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HJ 2043-2014

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Detail Information of HJ 2043-2014; HJ2043-2014
Description (Translated English): Environmental Protection Industry Standard
Sector / Industry: Environmental Protection Industry Standard
Word Count Estimation: 19,142
Date of Issue: 10/24/2014
Date of Implementation: 1/1/2015
Drafting Organization: China Environmental Protection Industry Association
Administrative Organization: Ministry of Environmental Protection
Regulation (derived from): Ministry of Environmental Protection notice 2014 No. 67

HJ 2043-2014
Technical specificaions of starch industry wastewater treatment
HJ
People's Republic of China National Environmental Protection Standards
Starch Wastewater Treatment Project Technical Specifications
Technical specifications for starch industry wastewater treatment
Issued on:2014-10-24
2015-01-01 implementation
Issued by the Ministry of Environmental Protection
Table of Contents
Preface .ii
1. Scope ..1
2 Normative references ..1
3 Terms and definitions .3
4 of pollutants and pollution load .4
5 ..5 general requirements
6 Wastewater Treatment Process Design .7
7 main process equipment and materials .12
8 detection and process control 13
9 Main aided engineering .14
10 labor safety and occupational health ..15
11 16 Construction and Acceptance
Operation and maintenance 12 16
Foreword
For the implementation of the "People's Republic of China Environmental Protection Law", "People's Republic of China Water Pollution Prevention Law" and "starch industrial water
Pollutant emission standards "to regulate starch industry wastewater treatment project construction and operation, control environmental pollution, protect the environment and human health,
Development of this standard.
This standard is China's current emission standards and pollution control technology, provides for corn, wheat and potato as the
Production of raw materials and subsequent products of starch production wastewater treatment engineering design, construction, inspection and operation and maintenance and other technical requirements.
This standard is a guiding standard.
This standard is the first release.
This standard is developed by the Ministry of Environmental Protection Science, Technology organization.
This standard drafting units: China Environmental Protection Industry Association, Shandong ten Environmental Energy Limited.
This standard MEP October 24, 2014 for approval.
This standard since January 1, 2015 implementation.
The standard explanation by the Ministry of Environmental Protection.
Starch Wastewater Treatment Project Technical Specifications
1 Scope
This standard specifies the starch wastewater treatment project design, construction, inspection and operation and maintenance and other technical requirements.
This standard applies to wastewater treatment project starch and starch sugar production enterprises or production facilities can be used as environmental impact assessment, engineering
Consulting, after running the design, construction, completion and acceptance of environmental protection and management of the technical basis. Water quality at similar Starch Wastewater
Processing may be performed with reference to this standard.
2 Normative references
The standard content of the following documents cited in the articles. For undated references, the effective version applies to this standard.
GB/T 156 standard voltage
GB 3096 acoustic environment quality standards
GB 7251.1 Low-voltage switchgear and control equipment - Part 1: General
GB 7251.2 Low-voltage switchgear and control equipment Part 2: Particular requirements for busbar trunking systems (busways)
GB 7251.3 Low-voltage switchgear and control equipment - Part 3: Non-professionals can enter the venue of the opening and low voltage
Off and control equipment - Particular requirements for distribution boards
GB 7251.4 Low-voltage switchgear and control equipment - Part 4: Particular requirements for assemblies for construction equipment (ACS) of
GB 7251.5 Low-voltage switchgear and control equipment Part 5: The utility grid power distribution equipment to the special
GB 12348 industrial enterprises of environmental noise emission standard plant boundary
GB/T 12801 General requirements for the production process safety and health
GB 14554 standard malodorous emissions
GB 18599 general industrial solid waste storage and disposal site pollution control standards
GB/T 18883 indoor air quality standards
GB 25461 starch industrial water pollutant discharge standards
GB/T 50009 building structural load specifications
GB 50014 outdoor drainage design specifications
GB 50015 Water and Drainage Design Specification
GB 50016 architectural design code for fire protection
GB 50019 civil heating, ventilation and air conditioning design
GB 50033 architectural lighting design standards
GB 50037 Code for design of building ground
