HJ 578-2010_English: PDF (HJ578-2010)
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Technical specifications for oxidation ditch activated sludge process
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HJ 578-2010
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| Standard ID | HJ 578-2010 (HJ578-2010) | | Description (Translated English) | Technical specifications for oxidation ditch activated sludge process | | Sector / Industry | Environmental Protection Industry Standard | | Word Count Estimation | 30,393 | | Date of Issue | 2010-10-12 | | Date of Implementation | 2011-01-01 | | Quoted Standard | GB 3096; GB 12348; GB 12801; GB 18599; GB 18918; GB 50014; GB 50015; GB 50016; GB 50040; GB 50053; GB 50187; GB 50204; GB 50231; GB 50268; GB 50352; GBJ 87; GB 50141; GBZ 1; GBZ 2; CJ/T 1; CJJ 60; HJ/T 91; HJ/T 242; HJ/T 247; HJ/T 259; HJ/T 260; HJ/T 279; HJ/T 280; HJ/T 283; HJ/T 335; HJ/T 353; HJ/T 354; HJ/T 355 | | Drafting Organization | China Environmental Protection Industry Association (Water Pollution Control Committee) | | Regulation (derived from) | Department of Environmental Protection Notice No. 73 of 2010 | | Summary | This standard specifies the use of oxidation ditch activated sludge wastewater treatment engineering process design, major equipment, detection and control, electrical, construction and acceptance, operation and maintenance of the technical requirements. This standard applies to adopt oxidation ditch activated sludge of sewage and industrial wastewater treatment works, can be used as environmental impact assessment, design, construction, commissioning and operation and management after the completion of the technical basis. | HJ 578-2010
Technical specifications for oxidation ditch activated sludge process
National Environmental Protection Standard of the People's Republic
Oxidation ditch activated sludge method sewage treatment engineering technical specification
Released on.2010-10-12
2011-01-01 Implementation
Ministry of Environmental Protection released
Ministry of Environmental Protection
announcement
No. 73 of.2010
To implement the "Environmental Protection Law of the People's Republic of China" and the "Water Pollution Prevention and Control Law of the People's Republic of China"
Designed and operated, the six standards, such as the Technical Specifications for Brewing Industrial Wastewater Treatment, are now approved as national environmental protection standards and issued.
The standard name and number are as follows.
I. Technical specifications for brewing industrial wastewater treatment engineering (HJ 575-2010)
2. Technical specification for wastewater treatment engineering of anaerobic-anoxic-aerobic activated sludge process (HJ 576-2010)
3. Technical specification for sequencing batch activated sludge treatment wastewater treatment (HJ 577-2010)
V. Membrane separation method technical specification for sewage treatment engineering (HJ 579-2010)
6. Technical Specifications for Oily Wastewater Treatment Engineering (HJ 580-2010)
The above standards have been implemented since January 1,.2011 and published by the China Environmental Science Press. The standard content can be found on the website of the Ministry of Environmental Protection.
Special announcement.
October 12,.2010
Content
Foreword..iv
1 Scope..1
2 Normative references..1
3 Terms and definitions. 2
4 General requirements..3
5 Design flow and design water quality 3
6 Process Design..5
7 main equipment 14
8 Detection and Control..15
9 electrical..16
10 Construction and acceptance 17
11 Operation and maintenance 19
Appendix A (Normative Appendix) Main Process Types of Oxidation Ditch Activated Sludge Process..22
Appendix B (informative) Other types of deformation processes for the oxidation ditch activated sludge process. 25
Iv
Foreword
In order to implement the Law of the People's Republic of China on Prevention and Control of Water Pollution, prevent and control water pollution, improve environmental quality, and regulate the oxidation sludge activated sludge process.
This standard is formulated for use in wastewater treatment projects.
This standard specifies the process design, main equipment, detection and control, electrical and application of sewage treatment engineering using oxidation ditch activated sludge method.
Technical requirements for work and acceptance, operation and maintenance.
Appendix A of this standard is a normative appendix, and Appendix B is an informative appendix.
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), Anhui Guosheng Environmental Protection and Energy Saving Technology
Co., Ltd., Hunan Provincial Architectural Design Institute, Wuhan Wukong System Engineering Co., Ltd.
