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HJ 2041-2014

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Detail Information of HJ 2041-2014; HJ2041-2014
Description (Translated English): Environmental Protection
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z23
Classification of International Standard: 13.060.40
Word Count Estimation: 18,193
Date of Issue: 6/10/2014
Date of Implementation: 9/1/2014
Quoted Standard: GB 12348; GB/T 12801; GB 50009; GB 50014; GB 50016; GB 50019; GB 50052; GB 50058; GB 50093; GB 50183; GB 50191; GB 50204; GB 50231; GB 50236; GB 50268; GB 50275; GB 50303; GB 50428; GB/T 50087; HJ/T 91; HJ/T 92; HJ/T 242; HJ/T 245; HJ/T 246; HJ/T 252; HJ/
Drafting Organization: China Environmental Protection Industry Association
Administrative Organization: ?Ministry of Environmental Protection Science, Technology
Regulation (derived from): Ministry of Environmental Protection Notice No. 42 of 2014
Issuing agency(ies): Ministry of Environmental Protection
Summary: This standard specifies the produced wastewater treatment project design, construction, inspection and operation management of technical requirements. This standard applies to the entire process oilfield waste water treatment project construction and oper

HJ 2041-2014
Technical specification for oilfield industry wastewater treatment
National Environmental Protection Standard of the People's Republic
Technical specification for oil recovery wastewater treatment engineering
2014-06-10 Approved.2014-09-01 Implementation
Ministry of Environmental Protection released
Content
Preface II
1 Scope.1
2 Normative references.1
3 Terms and Definitions 2
4 Contaminants and pollution loads 3
5 General requirements. 4
6 Process Design.6
7 Main process equipment and materials..9
8 Detection and Process Control..10
9 Major auxiliary works 11
10 Labor safety and occupational health.12
11 Construction and acceptance..12
12 Operation and maintenance..14
Foreword
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"
This standard is formulated for the construction and operation management of wastewater treatment projects, prevention of environmental pollution, protection of the environment and human health.
This standard specifies the technical requirements for the design, construction, acceptance and operation management of oil recovery wastewater treatment engineering.
This standard is a guidance document.
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, Sinopec Group Company Shengli Oilfield Branch
Oil Technology Research Institute, China University of Petroleum (East China).
This standard was approved by the Ministry of Environmental Protection on June 10,.2014.
This standard has been implemented since September 1,.2014.
This standard is explained by the Ministry of Environmental Protection.
Technical specification for oil recovery wastewater treatment engineering
1 Scope of application
This standard specifies the technical requirements for the design, construction, acceptance and operation management of oil recovery wastewater treatment engineering.
This standard is applicable to the whole process of construction and operation of oilfield wastewater treatment engineering, and can be used as environmental impact assessment of oil recovery wastewater treatment project.
The technical basis for the design and construction of price, environmental protection facilities, environmental protection acceptance of completed construction projects 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 12348 Environmental noise emission standards for industrial enterprises
General rules for safety and health requirements of GB 12801 production process
GB 50009 Building Structure Load Specification
GB 50014 Outdoor Drainage Design Code
GB 50016 Building Design Fire Code
GB 50019 Heating, Ventilation and Air Conditioning Design Code
GB 50052 design specification for power distribution system
GB 50058 Specification for design of electrical installations for explosion and fire hazard environments
GB 50093 automation instrument engineering construction and acceptance specification
GB 50183 Oil and gas engineering design fire protection specification
GB 50191 seismic design code for structures
GB 50204 Concrete Structure Engineering Construction Quality Acceptance Specification
General specification for construction and acceptance of GB 50231 mechanical equipment installation engineering
GB 50236 Field equipment, industrial pipeline welding engineering construction and acceptance specifications
GB 50268 Water supply and drainage pipeline engineering construction and acceptance specifications
GB 50275 Compressor, fan, pump installation engineering construction and acceptance specifications
GB 50303 Building electrical engineering construction quality acceptance specification
GB 50428 Oilfield Produced Water Treatment Design Specification
GB J 87 Industrial Enterprise Noise Control Design Specification
HJ/T 9 Surface Water and Wastewater Monitoring Technical Specifications
HJ/T 92 Water Pollutant Total Monitoring Technical Specification
