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HJ 2009-2011: Technical specifications of the biological contact oxidation sewage treatment works
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HJ 1347.1   HJ 1347.2   HJ 1346.1   

Basic data

Standard ID HJ 2009-2011 (HJ2009-2011)
Description (Translated English) Technical specifications of the biological contact oxidation sewage treatment works
Sector / Industry Environmental Protection Industry Standard
Word Count Estimation 34,371
Date of Issue 2011-10-24
Date of Implementation 2012-01-01
Regulation (derived from) Department of Environmental Protection Notice 2011 No. 74
Issuing agency(ies) Ministry of Ecology and Environment

HJ 2009-2011: Technical specifications of the biological contact oxidation sewage treatment works


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Technical specifications of the biological contact oxidation sewage treatment works National Environmental Protection Standard of the People's Republic Biological contact oxidation wastewater treatment engineering technical specification Technical specifications for wastewater treatment by biological contact Oximetry process Published on.2011-10-24 2012-01-01 Implementation Ministry of Environmental Protection released

Content

Foreword..II 1 Scope 1 2 Normative references 1 3 Terms and definitions. 2 4 General requirements 3 5 Design water quantity and design water quality..4 6 Process Design 6 7 Major equipment and materials..13 8 Detection and control 14 9 Major auxiliary works.15 10 Construction and acceptance..15 11 Operation and maintenance..18 Appendix A (Normative Appendix) Biofilm Filler..20 Appendix B (informative) Determination of biomass in biological contact oxidation ponds.27 Appendix C (informative) Determination of filler biofilm thickness and biological activity. Microelectrode method..29

Foreword

Standardize biological contact oxygen for the implementation of the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on the Prevention and Control of Water Pollution This standard is formulated for the construction and operation management of chemical wastewater treatment projects, prevention and control of environmental pollution, protection of the environment and human health. This standard specifies the process design, main process equipment and materials of wastewater treatment engineering using contact oxidation method and its combined process. Technical requirements for inspection and process control, construction and acceptance, operation and maintenance. This standard is the first release. This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection. This standard is mainly drafted by. China Environmental Protection Industry Association (Water Pollution Control Committee), Tianjin Environmental Protection Science Research Institute, School of Environmental Science and Engineering, Nankai University, Beijing Sande Environmental Protection Group Co., Ltd., Beijing Construction Engineering Jinyuan Environmental Protection Development Co., Ltd. Tsinghua University Environmental College, Hangzhou Tianyu Environmental Engineering Industrial Co., Ltd. This standard was approved by the Ministry of Environmental Protection on October 24,.2011. This standard has been implemented since January 1,.2012. This standard is explained by the Ministry of Environmental Protection. Biological contact oxidation wastewater treatment engineering technical specification

1 Scope of application

This standard specifies the work of sewage treatment engineering using biological contact oxidation method (hereinafter referred to as contact oxidation method) and its combined process. Technical requirements for art design, main process equipment and materials, testing and process control, construction and acceptance, operation and maintenance. This standard is applicable to domestic sewage or industrial wastewater treatment projects using contact oxidation method and its combined process, which can be used as an environmental impact. Technical basis for evaluation, engineering design, construction, environmental protection acceptance and facility operation and management.

