GB/T 51347-2019 English PDFUS$739.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 51347-2019: Technical standard for domestic wastewater treatment engineering of rural area Status: Valid
Basic dataStandard ID: GB/T 51347-2019 (GB/T51347-2019)Description (Translated English): Technical standard for domestic wastewater treatment engineering of rural area Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Z77 Classification of International Standard: 13.060.30 Word Count Estimation: 37,365 Date of Issue: 2019 Date of Implementation: 2019-12-01 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation GB/T 51347-2019: Technical standard for domestic wastewater treatment engineering of rural area---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 This standard is formulated to promote the improvement of rural living environment and standardize the construction, operation, maintenance and management of rural domestic sewage treatment projects. 1.0.2 This standard applies to administrative villages, natural villages, and scattered household sewage treatment projects newly built, expanded, and reconstructed, as well as household toilet renovation and toilet sewage treatment projects. 1.0.3 Rural domestic sewage treatment facilities should be based on village construction planning and location characteristics, and on the basis of comprehensive economic comparison and analysis of the construction, operation, maintenance and management of rural domestic sewage treatment facilities, appropriate treatment methods and technologies should be selected according to local conditions Technology and management methods; and the combination of resource utilization and agricultural production structure should be given priority. 1.0.4 The construction, operation, maintenance and management of rural domestic sewage treatment projects shall not only be carried out in accordance with this standard, but also comply with the relevant current national standards. 2 terms 2.0.1 rural domestic wastewater The sewage produced by rural residents mainly includes toilet sewage and domestic miscellaneous drainage. 2.0.2 toilet sewage black water High-concentration domestic sewage produced by human excretion and washing of feces, also known as black water. 2.0.3 Domestic miscellaneous drainage gray water Sewage from rural household kitchens, laundry, cleaning and bathing sewage, also known as gray water. 2.0.4 Domestic wastewater treatment facilities for rural area Structures or equipment for treating rural domestic sewage, including sewage treatment structures (equipment), supporting pipe networks and auxiliary facilities. 2.0.5 onsite wastewater treatment The method of on-site treatment of sewage from single or multiple households. 2.0.6 rural centralized wastewater treatment The sewage of villages or farmers within a certain range is collected through the pipe network and connected to the nearby rural domestic sewage treatment facilities. 2.0.7 Rural waste water into urban sewers Village sewage located in and around cities and towns is directly brought into the urban sewage pipe network after being collected by sewage branch pipes, and is treated uniformly by urban sewage treatment plants. 3 Basic Regulations3.0.1 The construction of rural domestic sewage treatment projects should be based on the specific conditions and requirements of each locality, comprehensive economic development and environmental protection, the relationship between the discharge and utilization of treated water, combined with the relevant development plans for rural areas and agriculture, and make full use of existing conditions and facilities. 3.0.2 Rural domestic sewage treatment should take the county-level administrative area as the unit, and implement unified planning, unified construction, unified operation, and unified management. 3.0.3 Rural domestic sewage treatment mainly includes three methods. household sewage treatment, village centralized sewage treatment, and urban sewage pipe network treatment, and should be based on pipe network laying conditions, drainage destination, conditions for incorporating into municipal pipe network, economic conditions and Management level, etc. determine the way of sewage treatment. 3.0.4 A guarantee system should be established for rural domestic sewage treatment projects. 