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 252 environmental protection product technical requirements, microporous aerator
HJ/T 260 Environmental Protection Product Technical Requirements Blasting Submersible Aerator
HJ/T 263 Environmental Protection Product Technical Requirements Jet 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 336 Environmental Protection Product Technical Requirements Submersible Sewage Pump
HJ/T 337 Environmental Protection Products Technical Requirements Biological Contact Oxidation Complete Set
HJ/T 369 Environmental Protection Product Technical Requirements Dosing Device for Water Treatment
HJ/T 493 Technical Regulations for Preservation and Management of Water Samples
HJ 576 Anaerobic-anoxic-aerobic activated sludge process wastewater treatment engineering technical specification
HJ 577 Sequencing Batch Activated Sludge Wastewater Treatment Engineering Technical Specification
HJ .2006 Technical Specifications for Sewage Coagulation and Flocculation Treatment Engineering
HJ .2007 air floatation engineering technical specification
HJ .2008 sewage filtration treatment engineering technical specification
HJ .2009 Biological Contact Oxidation Wastewater Treatment Engineering Technical Specification
HJ .2010 Membrane Biological Wastewater Treatment Engineering Technical Specification
SY/J 4039 Basic terminology for petroleum engineering construction
SY/T 0048 Oil and Gas Engineering General Drawing Design Specification
SY/T 0049 Oilfield Ground Construction Planning Specification Design
SY/T 5329 recommended index and analysis method for water injection quality in clastic reservoir
SY/T 6276 Oil, Gas and Industrial Industry Health, Safety and Environmental Management System
Design code for CECS 111 sewage activated sludge treatment in cold regions
Measures for Completion and Acceptance of Construction Projects (Engineering) (National Planning Commission Construction [1990] No. 1215)
Measures for the Administration of Environmental Protection Acceptance for Completion of Construction Projects (State Environmental Protection Administration Order.2001 No. 13)
Measures for the Automatic Monitoring and Control of Pollution Sources (State Environmental Protection Administration Order No. 28,.2005)
3 Terms and definitions
The following terms and definitions established by GB 50428 and SY/J 4039 apply to this standard.
3.1 oilfield produced water
The water containing crude oil produced during the oilfield exploitation process can be re-injected into the oil layer as an oil displacing agent after being purified, which is a water source for water injection.
one.
3.2 produced water treatment system produced water treatment system
Produce water from oil fields through a series of water treatment facilities (including a small amount of well washing, downhole working wastewater, and backwashing line of produced water treatment equipment)
Water, etc.) is purified to meet the water quality requirements for production refilling, process remixing or other uses.
3.3 Oil production wastewater oilfield discharge wastewater
In the process of oilfield oil recovery, in addition to production water such as reinjection, process remixing or other uses, wastewater discharged from the bank is required.
3.4 biochemical treatment
After biochemical treatment, the process of removing contaminants is further removed.
4 Contaminants and pollution loads
4.1 Source of oil production wastewater
The source of oil production wastewater is shown in Figure 1.
Figure 1 Source of oil production wastewater
4.2 Wastewater volume
4.2.1 The amount of oil production wastewater is related to the degree of oilfield development, process, scale, activity of edge and bottom water, and ratio of injection to production.
4.2.2 The amount of wastewater should be based on the measured data; if there is no measured data, it can be compared with the existing development level, production scale and same type of oil production.
The amount of water discharged from the process oil field determines the amount of wastewater discharged.
4.2.3 When there is no analog data, the amount of wastewater can be calculated as follows.
In the formula.
Q--Oil production wastewater volume (m3/h)
Qi--The amount of water treated by the produced water treatment system (m3/h)
Q1--The amount of refill water used for production (m3/h)
Q2--Production water volume for other uses such as process water mixing (m3/h)
4.3 Wastewater quality
4.3.1 Oil production wastewater quality and oilfield geological conditions, development process, oil layer transformation measures, water injection quality and treatment process of produced water treatment system
And processing efficiency and so on.
4.3.2 The quality of oil production wastewater should be combined with oilfield water quality production data, changes and future production and development planning, etc., and according to the site.
The statistical data of the sampling test is comprehensively determined. The sampling point should be set at the outlet of the produced water treatment system.