GB 50046 Code for anticorrosion design of industrial buildings
GB 50052 power supply and distribution system design specifications
GB 50053 20kV substation and below design specifications
GB 50054 low voltage power distribution design specifications
GB 50055 Universal power distribution equipment design specifications
GB 50057 Lightning in design
GB 50069 Water Supply and Drainage Structural design code
GB 50093 Automation Instrumentation Construction and Quality Acceptance
GB 50108 Technical code for waterproofing of underground works
GB 50116 automatic fire alarm system design specifications
GB 50168 electric equipment installation engineering construction and acceptance of cable lines
GB 50169 electric equipment installation engineering construction and acceptance of grounding devices
GB 50191 Code for seismic design of structures
GB 50194 engineering construction site for electrical safety norms
GB 50204 Construction Quality Acceptance of Concrete Structure Engineering
GB 50208 Underground Waterproof Engineering Quality Acceptance
GB 50222 interior decoration of buildings for fire protection design
GB 50231 mechanical equipment installation construction and acceptance of universal norms
GB 50236 field equipment, industrial pipe welding engineering for construction
GB 50243 Construction Quality Acceptance of Ventilation and Air Conditioning Engineering
GB 50254 electrical low-voltage electrical equipment installation engineering construction and acceptance
GB 50255 electric equipment installation engineering power converter equipment for construction and acceptance
GB 50256 electrical equipment installation engineering construction and acceptance of electric device
GB 50257 electrical equipment installation engineering explosion and fire hazard electrical equipment installation and acceptance
GB 50268 and drainage in construction and acceptance
GB 50275 fans, compressors, pumps, installation engineering construction and acceptance
GB/T 50334 municipal sewage treatment plant construction quality acceptance
GB 50335 Code for design of wastewater reclamation and reuse
GB 50395 video security monitoring systems engineering design specifications
GB J 87 Industrial Enterprise Noise Control Design Specification
GB J 115 industrial television systems engineering
GB J 141 water supply and drainage construction and acceptance of structures
GB Z 1 Design of Industrial Enterprises hygiene standards
HJ/T 91 surface water and wastewater monitoring technical specifications
HJ/T 242 environmental protection product sludge dewatering with belt filter press
HJ/T 245 environmental protection product hanging packing
HJ/T 246 environmental protection product filler suspension
HJ/T 247 environmental protection product vertical shaft mechanical surface aerator
HJ/T 251 environmental protection product Roots Blower
HJ/T 252 environmental protection product, the microporous aerator
HJ/T 259 environmental protection product brush aerator
HJ/T 260 environmental protection product blast submersible aerator
HJ/T 263 environmental protection product jet aerator
HJ/T 278 environmental protection product - high-speed single-stage centrifugal blower aeration
HJ/T 280 environmental protection product carousel aerator
HJ/T 281 environmental protection product diffuser aeration
HJ/T 283 environmental protection product and Van filter frame filter
HJ/T 335 environmental protection product with concentrated sludge dewatering machine
HJ/T 336 environmental protection product submersible sewage pump
HJ/T 369 environmental protection product used in water treatment dosing device
HJ 576 Anaerobic - anoxia - aerobic activated sludge wastewater treatment project technical specifications
HJ 577 sequencing batch activated sludge wastewater treatment project technical specifications
HJ 578 oxidation ditch activated sludge wastewater treatment project technical specifications
HJ 2013 upflow anaerobic sludge blanket reactor wastewater treatment engineering technical specifications
HJ 2023 anaerobic expanded granular sludge bed reactor wastewater treatment project technical specifications
Cold regions sewage activated sludge process design procedures CECS 111
CECS 112 oxidation ditch design procedures
"Project (Project) final acceptance approach" (State Planning Committee Building [1990] No. 1215)
"Outfall standardized remediation technical requirements" (trial) EM [1996] No. 470
"Acceptance of completed construction projects management" (2001 SEPA Order No. 13)
"Pollution automatic monitoring and management approach" (2005 SEPA Order No. 28)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1 starch wastewater starch industry wastewater
Wastewater refers to corn, wheat, or potato starch as raw material to produce starch starch sugar produced during each step
sum.
3.2 starch sugar starch-sugar wastewater wastewater
Starch as raw material, the sum of the waste water through the catalyst (enzyme or acid) and water to produce sugar produced during each step.