3.0.5 The location and land use of the sewage treatment project shall comply with relevant national and local regulations.4 Design water quantity and quality4.1 Design water volume 4.1.1 The discharge of domestic sewage in rural areas shall be determined based on field survey data. 4.1.2 When there is no field survey data, the amount of sewage discharge should be determined according to the local population size, water use status, living habits, economic conditions, regional planning, etc. or according to the discharge volume of other similar areas, or according to the values in Table 4.1.2 and the emission factor are determined. Table 4.1.2 Reference value and discharge coefficient of daily water consumption of rural residents 4.2 Design water quality 4.2.1 The water quality of rural domestic sewage should be determined based on field survey data. 4.2.2 When there is no survey data, the design water quality should be determined according to the local population size, water use status, living habits, economic conditions, regional planning, etc. or the drainage water quality of other similar areas. When the farmer does not set up a septic tank, it can be determined according to the values in Table 4.2.2. Table 4.2.2 Reference values of domestic sewage water quality for rural residents (unit. mg/L, except pH value) Note. The concentration of the effluent after the toilet sewage is treated by the septic tank alone is higher than the reference value in the table. 4.2.3 The effluent quality of rural domestic sewage after treatment shall comply with the relevant provisions of the current national standards.5 Sewage collection5.1 General provisions 5.1.1 The collection of domestic sewage in rural areas should adopt a diversion system. 5.1.2 The rural domestic sewage collection and discharge system shall include the household sewage collection system in the farmer's courtyard, the sewage collection system outside the farmer's courtyard and the discharge system of sewage treatment facilities. 5.1.3 The sewage pipe and its slope should be determined according to the displacement and flow velocity. The design of sewage pipelines can be carried out in accordance with the relevant provisions of the current national standards "Code for Design of Water Supply and Drainage of Buildings" GB 50015 and "Code for Design of Outdoor Drainage" GB 50014. 5.1.4 In areas where it is difficult to lay gravity pipe networks, non-gravity drainage systems can be used. 5.2 Sewage collection 5.2.1 The laying method of rural courtyard sewage collection system should be determined in consideration of factors such as farmers' living habits, customs and culture, courtyard layout, and sewage treatment methods. 5.2.2 The sewage collection system in the farmer's yard shall include drainage pipes, inspection wells and other facilities. Toilet sewage and domestic miscellaneous drainage should be collected separately and recycled. When centralized sewage treatment in villages is adopted or incorporated into the urban sewage pipe network, toilet fecal sewage should be discharged into septic tanks first, and then into drainage pipes; kitchen and bathing sewage can directly enter drainage pipes (ditches). 5.2.3 Cleaning ports should be installed in front of kitchen and bathroom sewers, and inspection wells should be installed in front of courtyards. 5.2.4 The sewage collection system outside the courtyard shall include facilities such as household pipes, branch pipes, main pipes, inspection wells and lifting pump stations. The sewage pipe network should be laid reasonably according to the layout of the village, topography and other factors. 5.2.5 Rural drainage systems should adopt prefabricated inspection wells.6 Sewage treatment6.1 General provisions 6.1.1 The treatment of rural domestic sewage should adopt biofilm method (anaerobic biofilm tank, biological contact oxidation tank, biofilter, biological turntable, etc.), activated sludge method (domestic sludge method, oxidation ditch activated sludge method, Membrane bioreactors, etc.), natural biological treatment (constructed wetlands, stabilization ponds, etc.) and physical and chemical methods (grids, grit chambers, regulating ponds, and chemical phosphorus removal, etc.). On the basis of constantly summarizing scientific research results and practical experience, combined with local conditions, it is advisable to choose new techniques, new materials, and new equipment. 6.1.2 Rural domestic sewage treatment should be equipped with slag removal facilities and adjustment facilities. Slag removal facilities can choose mechanical grille, artificial grille or grid. 6.1.3 Grit chambers can be set up for domestic sewage treatment in rural areas. 6.1.4 Anti-seepage measures shall be taken for natural biological treatment, and groundwater shall not be polluted. 6.1.5 The sludge generated from rural domestic sewage treatment should be treated and disposed of regularly, and the sludge treatment and disposal should conform to the principle of resource utilization. Sludge treatment can be natural drying, composting, co-processing with solid organic matter in rural areas, or entering the municipal system to be treated together with municipal sludge. 6.1.6 Disinfection measures should be added when the effluent is required to be disinfected. 6.1.7 When the treatment effluent has total phosphorus removal requirements, phosphorus removal measures should be added. 6.1.8 When the odor generated during the treatment process pollutes the living environment, the odor should be treated. 6.1.9 When the noise generated by the treatment facilities pollutes the living environment, noise reduction measures should be taken. 