4.3.3 Sampling and testing of oil production wastewater shall comply with the requirements of HJ/T 91 and HJ/T 92. The analysis of each water quality index is based on HJ/T 91, SY/T 5329
And other related requirements are implemented.
4.3.4 When there is no measured data, the water quality index of the oil production wastewater can be referred to Table 1.
Table 1 Water quality indicators of oil production wastewater
Contaminant index pH
Petro
Mg/L
Cod
(CODCr)mg/L
Biochemical oxygen demand
(BOD5)mg/L
polymer
Mg/L
Ammonia nitrogen
Mg/L
Suspended matter
(SS)mg/L
Concentration range 6.5 to 8.5 20 to.200 100 to 800 50 to 150 0 to.200 6 to 80 10 to 150
4.4 Design water quantity and design water quality
The design water quantity and design water quality should be determined according to the overall production, development planning and actual production situation of the oilfield, combined with the actual measurement data.
The design value of water quantity and water quality should increase the design margin of 15% to 30% of the original value of pollution load.
5 General requirements
5.1 General provisions
5.1.1 The design and construction of the oil recovery wastewater treatment project shall comply with the provisions of this standard and the environmental impact assessment approval documents, and shall also comply with the country.
The basic construction procedures and the relevant standards, norms and planning regulations.
5.1.2 Oilfield enterprises should actively adopt energy-saving emission reduction and clean production technologies to control the generation of pollutants from the source and reduce the pollution load.
5.1.3 Waste water generated from washing and downhole operations, such as waste liquid and heavy oil steam injection boilers, shall be collected.
In the facilities with anti-seepage measures, after preliminary treatment, they are transported to the produced water treatment system for centralized treatment.
5.1.4 The detection and maintenance of oil production wells, oil and gas gathering and transportation facilities should be strengthened to prevent oil and water leakage. Should respond to production emergencies
Wastewater collection system, accidental leakage of sewage should be collected and transported to the produced water treatment system for centralized treatment.
5.1.5 The design of oil production wastewater treatment engineering should give priority to the treatment process with high treatment efficiency, low energy consumption and low investment, and should ensure the oil production wastewater.
The processing facility is stable, reliable, and easy to operate and maintain.
5.1.6 During the construction and operation of the oil production wastewater treatment project, measures to prevent secondary pollution shall be taken. The treatment and disposal of malodor and solid waste shall be
In line with the relevant national standards.
5.1.7 The noise of the oil production wastewater treatment plant (station) shall comply with the provisions of GB 12348, and the control of the internal noise source of the building shall comply with GB J 8
Relevant provisions in the middle.
5.1.8 The oil production wastewater treatment plant (station) shall set up standardized sewage outlets in accordance with relevant national and local regulations. The total discharge of wastewater should be in accordance with the
The online monitoring system is installed in the provisions of the Automatic Monitoring and Management Measures for Dyeing Sources.
5.2 Construction scale
5.2.1 The construction scale of the oil recovery wastewater treatment project shall be based on the actual external drainage during the oilfield development process within the scope of the wastewater treatment plant (station) service.
The amount, concentration of pollutants and expected changes are comprehensively determined.
5.2.2 The construction scale of each structure of the oil production wastewater treatment project is calculated according to the maximum daily flow rate under normal conditions, and the sludge treatment and disposal system
The construction scale is calculated based on the average daily flow.
5.3 Engineering composition
5.3.1 The oil production wastewater treatment project mainly includes. main wastewater treatment project, auxiliary engineering and supporting facilities.
5.3.2 Main treatment of oil production wastewater treatment includes. pretreatment unit, anaerobic biological treatment unit, aerobic biological treatment unit, biochemical post treatment
Unit, sludge treatment and disposal unit and emergency response treatment.
5.3.3 Auxiliary works include. roads in the plant (station) area, water supply and drainage and fire protection, monitoring and measurement and measurement, heating, ventilation and air conditioning, electrical automation
And other facilities.
5.3.4 Supporting facilities include. office, lounge, dining hall, bathroom, etc.
5.4 Project site selection and general layout
5.4.1 The location of the oil recovery wastewater treatment project should meet the following requirements.
a) should meet the planning requirements and have good engineering geological conditions;
b) should be close to the oilfield operation area to facilitate wastewater collection;
c) The area of the site should meet the needs of the general layout; according to the overall planning requirements, the expansion land can be reserved appropriately;
d) The site should have reliable water supply, drainage, power supply and communication conditions, which is convenient for construction, maintenance and management;
e) The choice of site should also comply with the relevant provisions of SY/T 0048.