2 Normative references

The contents of this standard refer to the terms in the following documents. For undated references, the valid version applies to this standard. GB 3096 Acoustic Environmental Quality Standard GB 12348 Environmental noise emission standards for industrial enterprises General rules for safety and health requirements of GB 12801 production process GB 18918 Pollutant discharge standard for urban sewage treatment plants GB 50014 Outdoor Drainage Design Code GB 50015 Building Water Supply and Drainage Design Code GB 50016 Building Design Fire Code GB 50040 power machine basic design specification GB 50053 10kV and below substation design specifications GB 50187 General Plan for Design of Industrial Enterprises GB 50204 Concrete Structure Engineering Construction Quality Acceptance Specification GB 50222 Building interior decoration design fire protection specification General specification for construction and acceptance of GB 50231 mechanical equipment installation engineering GB 50268 Water supply and drainage pipeline engineering construction and acceptance specifications GB 50334 Urban Wastewater Treatment Plant Engineering Quality Acceptance Specification GB J 87 Industrial Enterprise Noise Control Design Specification GB J 141 Code for construction and acceptance of water supply and drainage structures GBZ 1 industrial enterprise design hygiene standard GBZ 2 workplace occupational exposure limit CJ 3025 Urban sewage treatment plant sewage sludge discharge standard CJJ 60 Urban Wastewater Treatment Plant Operation, Maintenance and Safety Technical Regulations HJ/T 15 Environmental Protection Product Technical Requirements Ultrasonic Open Channel Sewage Flowmeter HJ/T 91 Surface Water and Wastewater Monitoring Technical Specifications HJ/T 96 PH water quality automatic analyzer technical requirements HJ/T 101 Ammonia Nitrogen Water Quality Analyzer Technical Requirements HJ/T 103 Total Phosphorus Water Quality Automatic Analyzer Technical Requirements HJ/T 242 environmental protection product technical requirements belt press filter for sludge dewatering HJ/T 245 Environmental Protection Products Technical Requirements Hanging Packing HJ/T 246 Environmental Protection Products Technical Requirements Suspended Packing HJ/T 251 environmental protection product technical requirements Roots blower HJ/T 252 environmental protection product technical requirements, microporous aerator HJ/T 263 Environmental Protection Product Technical Requirements Jet Aerator HJ/T 278 environmental protection product technical requirements single-stage high-speed aeration centrifugal blower HJ/T 279 environmental protection product technical requirements push flow submersible mixer HJ/T 283 environmental protection product technical requirements chamber filter press and plate and frame filter press HJ/T 335 environmental protection product technical requirements sludge concentration belt dewatering machine HJ/T 353 Water Pollution Source Online Monitoring System Installation Technical Specification (Trial) HJ/T 354 Water Pollution Source Online Monitoring System Acceptance Technical Specification (Trial) Technical Specifications for Operation and Assessment of HJ/T 355 Water Pollution Source Online Monitoring System (Trial) HJ/T 377 Environmental Protection Products Technical Requirements Chemical Oxygen Demand (CODCr) Water Quality Online Automatic Monitor Measures for the Administration of Environmental Protection Acceptance for Completion of Construction Projects (National Environmental Protection Agency,.2001)

3 Terms and definitions

The following terms and definitions apply to this standard. 3.1 Biological contact oxidation process Refers to an aerobic biofilm wastewater treatment method, which consists of a filler immersed in sewage, a biofilm on the surface of the filler, and an aeration system. The composition of the pool and the pool. Under aerobic conditions, the sewage is in full contact with the biofilm fixed on the surface of the filler and removed by biodegradation. The organic matter, nutrient salts, etc. in the sewage will purify the sewage. 3.2 Contact oxidation tank Biological contact oxidation tank Refers to the cell body used to install the packing and complete the biological treatment process of the wastewater. 3.3 Filler Bio-media/carrier Refers to a solid medium or carrier that is installed in a contact oxidation pond to provide habitat and growth for microorganisms while immobilizing microorganisms. 3.4 Biofilm Biofilm Refers to a membranous microbial aggregate with a sewage purification function attached to the surface of the filler. 3.5 Aeration system Refers to a system that delivers compressed air to an aerobic contact oxidation pond or oxygenates the sewage, by air compressors, pipes, valves, and releases And so on. 3.6 Aeration area Refers to the area where the bottom of the contact oxidation tank can be used to arrange the aeration device. 3.7 filler layer bio-media layer Refers to the area where the filler is placed in the middle of the oxidation pond. The arrangement and quantity of the packing are related to the height of the tank, the type of packing and the quality of the incoming water. 3.8 Stable layer Refers to the water layer that contacts the upper part of the oxidation cell packing layer to stabilize the water. 3.9 Filling volume load Bio-media/carrier volumetric loading rate Refers to the amount of pollutants processed per cubic meter of filler per day, including five-day biochemical oxygen demand volumetric load, nitrification volumetric load, denitrification Volume load, etc. 3.10 ratio of air to water Refers to the volume ratio of the amount of gas introduced per unit time to the amount of water per unit time, usually an empirical value. 3.11 Filling ratio Bio-media/carrier filling ratio Refers to the ratio of the volume of the filler in the contact oxidation pond to the effective volume of the cell, usually an empirical value. 3.12 Pretreatment When the influent water quality cannot meet the biochemical requirements of the biological contact oxidation process, according to the need to adjust the water quality, in the biological contact oxidation pond The previously set processing processes, such as hydrolysis acidification, air flotation, homogenization, coagulation sedimentation, anaerobic and the like. 3.13 Pre-processing Front process Refers to the conventional treatment measures set in front of the biological contact oxidation reaction tank, such as grid, grit, primary sedimentation, etc.