6.1.10 The power supply of treatment facilities can be designed according to the third-level load level, and the sewage treatment facilities in important areas should be designed according to the second-level load level. 6.1.11 Insulation measures should be taken for sewage treatment facilities in low temperature areas. 6.2 Sewage treatment methods Ⅰ Household processing 6.2.1 Prefabricated devices can be used for household treatment. 6.2.2 Toilet sewage can be treated on-site or concentrated in a region and then be used as a resource. 6.2.3 Domestic miscellaneous drainage can be treated as a resource after natural biological treatment. 6.2.4 Household processing can adopt the following main technical routes according to requirements. 1 COD removal technical route 1 The sewage is discharged or resource utilization after being treated by the biological contact oxidation unit to meet the standard. 2 COD removal technology route 2 In areas suitable for the deployment of ecological units, sewage is treated by anaerobic biofilm units and then treated by natural biological treatment units to meet the standards before discharge or resource utilization.3 Technical route for total nitrogen removalSewage is discharged or resourced after being treated by anoxic and aerobic biological units. Ⅱ centralized processing 6.2.5 Centralized treatment can use structures or prefabricated devices. 6.2.6 Centralized processing can adopt the following main technical routes according to requirements. 1 COD removal technical route 1 The sewage is discharged or resource utilization after being treated by the biological contact oxidation unit to meet the standard. 2 COD removal technology route 2 In areas suitable for the deployment of ecological units, sewage is treated by anaerobic biofilm units and then treated by natural biological treatment units to meet the standards before discharge or resource utilization.3 Technical route for total nitrogen removalSewage is discharged or resourced after being treated by anoxic and aerobic biological units.4 Technical route for total nitrogen and total phosphorus removalThe sewage is treated by the anoxic and aerobic biological units, and then discharged or reused after being treated by the phosphorus removal unit. Ⅲ Incorporated into urban sewage pipe network for treatment 6.2.7 When the village sewage should be included in the urban sewage pipe network, the domestic sewage should be connected to the urban sewage pipe network for unified treatment by the urban sewage treatment plant. 6.2.8 The design of pipelines, inspection wells and pumping stations shall comply with the relevant provisions of the current national standard "Code for Design of Outdoor Drainage" GB 50014. 6.3 Sewage Treatment Technology Ⅰ Septic tank 6.3.1 The septic tank should be used to treat toilet sewage, and domestic miscellaneous drainage should not be discharged into the septic tank. 6.3.2 Prefabricated chemical products should be used for septic tanks, and the volume should include the volume of sludge storage. The residence time of sewage in the septic tank should be 24h~36h, and the cleaning cycle should be 3~12 months. 6.3.3 The wall and bottom of the septic tank should be treated with anti-seepage, and the groundwater and surrounding environment should not be polluted, and anti-odor and anti-explosion measures should be taken. Ⅱ Anaerobic biofilm pool 6.3.4 Anaerobic biofilm tanks can be used for pretreatment of rural domestic sewage. 6.3.5 The filling height of the anaerobic biofilm tank filler should not be less than 2/3 of the tank depth. 6.3.6 The hydraulic retention time of the anaerobic biofilm tank should be 2 days to 5 days, and the sludge discharge interval should be 3 months to 12 months. 6.3.7 Anti-seepage and explosion-proof measures shall be taken for the anaerobic biofilm pool. Ⅲ Biological Contact Oxidation Pool 6.3.8 The biological contact oxidation pond can be used for household sewage treatment and centralized treatment of rural domestic sewage. 6.3.9 The biological contact oxidation tank can adopt single-stage and multi-stage contact oxidation. When there is a deoxygenation requirement, the combined process of anoxic pool and aerobic pool should be used. 6.3.10 The volume load of BOD5 in the biological contact oxidation tank should be taken according to the provisions in Table 6.3.10. Table 6.3.10 BOD5 volume load of biological contact oxidation pond [kg/(m3·d)] Note. The aerobic pool (I) is a treatment method for removing COD function, and the aerobic pool (II) and the anoxic pool are used in combination when denitrification is required. Ⅳ biological filter 6.3.11 Biological filter can be used for centralized treatment of rural domestic sewage. 6.3.12 The biofilter shall consist of a pool body, filter material, water distribution device and drainage system. The water distribution device can be fixed or mobile; the drainage system should be equipped with water seepage device, water collecting ditch and general drainage ditch. The hydraulic load should be 0.1m3/(m2·h)～0.5m3/(m2·h). Ⅴbiological turntable 6.3.13 The biological turntable process can be used for centralized treatment of rural domestic sewage. 