5.4.2 The layout of the oil production wastewater treatment plant (station) shall meet the requirements of the functions and process flow of each treatment unit; the construction (structure)
The spacing of the application should be compact and reasonable, and meet the requirements of construction and installation; all kinds of pipeline connections should be simple, and the installation should be convenient for maintenance management.
5.4.3 The oil production wastewater treatment plant (station) should be reasonably arranged to exceed the pipeline and repair the venting facilities.
5.4.4 The vertical design of the buildings (constructions) and facilities of the oil production wastewater treatment plant (station) should make full use of the topography and geological conditions in order to achieve
Good drainage of wastewater, earth balance and reduced energy consumption.
5.4.5 The oil production wastewater treatment plant (station) shall be provided with fixed places for stacking materials, chemicals, sludge, etc. as required, and shall not be stacked in the open air.
Temporary storage sites for sludge and structures of various treatment units shall adopt corresponding measures such as anti-corrosion and anti-seepage.
5.4.6 The oil recovery wastewater treatment plant (station) can be properly greened or set up according to the site conditions.
5.4.7 Facilities that require fire prevention and explosion protection, such as biogas utilization, should be installed in relatively independent areas and consider a certain distance of protection.
5.4.8 The wall setting of the oil production wastewater treatment plant (station) shall be determined according to the specific conditions, and the height of the surrounding wall shall not be less than 2m.
5.4.9 The size of the gate of the oil production wastewater treatment plant (station) should meet the maximum equipment entry and exit requirements, and set up waste residue, sludge, and chemical transportation doors.
6 Process design
6.1 Process selection principle
6.1.1 The selection of process routes and unit technologies for oil production wastewater treatment should aim at continuous and stable discharge standards, and respond to wastewater quality and quantity.
Comprehensive investigation and necessary analysis and testing, and comprehensive consideration of environmental impact assessment approval requirements, emission standards requirements and
Factors such as rationality, applicability, economy and control level of the treatment process are determined through on-site pilot test.
6.1.2 The oil recovery wastewater treatment project shall adopt a comprehensive treatment process combining biological treatment with physical and chemical treatment.
6.1.3 Engineering design should consider the salt content of the oil production wastewater, the polymer content and the chemical reagents for oil recovery, etc.
The impact of processing efficiency.
6.2 Process
6.2.1 The oil production wastewater should adopt the basic process flow shown in Figure 2.
Figure 2 Process diagram of oil production wastewater treatment
6.2.2 Pretreatment of oil production wastewater includes treatment units such as cooling, oil separation, conditioning, coagulation/(air flotation) precipitation, and the selection and group of treatment units
The combination should be determined according to the water quality characteristics of the oil production wastewater and the requirements for facility construction.
6.2.3 Anaerobic biological treatment of oil production wastewater should adopt hydrolytic acidification method, anaerobic biochemical pool can also be used; aerobic biological treatment should use biological contact
Oxidation method, conventional activated sludge method or membrane bioreactor (MBR).
6.2.4 The biochemical post-treatment of oil production wastewater should adopt micro-flocculation-filtration, chemical oxidation and other treatment processes.
6.2.5 The treatment efficiency of oil production wastewater should be determined by experiment. The pollutant removal efficiency of each treatment unit can be referred to Table 2.