This standard was approved by the Ministry of Environmental Protection on October 12,.2010.
This standard has been implemented since January 1,.2011.
This standard is explained by the Ministry of Environmental Protection.
Oxidation ditch activated sludge method sewage treatment engineering technical specification
1 Scope of application
This standard specifies the process design, main equipment, detection and control, electrical and application of sewage treatment engineering using oxidation ditch activated sludge method.
Technical requirements for work and acceptance, operation and maintenance.
This standard is applicable to urban sewage and industrial wastewater treatment projects using the oxidation ditch activated sludge process, which can be used as environmental impact assessment, design,
Technical basis for construction, acceptance and operation and management after completion.
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 18599 General industrial solid waste storage and disposal site pollution control standards
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 10 kV 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 50352 General rules for civil building design
GB J 87 Industrial Enterprise Noise Control Design Specification
GB 50141 Water supply and drainage structure engineering construction and acceptance specification
GBZ 1 industrial enterprise design hygiene standard
GBZ 2 workplace occupational exposure limit
CJ/T 51 Standard for urban sewage quality inspection methods
CJJ 60 Urban Wastewater Treatment Plant Operation, Maintenance and Safety Technical Regulations
HJ/T 91 Surface Water and Wastewater Monitoring Technical Specifications
HJ/T 242 environmental protection product technical requirements belt press filter for sludge dewatering
HJ/T 247 Technical requirements for environmental protection products Vertical shaft mechanical surface aerator
HJ/T 259 environmental protection product technical requirements rotary brush aeration device
HJ/T 260 Environmental Protection Product Technical Requirements Blasting Submersible Aerator
HJ/T 279 environmental protection product technical requirements push flow submersible mixer
HJ/T 280 environmental protection product technical requirements rotary aerator
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)
“Administrative Measures for Environmental Protection Acceptance of Completion of Construction Projects” (State Environmental Protection Administration,.2001)
“Standards for the Construction of Urban Sewage Treatment Projects (Revised)” (Ministry of Construction, National Development and Reform Commission,.2001)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Oxidation ditch activated sludge process
Refers to the reaction tank is closed and non-terminal circulation flow channel arrangement, the pool is equipped with oxygenated and push water flow equipment activated sludge method sewage treatment
law. The main processes include single-slot oxidation ditch, double-slot oxidation ditch, three-slot oxidation ditch, vertical axis aerator oxidation ditch and concentric circular centripetal oxidation ditch.
The deformation process includes an integrated oxidation ditch and a microporous aeration oxidation ditch.
3.2
Aerobic zone (pool) oxic zone
Refers to the oxygenation zone (pool) of the oxidation ditch. The dissolved oxygen concentration is generally not less than 2 mg/L. The main function is to degrade organic matter, nitrated ammonia and
The amount of phosphorus is taken.
3.3
Anoxic zone
Refers to the non-oxygenation zone (pool) of the oxidation ditch. The dissolved oxygen concentration is generally 0.2-0.5 mg/L. The main function is to carry out denitrification and denitrification.
3.4
Anaerobic zone (pool) anaerobic zone
Refers to the non-oxygenated zone (pool) of the oxidation ditch. The dissolved oxygen concentration is generally less than 0.2 mg/L. The main function is to release phosphorus.
3.5
Mechanical surface aerator mechanical surface aerator
Refers to a device for aeration using an impeller or a rotating brush (disc) provided on the surface of the aeration tank, including a vertical shaft type mechanical surface aerator and a turntable
Surface aeration device, rotating surface aeration device, etc.
3.6
Mixer mixer
Refers to a device with a propeller blade of less than 1 m and a medium-high rotational speed (generally greater than 300 r/min) to make the medium evenly stirred.
3.7
Pusher flowmaker
Refers to the device that the propeller blade is larger than 1 m and the rotational speed is low (generally less than 100 r/min).
3.8
Pretreatment
Refers to the treatment measures set in front of the oxidation ditch when the influent water quality can meet the biochemical needs of the oxidation ditch. Such as grilles, grit chambers, etc.