4 General requirements

4.1 The contact oxidation process should be applied to the following wastewater treatment projects. a) industrial wastewater that can be treated by biological methods; b) domestic sewage such as living quarters and public buildings; c) Urban sewage. 4.2 Contact oxidation process The sewage treatment plant (station) shall implement the following provisions. a) The choice and overall layout of the sewage treatment plant (station) site should comply with the relevant provisions of GB 50014. The general plan design should conform to GB 50187 Relevant regulations. b) The flood control standard of the sewage treatment plant (station) should not be lower than the urban flood control standard and have good drainage conditions. c) The fire protection design of the sewage treatment plant (station) building shall comply with the provisions of GB 50016 and GB 50222. d) Treatment and discharge of waste gas, waste water, waste residue and other pollutants generated during the construction and operation of sewage treatment plants (station), National environmental protection regulations and relevant standards shall be implemented. e) The noise and vibration control design of the sewage treatment plant (station) shall comply with the provisions of GB J87 and GB 50040, inside and outside the machine room. The noise shall comply with the provisions of GBZ 2 and GB 3096 respectively, and the noise at the boundary of the plant shall comply with the provisions of GB 12348. f) Occupational health and labor safety should be emphasized in the design, construction and operation of sewage treatment plants (station), in line with GBZ 1, GBZ 2 And the provisions of GB 12801. At the same time that the sewage treatment project is completed and operated, safety and sanitary protection facilities should be completed and operated at the same time. 4.3 The urban sewage treatment plant shall install the online monitoring system in accordance with the relevant provisions of GB 18918. Other sewage treatment projects shall be in accordance with the state. Or local environmental management requirements require the installation of an online monitoring system. The installation, acceptance and operation of the online monitoring system shall be in accordance with HJ/T 353, HJ/T 354 and HJ/T 355 related regulations.