Table 2 Pollutant removal efficiency of treatment unit (station) in oil recovery wastewater treatment plant
Pollutant removal efficiency (%) treatment
unit
Main process steps
CODCr SS Ammonia Nitrogen Petroleum
Natural precipitation, oil separation, precipitation 10~20 20~40 - 10~35
Coagulation and sedimentation, oil separation, regulation, coagulation and sedimentation 25~60 40~70 - 30~60 pretreatment
Coagulation air floating oil separation, regulation, coagulation air flotation 25~60 40~80 - 30~60
Anaerobic biochemical anaerobic biochemical pool 15~40 20~45 -- 30~60 Anaerobic
Treatment, hydrolysis, acidification, hydrolysis, acidification, 15~40 20~45 -- 30~60
Activated sludge activated sludge biological reaction tank, sedimentation tank 65~90 60~90 50~86 80~96 Aerobic
Biological treatment of biofilm biological contact oxidation 65~90 60~90 50~86 80~96
Membrane bioreactor membrane bioreactor 65~90 60~92 70~95 80~96
Filter micro-flocculation, filtration 10~20 50~60 - >30
Coagulation and coagulation, sedimentation, filtration 15~30 50~70 - >30
After biochemistry
deal with
Adsorption of activated carbon adsorption >40 >80 - >70
6.3 main processing unit
6.3.1 Pretreatment
6.3.1.1 Cooling treatment
a) The oil production wastewater with high water temperature should be equipped with a cooling treatment device and set up real-time monitoring;
b) The cooling treatment device should adopt the methods of heat exchange cooling and cooling tower cooling.
6.3.1.2 Oil separation treatment
The grease trap (tank) should be designed to meet the following technical requirements and requirements.
a) The effective volume of the grease trap (tank) should be determined according to the change of water quality and water volume, and the effective residence time should be 2h~8h;
b) The grease trap (tank) shall be designed to be closed, and shall be provided with ventilation facilities and treatment facilities for the escape of high temperature oil production wastewater;
c) The grease trap (tank) shall be provided with crude oil recovery and bottom sludge discharge device.
6.3.1.3 Wastewater treatment
When the quality and quantity of oil production wastewater change greatly, and the biochemical treatment unit has weak resistance to impact load, a regulating tank should be set. Wastewater regulation
The design of the pool should meet the following technical conditions and requirements.
a) The oil production wastewater adjustment tank shall have the functions of homogenization, average, pH adjustment, precipitation prevention, and supplemental nutrient salt;
b) The hydraulic retention time of the adjustment tank should be 10h-24h;
c) The wastewater conditioning tank shall be provided with means for removing scum and sludge;
d) A hydraulic mixing or mechanical agitation device should be provided in the adjustment tank. When using air agitation, it is recommended to take 3 m3/(m2·h) according to the aeration intensity.
4.5 m3/(m2·h); when mechanical agitation is used, the power should be 4 W/m3 to 8 W/m3.
6.3.1.4 Coagulation-precipitation/air floatation treatment
When the oil-containing wastewater contains polymer or heavy oil wastewater with small oil-water density difference, it is advisable to adopt “coagulation-precipitation/air flotation” treatment process.
The following technical conditions and requirements should be met.
a) When using a water treatment agent, it is generally necessary to provide a coagulation reaction zone. The mixing and reaction of water treatment chemicals and wastewater should be mechanically stirred.
Or hydraulic stirring method, the reaction time is related to the nature of the wastewater, the type of the agent, the dosage and the reaction form, etc., generally 15 min~
30 min;
b) When using the coagulation sedimentation process, the G value of the mixing zone is 300 s-1 to 600 s-1, the mixing time is 30 s to 120 s, and the G value of the reaction zone is 30 s-1.
~60s-1, reaction time 5 min ~ 20min, surface loading of sedimentation tank 0.6 m3/(m2 · h) ~ 1.2m3/(m2 · h);
c) When using the coagulation air flotation process, the air flotation treatment should adopt dissolved air flotation, vortex air flotation or jet air flotation. Air float water intake should be small
At 100 mg/L. The scum generated by the air floatation treatment should be mechanically cleaned. The driving speed of the scraper should be controlled from 1 m/min to 5 m/min;
d) Other process designs should meet the relevant technical requirements of HJ .2007.
6.3.2 Anaerobic biological treatment
6.3.2.1 Anaerobic biological treatment should control the water temperature. 30 ° C ~ 40 ° C in winter, 25 ° C ~ 40 ° C in summer.
6.3.2.2 The pH of the influent in the anaerobic biological treatment system should be 6.5-7.5, the petroleum should be less than 20 mg/L, and the sulfate concentration should be less than
1000mg/L.
6.3.2.3 After the anaerobic biological treatment, the sedimentation tank can be set, and the residence time should be 1.5 h to 3.0 h.
6.3.2.4 Anaerobic biological treatment should be carried out by hydrolytic acidification method or anaerobic biochemical tank. The relevant parameters should be determined by experiment.