3.9
Preprocessing
Refers to the treatment process set in front of the oxidation ditch according to the need to adjust the water quality when the influent water quality cannot meet the biochemical needs of the oxidation ditch. As early as
Sinking pool, hydrolysis acidification tank, air flotation tank, homogenization tank, accident pool, etc.
3.10
Internal return gate
Refers to the unique structure of some ditch types of the oxidation ditch system, which can make the mixed liquid from the aerobic zone (pool) to the anoxic zone (pool) to achieve the powerless return.
Roads and equipment.
3.11
Standard state
It refers to a state where the atmospheric pressure is 101 325 Pa and the temperature is 293.15 K.
4 General requirements
4.1 Oxidation ditch should be used in the urban sewage treatment projects of Class II～V as specified in the “Construction Standards for Urban Sewage Treatment Projects (Revised)”.
And the industrial wastewater treatment project with organic load equivalent to such urban sewage.
4.2 The oxidation ditch sewage treatment plant (station) shall comply with the following regulations.
1) The site selection and overall layout of the sewage treatment plant shall comply with the relevant provisions of GB 50014. The general plan design should comply with the rules of GB 50187
set.
2) 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.
3) The fire protection design of the sewage treatment plant (station) building shall comply with the provisions of GB 50016 and GB 50222.
4) The storage yard for sludge and medicines deposited by the sewage treatment plant (station) shall comply with the provisions of GB 18599.
5) Treatment and discharge of waste gas, waste water, waste residue and other pollutants generated during the construction and operation of sewage treatment plants (station) shall be
Implement the relevant provisions of the current national environmental protection laws and standards to prevent secondary pollution.
6) The design and construction of the sewage treatment plant (station) should adopt effective sound insulation, noise reduction, greening and other measures to reduce noise, noise and vibration.
The design of the dynamic control shall comply with the provisions of GB J 87 and GB 50040. The noise inside and outside the equipment room shall comply with GBZ 2 and GB 3096 respectively.
It is stipulated that the environmental noise emission at the boundary of the plant shall comply with the provisions of GB 12348.
7) Occupational health and labor safety should be emphasized in the design, construction and operation of sewage treatment plants (station), and GBZ 1 should be strictly implemented.
The provisions of GBZ 2 and GB 12801. At the same time that the oxidation ditch is completed and operated, safety and sanitation facilities should be completed and operated at the same time, and corresponding
Operating procedures.
4.3 The sewage treatment plant (station) shall install an online monitoring system in accordance with the provisions of GB 18918. Other sewage treatment works shall be in accordance with the state or
Environmental protection management requires 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 and HJ/T 354.
And HJ/T 355 regulations.
5 Design flow and design water quality
5.1 Design Flow
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).
Dr d mQ QQ= (1)
Where. - Design flow of dry sewage, L/s; drQ
dQ -- integrated domestic sewage design flow, L/s;
mQ -- industrial wastewater design flow rate, L/s.
5.1.1.2 The design flow rate of urban combined sewage should be calculated according to formula (2).
Dr sQ QQ= (2)
Where. 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 comprehensive domestic sewage quota, and the integrated domestic sewage quota shall be
According to the local water quota, combined with the level of the internal drainage and drainage facilities in the building and the popularity of the drainage system, it can be used according to local conditions.
80% to 90% of the water quota is designed.
5.1.1.4 The total coefficient of change of the integrated domestic sewage volume shall be determined based on the measured data of the actual change of the local integrated domestic sewage, and no determination is made.
When the data is available, it can be valued according to the relevant provisions of GB 50014, as shown in Table 1.
Table 1 Total coefficient of variation of integrated domestic sewage
Average daily flow/(L/s) 5 15 40 70 100.200 500 ≥ 1 000
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 rate of industrial wastewater discharged into the municipal pipe network shall be based on the discharge of industrial pollution source wastewater within the coverage of urban municipal drainage system.
Statistical survey data is determined.
5.1.1.6 The design flow of rainwater is determined by reference to the relevant sections 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.
5.1.2 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. Test method should be consistent
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 the same industry.
The scale is determined analogously to the existing plant drainage data for the process.