5 Design water quantity and design water quality

5.1 Design water volume 5.1.1 Urban sewage design flow 5.1.1.1 The design flow rate of urban dry flow sewage shall be calculated according to formula (1). Mddr QQQ = (1) In the formula. drQ -- design flow of dry sewage, L/s; dQ -- design of integrated domestic sewage, L/s; mQ -- Design industrial wastewater volume, L/s. 5.1.1.2 The planned flow rate of urban combined sewage shall be calculated according to formula (2). Dr sQ QQ= (2) In the formula. Q -- sewage design flow, L/s; drQ -- design flow of dry sewage, L/s; sQ -- Rainwater design flow, L/s. 5.1.1.3 The integrated domestic sewage design flow is the product of the service population and the corresponding integrated domestic sewage quota. Integrated domestic sewage quota It should be determined according to the local water quota, combined with the level of the building's internal water supply and drainage facilities and the popularity of the drainage system. Can be local 80% to 90% of the relevant water quota is designed. 5.1.1.4 The total coefficient of change of comprehensive domestic sewage volume should be determined according to the measured data of the actual change of local integrated domestic sewage, without measurement When determining the data, it can be valued according to the relevant provisions of GB 50014. See Table 1. Table 1 Total coefficient of variation of integrated domestic sewage Average daily flow (L/s) 5 15 40 70 100.200 500 ≥1000 Total coefficient of variation 2.3 2.0 1.8 1.7 1.6 1.5 1.4 1.3 5.1.1.5 The design flow of industrial wastewater discharged into the municipal pipe network shall be based on the industrial pollution source wastewater within the coverage of the municipal municipal drainage system. Emission statistics survey data is determined. 5.1.1.6 The design flow of rainwater refers to the relevant provisions of GB 50014. 5.1.1.7 In areas with high groundwater levels, the amount of infiltration groundwater should be considered. The amount of infiltration groundwater should be determined based on actual measured data. 5.1.1.8 Design flow of different structures a) Lifting pump station, grid well and grit chamber should be calculated according to the design flow of combined sewage. b) The initial sedimentation tank should be designed according to the dry flow rate, and the flow rate should be checked by the combined sewage design. The check time of the check should not be less than 30min. c) The contact oxidation pond should be designed according to the daily average sewage flow rate of the dry stream, and the water supply facilities such as pumps and pipelines before and after the contact with the oxidation pond should be dry. The highest sewage flow rate design at the highest point of the flow. 5.1.2 Industrial wastewater design flow 5.1.2.1 Industrial wastewater design flow rate shall be designed according to the actual wastewater discharge flow measured at the total discharge port of the plant or industrial park. Determination method should be HJ/T 91 regulations. 5.1.2.2 The change of industrial wastewater flow rate should be measured according to the characteristics of the process. 5.1.2.3 When the actual measurement data cannot be obtained, it can be determined by reference to the relevant provisions of the current national industrial water consumption. Or according to similar work The factory drainage data is determined analogously. 5.1.2.4 When there is industrial wastewater and domestic sewage combined, the amount of domestic sewage and bathing water in the factory or industrial park Determined, it should comply with the relevant provisions of GB 50015. 5.1.2.5 The design flow rate of the centralized sewage treatment plant in the industrial park can refer to the method for determining the design flow of urban sewage. 5.2 Design water quality 5.2.1 The design water quality of urban sewage should be determined according to the actual survey data, and the measurement method and data processing method should be consistent. HJ/T 91 regulations. When there is no survey data, the design is converted according to the following criteria. a) The 5-day biochemical oxygen demand of domestic sewage is calculated from 25g to 50g per person per day; b) The amount of suspended solids in domestic sewage is calculated from 40g to 65g per person per day; c) The total nitrogen content of domestic sewage is calculated from 5g to 11g per person per day; d) The total phosphorus content of domestic sewage is calculated from 0.7g to 1.4g per person per day. 5.2.2 The design of industrial wastewater should be determined according to the actual measurement data of industrial wastewater. The determination method and data processing method should be Meet the requirements of HJ/T 91. When there is no actual measurement data, it is determined by reference to the emission data analogy of similar plants. 5.2.3 The inlet water of the contact oxidation pond shall meet the following conditions. a) the water temperature should be 12 ° C ~ 37 ° C, the pH should be 6.0 ~ 9.0, the nutrient combination ratio (BOD5. ammonia nitrogen. phosphorus) should be 100.5.1, when When the ratio of nitrogen to phosphorus is less than the ratio of nutrient combination, nitrogen and phosphorus should be supplemented appropriately; b) When removing ammonia nitrogen, the ratio of total alkalinity (calculated as CaCO3)/ammonia nitrogen (NH3-N) of influent should not be less than 7.14. Supplement alkalinity; c) When the total nitrogen is removed, the BOD5/total nitrogen value of the easily degradable carbon source of the influent water should not be less than 4.0. If it is not satisfied, the carbon source should be supplemented. 5.3 Contaminant removal rate The design value of the pollutant removal rate of the contact oxidation wastewater treatment process can be determined according to Table 2. Table 2 Design values of pollutant removal rate in contact oxidation wastewater treatment process Contaminant removal rate (%) Sewage category suspension (SS) Biochemical oxygen demand (BOD5) Chemical oxygen demand (CODCr) ammonia nitrogen total nitrogen Urban sewage 70～90 80～95 80～90 60～90 50～80 Industrial wastewater 70～90 70～95 60～90 50～80 40～80