3.3 Starch Wastewater modified starch wasterwater
Starch as raw material, through physical and chemical processes with varying degrees of change in their physical and chemical properties of the preparation of modified starch production process
Total waste water generated in each step.
3.4 corn steep water corn steepwater
Means wastewater contains large amounts of soluble proteins, organic phosphorus and other substances in the production process of corn starch corn soaking process produced.
3.5 conveying washing wastewater conveying and cleaning wastewater
It refers to potato starch production process of raw materials, cleaning, transporting step that contains a large amount of sediment, suspended solids and other contaminants
Wastewater.
4 of pollutants and pollution load
4.1 Wastewater origin and category
4.1.1 corn starch as raw materials, mainly from corn steep water, germ separation and washing detergent fiber, flotation concentrate,
Drainage protein filter press etc. Section protein recovered after evaporation and condensation produced when corn soaking water recycling.
4.1.2 In the production of potato starch as raw materials, mainly from wastewater off juice, separation, dehydration and drainage station proteins recovered, as well as the original
Conveying washing wastewater.
4.1.3 wheat starch as raw materials, waste water consists of two parts: the settlement produced after centrifugation and the supernatant pond yellow Whey.
4.1.4 starch as raw materials to produce starch sugar, waste water mainly from the ion exchange column water wash, rinse water and wash water of various devices,
Liquefaction and saccharification process cooling water.
4.1.5 The main pollutants starch wastewater suspended solids (SS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonia (NH3-N),
Total Nitrogen (TN) and total phosphorus (TP).
4.2 Water Wastewater
4.2.1 Starch wastewater emissions of existing enterprises can determine by measuring, but also the actual conduct of tests to determine the water balance based on production. Wastewater discharge
When the measurement, respond to the various production processes of wastewater discharged one by one measure, and the total discharge port when the factory production facilities for integrated waste
Total water discharge actual measurement as the checking; measure should be consistent with HJ/T 91 technical requirements.
4.2.2 The new starch wastewater treatment project, the analogy discharge water similar to conventional production scale and the same kind of production process to determine the starch factory
Wastewater emissions.
4.2.3 When there is no measured data and reference materials similar enterprises refer to Table 1.
Table 1 Typical starch industry wastewater production per unit of product
Type of starch, corn starch, potato starch tapioca starch, wheat starch sugar starch wastewater
Advanced ≤3 ≤4 ≤4 ≤3 ≤2.5
The average ≤4 ≤8 ≤8 ≤4 ≤3
The amount of wastewater generated
(M3/t starch)
Usually ≤5 ≤12 ≤12 ≤5 ≤3.5
The product of the coefficient of variation and diurnal variation coefficient 4.2.4 Wastewater variation coefficient equal to the amount of water, when the variation coefficient of 1.3 to 1.6, diurnal variation system
Number of 1.1 to 1.3.
4.3 Water Wastewater
4.3.1 Quality of starch wastewater existing enterprise can be determined by assay sample can also be determined based on the actual production material balance. Sampling Tests
When the deal with the various production processes of wastewater discharged individually sampled and the total opening of the plant wastewater discharge as comprehensive wastewater sampling check;
Sample tests shall comply with HJ/T 91 technical requirements.
4.3.2 The new starch wastewater treatment project, the same analogy existing scale of production and the same kind of production process of starch production plant pollution data to determine
Wastewater quality.
4.3.3 When there is no measured data and reference materials similar enterprises can refer to Table 3.
Table 3 Typical water quality starch wastewater
raw material
Cod
CODCr
(Mg/L)
BOD
BOD5
(Mg/L)
Suspension
SS
(Mg/L)
TN
TN
(Mg/L)
Ammonia
NH3-N
(Mg/L)
TP
TP
(Mg/L)
pH value
Maize 150002400 6000 ~ 5000300 ~ 60001000 ~ ~ ~ 15 010 ~ 40 070 ~ 5 803
Potato 10000 ~ 250001500 600010000 ~ 55000400 ~ ~ ~ 600 200 300 <53 ~ 5
Cassava 100005000 ~ 6000 ~ 8000 3000 ~ 5000 100 ~ 200 50 ~ 80 <53 ~ 5
Wheat 110002500 7000 ~ 2500150 ~ 60001500 ~ ~ ~ 30050 1003 10030 ~ 5 ~
Starch sugar 3000 ~ 80001500 ~ 5000500 ~ 100040 ~ 7015 ~ 30 <53 ~ 10
5 general requirements
5.1 General provisions
5.1.1 Starch Wastewater Treatment should follow the "three simultaneous" system, carry out the whole process of thought control, the implementation of cleaner production, from the production process
Sources reduce emissions, improve resource and energy efficiency, control and reduce emissions of pollutants.