6.3.2.5 Anaerobic biological treatment should avoid methanogenesis, and methane production can be suppressed by adjusting the oxidation-reduction potential above -300 mV.
6.3.2.6 When using the hydrolysis acidification method, the following technical requirements shall be met.
a) The CODcr of the influent acidification tank should be less than 1000 mg/L.
b) The volumetric load of the hydrolysis acidification tank should be 0.7 kgCOD/(m3·d) to 2.0 kgCOD/(m3·d). The residence time can be designed to be 6 h~
12 h;
c) A submersible mixer should be installed at the bottom of the hydrolysis acidification tank to prevent sludge sedimentation. The mixing power of the submersible mixer should be 2 W/m3~
4W/m3;
d) The water distribution system should be filled with water from the bottom, and uniform water distribution should be ensured, and the rising flow rate of the wastewater should be less than 2.5 m/h;
e) the effective water depth of the hydrolysis acidification tank should be 4.0 m to 6.0 m;
f) the ratio of the pool width of the hydrolysis acidification tank to the effective water depth should be 1.1 to 2.1;
g) The surface load of the sedimentation tank after hydrolysis and acidification should be 0.5 m3/(m2·h) to 1.5 m3/(m2·h).
6.3.3 Aerobic biological treatment
6.3.3.1 The influent CODcr of the aerobic biological treatment system shall not exceed 500 mg/L.
6.3.3.2 When using the traditional activated sludge method, the sludge load should be 0.05 kgBOD5/(kg MLSS·d)~0.20 kgBOD5/(kg MLSS·d)
The sludge concentration should be 2 g/L to 4 g/L. When using A2O, SBR or MBR, the process design should conform to HJ 576 and HJ 577, respectively.
HJ .2010 regulations. When the sewage treatment facility is located in a cold area, it should also comply with CECS 111.
6.3.3.3 When using biological contact oxidation, the technical requirements are as follows.
a) High-performance biofilm filler with excellent performance should be selected, and the bracket for fixing biofilm filler should meet the anti-corrosion requirements;
b) The volumetric load should be determined according to the actual operational data of the test or similar wastewater treatment. When there is no data, 0.3 kg COD/ should be used.
(m3·d) ~ 1.5 kgCOD/(m3 · d), and check according to the hydraulic retention time;
c) The aerobic tank should maintain sufficient oxygenation and aeration, and the dissolved oxygen should be 2.0 mg/L to 4.0 mg/L;
d) Other process designs shall comply with the technical requirements of HJ/T 337 and HJ .2009.
6.3.3.4 The aeration tank should be considered to have a defoaming facility. It is advisable to increase the aeration tank to super high, add defoaming agent, spray defoaming and mechanical defoaming.
Shi.
6.3.4 Biochemical post treatment
6.3.4.1 The biochemical post-treatment process of oil production wastewater may adopt micro-flocculation-filtration, coagulation-precipitation/air flotation-filtration process, process selection and
The unit process parameters shall be determined according to the water quality and water quantity, and the treatment process test shall be carried out after technical and economic comparison.
6.3.4.2 Relevant process design can refer to relevant standards such as HJ .2006, HJ .2007 and HJ .2008.
6.3.4.3 When there are more stringent emission requirements, one of the other biochemical post-processing unit technologies may be selected through test verification and technical and economic analysis.
Or several combinations, other unit technologies include chemical oxidation treatment, adsorption, activated carbon biofilter, ultrafiltration, nanofiltration, reverse osmosis, and the like.
6.4 Sludge treatment unit
6.4.1 The amount of sludge generated should be calculated according to the process conditions. Biochemical sludge production should be based on biological treatment process, organic matter concentration, and mud production coefficient.
Such calculations, when there is a lack of data, can be calculated according to the aerobic mud production coefficient of 0.3 kgDS/kg BOD5 ~ 0.7 kgDS/kg BOD5 under normal circumstances;
The amount of materialized sludge should be calculated according to the treatment process, water volume, suspended solids concentration, and dosage of the chemical.
6.4.2 The sludge should be added and conditioned before sludge dewatering. The type and dosage of the drug to be administered should be based on the test or reference to the same type of sludge dewatering.
The data is determined, it is not appropriate to overdo it.
6.4.3 The type of sludge dewatering machine should be selected according to the nature of sludge, sludge production and dewatering requirements. The moisture content of dewatered sludge should be ≤80%.