5.1.2.4 When industrial wastewater and domestic sewage are combined, the amount of domestic sewage and bathing water in the factory or industrial park is determined.
Should comply with the relevant provisions of GB 50015.
5.1.2.5 The design flow of the centralized sewage treatment plant in the industrial park can be determined by reference to the method for determining the design flow of urban sewage.
5.1.3 Design flow of different structures
5.1.3.1 Lifting pump house, grid well and grit chamber should be calculated according to the design flow of combined sewage.
5.1.3.2 The primary sedimentation tank should be designed according to the dry sewage flow rate, and the combined flow design flow check should be carried out. The check time of the check should not be less than 30 min.
5.1.3.3 The reaction tank and the secondary sedimentation tank shall be calculated according to the amount of dry sewage, and a certain amount of combined water shall be considered if necessary.
5.1.3.4 Water conveyance facilities such as pipelines after the reaction tank shall be designed according to the maximum daily sewage flow rate.
5.2 Design water quality
5.2.1 The design water quality of urban sewage should be determined according to the actual survey data. The measurement method and data processing method should conform to HJ/T 91.
Provisions. When there is no survey data, the design can be converted according to the following criteria.
1) The five-day biochemical oxygen demand (BOD5) of domestic sewage is calculated as 25-50 g per person per day;
2) The amount of suspended solids in domestic sewage is calculated as 40-65 g per person per day;
3) The total nitrogen content of domestic sewage is calculated from 5 to 11 g per person per day;
4) The total phosphorus content of domestic sewage is calculated from 0.7 to 1.4 g per person per day.
5.2.2 The design water quality of industrial wastewater shall be determined according to the actual measured data of industrial wastewater entering the sewage treatment plant, and its determination method and
The data processing method shall comply with the provisions of HJ/T 91. When there is no actual measurement data, it can be determined by reference to the emission data analogy of similar factories.
5.2.3 The influent of the bioreactor should meet the following conditions.
1) the water temperature should be 12 ~ 35 ° C, the pH should be 6.0 ~ 9.0, the BOD5/CODCr value should be greater than 0.3;
2) When there is a requirement to remove ammonia nitrogen, the ratio of total alkalinity (calculated as CaCO3)/ammonia nitrogen (NH3-N) of influent should be greater than or equal to 7.14, dissatisfaction
The alkalinity should be added at the foot;
3) When there is a demand for total nitrogen removal, the BOD5/total nitrogen (TN) value of the influent should be greater than or equal to 4.0, the total alkalinity (calculated as CaCO3)/ammonia nitrogen value
It should be greater than or equal to 3.6. When it is not satisfied, it should be supplemented with carbon source or alkalinity;
4) When there is phosphorus removal requirement, the ratio of BOD5 to total phosphorus (TP) in the sewage should be greater than or equal to 17;
5) When it is required to simultaneously remove phosphorus and denitrification, it is desirable to meet the requirements of 3) and 4) at the same time.
5.3 Contaminant removal rate
The pollutant removal rate of the oxidation ditch can be calculated according to Table 2.
Table 2 Oxidation ditch pollutant removal rate
Sewage category main process
Contaminant removal rate /%
Suspended matter
(SS)
Five-day biochemical oxygen demand
(BOD5)
Chemical oxygen demand
(CODCr)
TN NH3-N TP
Urban sewage pre-treatment (pre-treatment) oxidation ditch, secondary sedimentation tank 70-90 80-95 80-90 55-85 85-95 50-75
Industrial wastewater pre-treatment (pre-treatment) oxidation ditch, secondary sedimentation tank 70 ~ 90 70 ~ 90 70 ~ 90 45 ~ 85 70 ~ 95 40 ~ 75
Note. According to the water quality, process flow, etc., the primary sedimentation tank may not be provided, and the secondary sedimentation tank may be set according to the groove type.
6 Process design
6.1 General requirements
6.1.1 When discharging water directly, it should meet the requirements of national or local emission standards; when it is discharged into the next-level processing unit, it should meet the next level.
The water intake requirements of the unit.
6.1.2 The flow state in the ditch shall be an overall mixed, partial push flow, and the influent amount is much lower than the circulating liquid mixture in the pool to form a dissolved oxygen (DO) ladder.
degree.