5.1.2 Starch wastewater should conform GB 25461, EIA approval document and total control requirements.
5.1.3 Starch wastewater treatment engineering solution should be based on business production and development plan as the basis, to implement the national industrial policy and industrial pollution
Transfection control technology policy, combined with different climate and other environmental factors, overall centralization and decentralization, existing and new (expanded, changed) to build relationships,
After determining technical and economic feasibility.
5.1.4 Starch Wastewater Treatment should give priority to high-efficiency, energy saving, investment saving treatment process, to ensure that wastewater treatment is provided
Shi stable, reliable, safe operation and easy operation and maintenance, reduce operating costs.
5.1.5 Starch Wastewater Treatment should take measures to prevent secondary pollution, ensure the treatment and disposal of solid waste and stench were in line with GB
14554 and GB 18599 requirements, and shall conform to the EIA approval document; treatment plant (station) bounded noise shall comply GB 3096 and GB 12348
The provisions of the building interior noise source control facility shall comply with the relevant provisions of 87 GB J.
5.1.6 Starch Wastewater Treatment should be in accordance with the provisions of "pollution automatic monitoring and management approach" to install pollutant online monitoring system.
5.1.7 should be according to "the sewage outfall remediation technical requirements" (trial) Construction of waste water discharge.
5.2 Construction Scale
5.2.1 Construction scale starch wastewater treatment project, the scale of production should be based on business accounting, and according to wastewater treatment engineering services within the scope
Available water, water quality and expected changes in the Integral; existing corporate governance project should be based on measured data, the new (expanded, changed)
Construction Enterprise governance project should analogy or material balance method to determine.
5.2.2 Starch wastewater collection system should be unified planning and construction of industrial enterprises based on starch, into the waste water treatment station should conduit section size
Press the maximum daily planned maximum flow design.
5.2.3 Construction scale wastewater treatment plant starch processing systems each addition to meeting the relevant design requirements, it must also meet the following requirements:
a) adjusting the wastewater treatment tank in front of the pool by the maximum daily maximum flow calculation;
b) adjusting tank and waste water treatment tank by the maximum daily flow calculation;
c) sludge treatment and disposal systems according to the average daily flow calculation;
d) back to the water treatment system is determined according to the reuse water quality and quantity.
5.3 project constitutes a
5.3.1 Starch wastewater treatment plant (station) of the project consists of the main project, supporting the engineering, production management and service facilities.
5.3.2 The main project includes wastewater treatment system, recycled water systems, sludge treatment and disposal system, odor treatment systems, biogas Lee
Use the system:
a) wastewater treatment system includes pretreatment, biological treatment and deep processing;
b) recycled water back to the water system include the storage, distribution and monitoring;
c) sludge treatment and disposal system includes a recycling anaerobic sludge and aerobic sludge homogenization, concentration, digestion, dehydration and final
Disposal;
d) stench processing system including the collection and processing of the stench;
e) biogas utilization system including the reservoir, as well as pre-treatment before use and biogas utilization of biogas.
5.3.3 supporting the automation project, including electrical, plumbing and fire protection, heating, ventilation and air conditioning, building structure, monitoring and metrology laboratory setting
CONSTRUCTION.
5.3.4 Production management and service facilities including office space, and so on duty.
5.3.5 Wastewater treatment plants (stations) should be set standardized outfall accordance with relevant state and local.
5.4 plant (station) Location
5.4.1 Starch Wastewater Treatment Project site selection should include starch production enterprises overall planning, environmental impact assessment and meet the approval of the file to
begging.
5.4.2 residential area or site planning and health protection from public buildings should perform the EIA approval document.
5.4.3 The site should be located as far as possible in the region below the factory production and living area in summer the prevailing wind direction.