6.3.14 Single-axis multi-stage turntable should be used for centralized sewage treatment in villages, and it should not be less than 3 stages. 6.3.15 The BOD5 area load of the biological turntable should be 6gBOD5/(m2·d)～30gBOD5/(m2·d). Ⅵ oxidation ditch 6.3.16 Oxidation ditch process can be used for centralized treatment of rural domestic sewage. 6.3.17 The organic load of the oxidation ditch should be 0.16kgBOD5/(m3·d)～0.35kgBOD5/(m3·d), and the sludge load should be 0.03kgBOD5/(kgMLSS·d)～0.10kgBOD5/(kgMLSS·d) d). 6.3.18 The single-ditch oxidation ditch can be denitrified by the operation mode of continuous water inflow and intermittent aeration. Ⅶ Activated sludge process 6.3.19 Activated sludge method can be used for centralized treatment of rural domestic sewage. 6.3.20 The volume load of the activated sludge method should be 0.1kgBOD5/(m3·d)～0.4kgBOD5/(m3·d). 6.3.21 The activated sludge method can use the continuous water inflow intermittent aeration operation mode to remove nitrogen. Ⅷ Constructed Wetland 6.3.22 Before sewage enters the constructed wetland, biological treatment should be used to reduce the concentration of pollutants. 6.3.23 The design of constructed wetland should be calculated according to pollutant removal load and hydraulic load. The design parameters should be determined according to the test or the operation data of similar local sewage treatment projects. When there is no relevant information, the value can be taken according to the provisions in Table 6.3.23. Table 6.3.23 Main Design Parameters of Constructed Wetlands 6.3.24 Constructed wetlands should be regularly cleared of silt. Ⅸ Stabilization Pond 6.3.25 Before sewage enters the stabilization pond, biological treatment should be used to reduce the concentration of pollutants. 6.3.26 The type of stabilization pond should be selected according to local conditions. The surface load of BOD5 in anaerobic ponds should be 20g/(m2·d)～40g/(m2·d); the surface load of BOD5 in facultative ponds should be 3.0g/(m2·d)～10g/(m2·d); The BOD5 load of the oxygen pond should be 1.0g/(m2·d)～3.0g/(m2·d); the BOD5 load of the aeration pond should be 5.0g/(m2·d)～40g/(m2·d). 6.3.27 The bottom and surroundings of the stabilization pond should be treated with anti-seepage.7 Construction and acceptance7.1 Construction 7.1.1 The construction of structures shall comply with the relevant provisions of the current national standard "Code for Construction and Acceptance of Water Supply and Drainage Structures" GB 50141. 7.1.2 The construction of the pipeline shall comply with the relevant provisions of the current national standard "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering" GB 50268. 7.1.3 The construction of equipment can be carried out in accordance with the relevant provisions of the current national standard "Code for Construction of Urban Sewage Treatment Plant Engineering" GB 51221. 7.2 Acceptance 7.2.1 The functional test of structure acceptance can be carried out in accordance with the relevant provisions of the current national standard "Code for Construction and Acceptance of Water Supply and Drainage Structure Engineering" GB 50141. 7.2.2 The functional test of the pipeline can be carried out according to the relevant provisions of the current national standard "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering" GB 50268. 7.2.3 Equipment acceptance can be carried out in accordance with the relevant provisions of the current national standard "Code for Acceptance of Engineering Quality of Urban Sewage Treatment Plants" GB 50334. 7.2.4 The acceptance items should include the water quality and quantity indicators before and after treatment by the facility. 8 Operation, maintenance and management 8.0.1 The operation, maintenance and management of rural domestic sewage treatment facilities should adopt urban and rural overall planning, unified operation, unified maintenance and unified management. 8.0.2 A sound record and preservation system for operation, maintenance and management data shall be established. 8.0.3 Regularly inspect and maintain drainage pipes, pipe joints and preservation systems. 8.0.4 Regular inspection and maintenance should be performed to clean the kitchen sewer and bathroom drain cleaning outlets. 8.0.5 Inspection wells should be inspected and cleaned regularly. 8.0.6 The sewage treatment structures and related equipment should be regularly maintained, inspected and cleaned. 8.0.7 The operating parameters should be adjusted regularly according to the characteristics of water quality and quantity. 8.0.8 The operation and maintenance personnel should be trained regularly. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 51347-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 51347-2019_English as soon as possible, and keep you informed of the progress. 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