6.1.3 When the water quality and water volume change greatly, it is advisable to set up facilities to adjust water quality and water volume.
6.1.4 The sludge concentration in the ditch should be maintained at 2 000 ~ 4 500 mg/L.
6.1.5 The minimum flow velocity at the bottom of the ditch shall not be less than 0.3 m/s.
6.1.6 According to the requirements of nitrogen and phosphorus removal, separate anaerobic zone (pool) and anoxic zone (pool) can be set.
6.1.7 Process design should consider a flexible mode of operation.
6.1.8 Process design should take into account the effects of water temperature.
6.1.9 The oxidation ditch can be arranged in two or more groups, and the influent water distribution well should be set when multiple groups are arranged.
6.1.10 The design of the inlet pump house, grille, grit chamber, primary settling tank and secondary settling tank shall comply with the relevant provisions of GB 50014.
6.2 Pretreatment and pretreatment
6.2.1 A grid should be installed before the water inlet system, and a grit chamber should be set up for the urban sewage treatment project.
6.2.2 When the suspended solids (SS) is 1.5 times higher than the design value of BOD5, the primary sedimentation tank should be set before the biological reaction tank.
6.2.3 When the influent water quality does not meet the conditions specified in 5.2.3 or contains substances affecting biochemical treatment, appropriate water quality should be taken according to the influent water quality.
Pretreatment process.
6.3 Process
6.3.1 The following process should be adopted for the oxidation ditch.
Pre-water treatment or pretreatment of oxidation ditch secondary sedimentation tank
Sludge treatment system, excess sludge return sludge
Figure 1 Oxidation ditch process
6.3.2 Different trench types can be used according to factors such as site, water quality and water volume. The main process types are detailed in Appendix A.
Record B.
6.3.3 Single-slot oxidation ditch, double-slot oxidation ditch, vertical axis aerator oxidation ditch, concentric radial flow oxidation ditch, microporous aeration oxidation ditch should be separate
Set the second settling tank; the three-slot oxidation ditch should not be provided with a separate secondary settling tank. The design of the secondary settling tank shall comply with the provisions of GB 50014.
6.4 Pool capacity calculation and main design parameters
6.4.1 Removal of carbon source contaminants
6.4.1.1 When removing carbon source contaminants, the volume of the bioreactor can be calculated as follows.
1) Calculated according to sludge load.
Oe
twenty four ( )
QS SV
LX
−= (3)
2) Calculated according to sludge sludge age.
Co e24 ( )
1 000 (1 )
QY S SV
X Kv d cT
−= (4)
Xv=yX (5)
d d20 T( )
TK K θ −= ⋅ (6)
Where. V - the volume of the biological reaction tank, m3;
So--bioreactor inlet BOD5 mass concentration, mg/L;
Se--bioreactor effluent BOD5 mass concentration, mg/L, when the removal rate is greater than 90%, can be excluded;
Q--Design flow rate of biological reaction tank, m3/h;
X--the average mass concentration of mixed liquid suspended solids (MLSS) in the biological reaction tank, g/L;
Xv--the average mass concentration of mixed volatile solids (MLVSS) in the biological reaction tank, g/L;
Ls--BOD5 sludge load of bioreactor, kg/(kg·d);
Y--the ratio of MLVSS to MLSS in unit volume mixture, g/g;
Y--sludge yield coefficient (VSS/BOD5), kg/kg;
Θc--design sludge sludge age, d;
Attenuation coefficient at KdT--T°C, d−1;
The attenuation coefficient at Kd20--20 °C, d−1, should be 0.04～0.075;
T--design temperature, °C;
θT--temperature coefficient, should be taken from 1.02 to 1.06.
6.4.1.2 Oxidation ditch treatment of urban sewage or water quality similar to urban sewage industrial wastewater to remove carbon source pollutants, the main design parameters can be
The values specified in Table 3 are taken. When the difference between the quality of industrial wastewater and the quality of urban sewage is large, the design parameters should be tested or referenced to similar projects.
set.
Table 3 Main design parameters for removing carbon source pollutants
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