5.4.4 If the enterprise starch factory area sloping terrain, sewage treatment plant (station) should be located in the lower reaches of the slope, the sewage can have gravity
can.
5.4.5 site selection should consider flood threat from flooding, and should comply with the relevant provisions of GB 50016 in fireproof.
5.5 General layout
5.5.1 treatment plant (station) should be based on the overall arrangement of the various structures and functions processing requirements, combined with the terrain, climate and geological conditions
Factors determined after technical and economic comparison, and should facilitate the construction, maintenance and management.
5.5.2 Each processing unit layout should seek compact and reasonable, to meet the construction, equipment installation, all types of pipeline connection is simple, maintenance management
Ease of use requirements, and leave room for development and equipment replacement.
5.5.3 The design should be routed beyond pipelines, storage and maintenance of the accident venting facilities, and to ensure that substandard water or sludge to give vent properly
Good treatment and disposal.
5.5.4 treatment plants (stations) may need to set the storage materials, pharmaceutical, sludge, waste and other places may not be open dumps, sludge
And storage yard waste should be treated and disposed sludge seepage reflux to adjust exudate collection line pool.
Vertical Design 5.5.5 processing unit should fully consider the use of existing topography and elevation, as possible earthwork balance, gravity drainage, reduce
Energy requirements.
5.5.6 When the treatment plant (station) construction staging, treatment plant (station) area shall be reserved for the size of the overall processing site, and overall
Arrangement. Pipeline network and underground structures should be built first.
5.5.7 treatment plant (station) should be set to produce an auxiliary building, and meet the treatment process and daily management needs, the area should be based on treatment plant
Binding (station) scale, process technology, management system and so determine the actual situation.
5.5.8 centralized treatment plant (station) is set depending on the specific needs to determine the wall, the wall height of not less than 2m.
5.5.9 centralized treatment plant (station) door size should meet the needs of the largest out of the device, and set up waste, chemicals Sinotrans side door.
6 Wastewater Treatment Process Design
6.1 General provisions
6.1.1 In the process design before, water quality, water quantity and variation response wastewater conduct a full investigation, and make the necessary analytical tests.
6.1.2 Starch wastewater treatment process should be integrated biological and physico-chemical treatment process of combining.
6.1.3 process route selection should be based on water quality characteristics of wastewater, treated water whereabouts, emissions standards, and technical and economic comparison after
determine.
6.1.4 should consider the local natural conditions and selection processes. High water table, poor geological conditions in place, the general structure depth should not be used
Larger, more difficult construction process.
6.2 Route Selection Process
6.2.1 should be based on existing national standards on emissions and local pollutant sources and nature of drainage whereabouts determine the extent of starch wastewater treatment,
Select the appropriate treatment process.
Should adopt "pretreatment anaerobic biological treatment depth aerobic biological treatment process" pollution control work 6.2.2 Starch wastewater treatment in general
Arts, process flow diagram shown in Figure 1. Type of raw material can be based on starch industrial starch production enterprises, product type, choose Properties wastewater
Suitable wastewater treatment process route and cell technology.
1 wastewater treatment process flow diagram
6.2.3 pretreatment process, the starch production wastewater should be through the grid, precipitation, flotation and other processes after the removal of suspended solids into the regulation pool, be
Water regulation; potato starch production wastewater facilities should be set up before the defoaming sedimentation tanks; potato starch wastewater cleaning waste material handling
After the sewage should be removed by sand settling and other processes into the conditioning tank.
6.2.4 anaerobic biological treatment can be used upflow anaerobic sludge blanket reactor (UASB), the anaerobic expanded granular sludge bed reactor (EGSB),
Internal circulation anaerobic reactor (IC) and other technology; wastewater entering the anaerobic reactor should be preceded pH adjustment and temperature adjustment; starch sugar,
And modified starch production wastewater need to adjust the dosing of nutrients N ratio after anaerobic bioreactor.
6.2.5 aerobic biological treatment can be used sequencing batch activated sludge (SBR), hypoxia - aerobic (A/O) secondary sedimentation tank, secondary sedimentation tank oxidation ditch
And other technology.
