to local conditions, and priority should be given to resource utilization. 4.1.13 It is strictly forbidden to discharge untreated fecal sewage directly into the environment in rural areas. 4.2 Sewage pipe network 4.2.1 The sewage pipe network shall include facilities such as sewage pipes and their ancillary structures and pumping stations, and shall ensure the effective transportation of collected sewage. 4.2.2 The design flow rate of urban sewage pipelines shall be determined according to the long-term planned dry season design flow rate, and the coefficient of variation of comprehensive raw liquid sewage volume shall be selected reasonably. Guarantee the sewage delivery capacity at the highest day and the highest time, and review the delivery capacity of the pipeline under the design flow rate in the rainy season. 4.2.3 The design flow rate of the urban sewage collection station shall be determined according to the dry season design flow rate of the water inlet main pipe of the pumping station. The total installed flow is determined according to the design flow in the rainy season. 4.2.4 The existing sewage pipe network should be reconstructed and improved according to the results of pipeline inspection and evaluation, and damaged pipelines should be repaired. Eliminate the mixed connection of rain and sewage and the blank area of urban sewage collection facilities. The combined drainage system should control overflow pollution through measures such as rainwater source reduction, interception, regulation and storage, overflow outlet reconstruction, and overflow sewage treatment. 4.2.5 The design of urban sewage pipelines should consider the interconnection and intercommunication between sewage systems to ensure the safe operation of the system and facilitate maintenance. 4.2.6 Open channels are strictly prohibited for sewage collection and transportation. 4.2.7 The gravity flow sewage pipeline shall be designed according to the non-full pipe flow, and the short-term and long-term flow shall be considered to select the appropriate slope and the minimum slope corresponding to the design fullness to meet the self-cleaning requirements. 4.2.8 Sewage pipes should not run at full pipe flow in dry weather. Sewage pumping stations should operate at the design water level. Inverted siphons should be maintained to prevent silting. 4.2.9 The design and construction management of sewage pipelines should be strengthened, and the material, joints and foundation of the pipelines should be able to prevent leakage and entry of external water. 4.2.10 The interception wells and overflow outlets set along the river course shall be designed to prevent backflow of river water and shall not affect the rainwater discharge capacity. 4.2.11 The gradual elimination of septic tanks in the separate drainage system should be implemented under the premise of establishing relatively complete sewage collection and treatment facilities and a sound operation and maintenance system. 4.2.12 Sewage pipes and their subsidiary structures can be put into operation only after passing the tightness test. 4.3 Sewage and reclaimed water treatment 4.3.1 The sewage treatment plant should be able to effectively remove water pollutants, ensure that the discharged water meets the discharge standards, and should promote the recycling of resources. 4.3.2 The effluent of the sewage treatment plant, the sludge, odor and noise produced, and the urban recycled water shall comply with the relevant current national standards. 4.3.3 The scale of the urban sewage treatment plant shall be determined according to the average daily flow rate, and the treatment capacity of its structures shall meet the requirements of the design flow rate in the dry season and the design flow rate in the rainy season. 4.3.4 The scale of urban reclaimed water treatment facilities should be reasonably determined according to the local water resources, the water quantity and quality requirements of reclaimed water users, the location of users and the economical efficiency of recycling. 4.3.5 The construction of underground or semi-underground sewage treatment plants should be fully demonstrated for necessity and feasibility! 4.3.6 Sewage treatment The degree of sewage treatment should be determined according to the discharge standards stipulated by the state, the characteristics of sewage water quality, and the use of effluent after treatment, and the treatment process should be selected reasonably. 4.3.7 The number of sewage treatment and reclaimed water treatment structures and equipment must meet the requirements for sewage treatment and reclaimed water treatment during maintenance. 4.3.8 Sewage pretreatment shall ensure the removal effect of sand particles and inorganic suspended solids. 4.3.9 Sewage biological treatment should improve carbon source utilization efficiency and promote energy saving and consumption reduction in sewage treatment plants. 4.3.10 When stabilizing ponds or constructed wetlands are used for treatment, anti-seepage measures shall be taken to prevent groundwater from being polluted. 4.3.11 Disinfection facilities shall be installed in the sewage and regenerated water treatment system, and shall comply with the current relevant national standards. When responding to major emergencies such as epidemics, sewage treatment plants should strengthen the disinfection of effluent water. 4.3.12 Reclaimed water should be prioritized as landscape ecological water or supplementary water source for urban water bodies, and drainage and waterlogging prevention should be considered to ensure urban safety. 4.3.13 The emptying pipes and overflow pipes of urban reclaimed water storage facilities are strictly prohibited from being directly connected to sewage pipes or rainwater pipes, and sanitation protection work should be done to ensure the safety of reclaimed water quality. 4.3.14 Water supply facilities and reclaimed water utilization facilities in sewage treatment plants are strictly prohibited... ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 55027-2022_English be delivered?Answer: Upon your order, we will start to translate GB 55027-2022_English as soon as possible, and keep you informed of the progress. 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