6 Process design

6.1 General requirements 6.1.1 When the system directly discharges water, it should comply with national or local emission standards. When discharging to the next processing unit, it should conform to the next level. The water intake requirements of the processing unit. 6.1.2 The sewage treatment plant (station) with large changes in the influent water quality and quantity of water should be equipped with water quality and water quantity adjustment facilities. 6.1.3 The contact oxidation treatment structure should adopt a double series parallel design. 6.1.4 Contact oxidation process Wastewater treatment process can use different types of fillers, including. suspended filler, suspended filler and fixed Filler, etc. 6.1.5 Contact oxidation process The sewage treatment process should preferably use high-efficiency fillers. The need to contact the oxidation pond should be determined according to the wastewater treatment requirements. Total biomass and filler-attached biomass, and consider the effect of attached biofilm thickness and biofilm activity on wastewater treatment. 6.2 Pre-treatment, post-treatment and pre-treatment 6.2.1 Pre-processing 6.2.1.1 The urban sewage treatment project and the industrial wastewater treatment project for the combined treatment of domestic sewage shall be provided with grille channels. Grille design Should comply with the provisions of GB 50014. 6.2.1.2 The centralized treatment of urban sewage and the centralized wastewater treatment project of industrial parks shall be provided with grit chambers. The design of the grit chamber should be In accordance with the provisions of GB 50014. 6.2.1.3 When the influent suspended solids concentration is higher than the five-day biochemical oxygen demand design value of 1.5 times, the urban sewage treatment project should be set with initial sedimentation. Pool. Under normal circumstances, the industrial wastewater treatment project may not have a primary sedimentation tank. The design of the primary sedimentation tank shall comply with the provisions of GB 50014. 6.2.2 Post-processing 6.2.2.1 Urban sewage treatment process and industrial wastewater treatment project shall be post-treatment according to the requirements of treated effluent, ordinary post-processing list The meta-process includes. final settling tank, sterilization and disinfection tank, sludge concentration and dehydration process. 6.2.2.2 When the treated effluent does not meet the discharge requirements or the reuse requirements, the corresponding post-treatment process should be added, and the alternative treatment process should be added. Including. coagulation/precipitation or air flotation, filtration, membrane separation, advanced oxidation, bio-enhancement treatment. 6.2.3 Pretreatment 6.2.3.1 When the chemical oxygen demand concentration of the influent exceeds.2000 mg/L, the anaerobic pretreatment process should be increased. 6.2.3.2 When the BOD5/COD of the influent is less than 0.3, it is advisable to increase the anaerobic treatment process of the hydrolysis acidification method to improve the biodegradability of the wastewater. 6.2.3.3 When treating sewage with oil content greater than 50mg/l, a pretreatment process such as grease trap and air flotation should be added. 6.2.3.4 When the influent pH exceeds 6.0 to 9.0, a pretreatment process of acid-base neutralization should be added. 6.2.3.5 The temperature of the inlet water should be controlled not lower than 12 °C, or not higher than 37 °C. When the water temperature is outside the control range, consider setting the heating system. Or set the cooling device. 6.2.3.6 When the inlet water temperature is high, the design of the hydraulic retention time should be low; when the inlet water temperature is low, the design of the hydraulic retention time High values should be taken. 6.2.3.7 For industrial wastewater with a suspended solid concentration exceeding 500 mg/L, it is advisable to set the initial sedimentation tank according to the water quality, or to adopt coagulation/sinking. Pretreatment process such as precipitation or air floatation. 6.2.3.8 When the influent calcium content is greater than or equal to 100mg/L, it is advisable to adopt a pretreatment process to prevent filler fouling. 6.3 Contact oxidation process 6.3.1 Basic process flow The basic process of the contact oxidation process consists of two parts, a contact oxidation pond and a sedimentation tank, which can be selected according to the influent water quality and treatment effect. Use a primary contact oxidation cell or a multi-stage contact oxidation cell (Figure 1, Figure 2). Effluent contact oxidation pond inlet sedimentation tank Figure 1 Flow chart of the first-level contact oxidation process Figure 2 Flow chart of secondary contact oxidation process 6.3.2 Combined process flow 6.3.2.1 The contact oxidation process can be applied alone or in combination with other wastewater treatment processes. Can be used for carbon oxidation when used alone And nitrification, denitrification should be set before the contact oxidation tank to set up anoxic tank, phosphorus removal should be combined with chemical phosphorus removal process. 6.3.2.2 The combined process of “anoxic contact oxidation and aerobic contact oxidation” is suitable for carbon removal and desorption of common domestic sewage. Nitrogen treatment (see Figure 3). Figure 3 Process of removing carbon and nitrogen 6.3.2.3 The combined process of hydrolysis acidification contact oxidation as the main process is suitable for the treatment of refractory organic wastewater (see Figure 4). First-order contact oxidation tank sedimentation tank inlet water Discharge Secondary contact oxidation pond Anoxic pool sedimentation tank wastewater contact oxidation pond Water return Compliance emission control tank sedimentation tank wastewater contact oxidation pond hydrolysis acidification tank Figure 4 Combination process of oxidizing treatment of refractory organic wastewater 6.3.2.4 Th...

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