6.2.6 depth treatment choice coagulation sedimentation, sand filtration, membrane bioreactor (MBR) and other technology; based on water demand by nanofiltration,
Reuse of reverse osmosis treatment. Depending on the purpose of recycling, reuse optionally ultrafiltration, the ultrafiltration reverse osmosis (RO), ultrafiltration RO mixed
Bed ion exchanger technology.
6.2.7 can be used instead of MBR aerobic biological treatment (nitrogen and phosphorus) deep treatment, MBR can also be used as an advanced treatment process.
6.2.8 When using anaerobic ammonia oxidation and other biological denitrification treatment process with special features, the specific parameters should be determined experimentally.
6.2.9 When selecting and determining the anaerobic treatment process operating parameters should be considered wastewater biological nitrogen and phosphorus removal process must be carbon source
begging.
6.2.10 starch wastewater treatment efficiency should be by testing or similar enterprises analog data to determine when there is no information on the efficiency of each treatment system
Refer to Table 4.
Table 4 wastewater treatment plant (station) unit process efficiency
6.3 Pretreatment
6.3.1 grill
6.3.1.1 before the wastewater treatment plant should be set fine grid, whether the need to fine grid before adding coarse grid to determine the drainage system according to the situation.
6.3.1.2 When the coarse grid using mechanical clearance, clearance grille 5 ~ 10mm, 10 ~ 15mm when using a manual removal, provided at the pump
Before the pump should meet the requirements.
6.3.1.3 should be chosen with a fine grid self-cleaning ability of the mechanical grating gap of 1 ~ 4mm.
6.3.1.4 should set an upper grille work platform. Platform height should be higher than the highest front grille design water level 0.5m; width appropriate for the two sides of the platform
0.7 ~ 1.0m; platform front aisle width, when using mechanical removal of not less than 1.5m, when the manual removal of not less than 1.2m; ENGINEERING
Washing facilities should be set up necessary security facilities for the internet.
6.3.1.5 screenings advised by mechanical transmission, dehydration Sinotrans.
6.3.1.6 grate discharge machine, material inlet and outlet should conveyor sealed form, according to the surrounding environment, the setting and deodorizing device is provided
Preparation of operating room ventilation, toxic gases should be established when conditions detection and alarm device.
6.3.2 sedimentation tank
6.3.2.1 sedimentation tank into the primary settling tank and secondary sedimentation tank. Primary sedimentation tank set before adjustment tank, secondary sedimentation tank set up after the aerobic tank.
6.3.2.2 sedimentation tank form factor should be based on the size of the processing, process characteristics and geological conditions determine the choice of advection, radial flow and
Efficiency (%) for
degree
The main treatment step of the process
CODCr BOD5 SS NH3-N
Natural precipitation grille, precipitation, adjusting 8 ~ 106 ~ 840 ~ 55 -
Pretreatment
Grille frame filter press, plate and frame filter press, adjusted to 10 10 to 158 45 to 60--
EGSB EGSB 80 ~ 92 90 ~ 95 30 ~ 50 - anaerobic Health
Was treated UASB UASB 80 ~ 92 90 ~ 95 30 ~ 50 -
Activated sludge SBR 75 ~ 90 85 ~ 95 80 ~ 90 85 ~ 90
Activated Sludge A/O secondary settling tank 75 to 90 85 to 95 80 to 90 91 to 96
Activated Sludge cyclic activated sludge process (CASS) 75 ~ 90 85 ~ 95 80 ~ 90 85 ~ 90
Aerobic Health
Treated
Biological contact oxidation biofilm 75 to 90 85 to 95 80 to 90 91 to 96
Biofilm MBR 50 ~ 85 30 ~ 60 80 ~ 95 80 ~ 90
Filter sand filter, Biological Aerated Filter (BAF) 10 ~ 20 - 50 ~ 60 -
Coagulation coagulation sedimentation (clarification, flotation) 15 - 30 - 50 - 70--
depth
deal with
Activated carbon adsorption of> 20 -> 80--
Vertical flow, swash plate (tube) and other cell types.
6.3.2.3 First sedimentation tank hydraulic loading surface is preferably 1.0 ~ 2.0m3/(m2 · h), other design parameters can refer to GB 50014.
6.3.2.4 mechanical sludge sedimentation tanks should be adopted, and should scrape the scum facilities.