6.4.4 Dewatered sludge shall be disposed of in a harmless manner in accordance with the relevant provisions of the national solid waste disposal.
6.5 malodor control
6.5.1 The source of malodorous pollution should be effectively controlled and meet the following technical requirements.
a) The process unit design should be optimized to reduce the generation and spread of odors in the wastewater collection and treatment system;
b) Contaminants such as scum and sludge generated during the process should be cleaned regularly.
6.5.2 The odor should be collected and treated and meet the following technical requirements.
a) Take measures such as sealing, partial isolation and vacuum suction to collect the process (regulating tank, hydrolysis tank, sludge dewatering machine, etc.)
Odor generated in the middle;
b) Ventilation or odor collection facilities should be provided in the sewage pumping station, dosing room, etc., and ensure that the exhaust gas meets the requirements of relevant standards.
6.5.3 It is advisable to use physical, biological, chemical deodorization and other processes to treat the collected odor. The oil recovery wastewater treatment project should use biological filtration to deodorize.
Adsorption deodorization and other processes.
7 Main process equipment and materials
7.1 Aeration equipment
7.1.1 Products with high oxygen utilization rate, good mixing effect, stable and reliable operation, low resistance loss, easy installation and maintenance should be selected.
7.1.2 The influence of corrosion and scaling of oil production wastewater on the efficiency and operational stability of aeration equipment should be considered.
7.1.3 The specific requirements for the selection of aeration equipment are as follows.
a) The medium and microporous aerators shall comply with the provisions of HJ/T 252;
b) The jet aerator shall comply with the provisions of HJ/T 263;
c) blast-type submersible aerators shall comply with the provisions of HJ/T 260;
7.2 Sludge treatment equipment
7.2.1 The box filter press and plate and frame filter press for sludge dewatering shall comply with the provisions of HJ/T 283.
7.2.2 Belt press filters for sludge dewatering shall comply with HJ/T 242.
7.2.3 Sludge concentration belt dewatering machine shall comply with the provisions of HJ/T 335.
7.3 Dosing equipment
Dosing equipment should comply with HJ/T 369.
7.4 pump
Submersible sewage pumps shall comply with HJ/T 336.
7.5 Filler
7.5.1 Biofilm fillers should be preferred for products with high technical performance and long service life.
7.5.2 Suspended packing shall comply with HJ/T 245 and suspended packing shall comply with HJ/T 246.
7.6 Other equipment and materials
Other machinery, equipment and materials shall comply with national or industry standards.
8 Detection and process control
8.1 Testing
8.1.1 Water metering, water quality monitoring, water level observation, sampling and detection shall be set according to the requirements of process control of oil production wastewater treatment plant (station).
Instruments and instruments for testing and drug metering.
8.1.2 Online detection device for providing data for closed-loop control and performance assessment of oil recovery wastewater treatment project, the detection points are set at
Within the controlled unit or at the inlet and outlet, the sampling frequency and monitoring items shall be determined according to the process control requirements.
8.1.3 The pretreatment system should detect inlet and outlet flow, pH, SS, CODcr, BOD5, ammonia nitrogen, total nitrogen, total phosphorus and other indicators.
8.1.4 Anaerobic treatment unit should detect the pH value of inlet and outlet, CODcr, BOD5, petroleum and temperature in the reactor, alkalinity, sludge
Indicators such as traits and sludge concentration.
8.1.5 The aerobic treatment unit should detect the pH of the inlet and outlet, SS, CODcr, BOD5, petroleum, ammonia, total nitrogen, total phosphorus, and
Indicators such as dissolved oxygen, sludge properties, and sludge concentration in the reaction cell.
8.1.6 The biochemical post-treatment unit should detect the outlet pH, SS, CODcr, BOD5, petroleum, volatile phenol, sulfide, ammonia nitrogen, total nitrogen,
Total phosphorus, total mercury, total cadmium, total chromium, hexavalent chromium, total arsenic, total lead, total nickel, total strontium, total silver, total alpha radioactivity, total beta radioactivity, etc.
Standard.
8.1.7 The relevant indicators should be measured in HJ/T 91, HJ/T ..
Related standard:   HJ 2051-2016  HJ 2047-2015
   
 
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