6.3.2.5 inclined plate (tube) sedimentation tank design surface loading, according to the ordinary settling tank design surface loading of 2 to 3 times higher.
6.3.3 adjustment pool
6.3.3.1 regulating cell volume should be based on changes in the starch production wastewater production cycle curve using the graphic method calculation.
6.3.3.2 corn and wheat starch production wastewater residence time not less than 8h, potato starch production wastewater residence time should not be less than
12h; starch sugar production wastewater residence time of not less than 12h; modified starch production wastewater residence time required according to product type and row
Water law is determined, usually not less than 18h.
6.3.3.3 When adjusting the tank when the accident doubles as a discharge tank, the volume calculation should be considered accidental discharge capacity.
6.3.3.4 adjusting tank should be set up machinery, hydraulic or air agitation mixing apparatus, underwater equipment should be corrosion resistance.
6.3.3.5 When adjusting the pool when a mechanical stirrer, a border design flow rate is preferably 0.15 ~ 0.35m/s; when using air agitation, each
100m3 effective tank volume of gas by 1.0 ~ 1.5m3/min design; when both pre-adjustment pool or biochemical (catalytic) oxidation and other functions, its
Aeration oxygen demand should also meet the technological requirements; When the jet stirring power per cubic meter tank volume should not be less than 10W.
6.3.3.6 conditioning tank should be designed as closed-end, there should be through ventilation and deodorizing facilities should be taken regularly remove sediment measures.
6.3.3.7 adjusting tank emptying sump should be located, the bottom should be 0.003 to 0.005 of slope and aspect sump, the wall should be set up ladders and overflow
tube.
6.3.3.8 adjusting tank level alarm device shall be provided.
6.4 anaerobic biological treatment
6.4.1 pH value adjustment
6.4.1.1 starch production wastewater should be set pH value between pre-treatment and biological treatment adjustment facility.
6.4.1.2 pH value adjustment should choose NaHCO3, sodium carbonate, HCl and other agents, should not use H2SO4 agents.
6.4.1.3 pH value adjustment should be divided into two parts coarse and fine, coarse and generally in the pool or the pool is adjusted to adjust, fine tune should adopt the solution
Medicine equipment, fully dissolved after mixing equipment, the use of automated quantitative metering pump dosing.
6.4.1.4 pH value adjustment can be hydraulic stirring, mechanical stirring or air agitation.
6.4.2 Temperature adjustment
6.4.2.1 starch production wastewater facilities shall be provided to adjust the temperature.
6.4.2.2 pool water heating can be used to set heating direct heating or by indirect heating using a heat exchanger manner.
6.4.2.3 Selection of the heat exchanger should be based on wastewater characteristics, determine the temperature and medium temperature after the heat exchange. Heat exchanger heat transfer area should be based on
Balance calculations, the results should be left 10% to 20% margin.
6.4.2.4 When the water temperature exceeds the set temperature anaerobic reactor, cooling should take appropriate measures to cool.
6.4.3 anaerobic biological treatment
6.4.3.1 discharged during the production of starch biodegradable good performance of high concentration organic wastewater anaerobic biological treatment can be the first to enter. Tired
Oxygen or anaerobic effluent CODCr removal selection should be designed to meet the following biological denitrification BOD5/TN ratio> 4, biological phosphorus removal BOD5/TP
> 10 requirements. If you can not meet this requirement, can jumper sewage or additional ways to improve carbon nitrogen ratio, carbon phosphorus ratio.
6.4.3.2 anaerobic bioreactor influent pH value should be 6.5 to 7.8, the content of suspended solids should be less than 1500mg/L, ammonia concentration should be less than
600mg/L, influent COD concentration and sulfate concentration ratio greater than 10: 1. When the concentration of pollutants is higher than the above reference value, the need to reduce
Anaerobic bioreactor volume load or additional pretreatment facilities.
6.4.3.3 temperature anaerobic technology should be used, preferably the temperature is 32 ℃ ~ 35 ℃.
6.4.3.4 When selecting UASB, volume load is preferably 5 ~ 10kgCODCr/(m3 · d); When selecting EGSB or IC, the volume load
Preferably of 15 ~ 30kgCODCr/(m3 · d).
6.4.3.5 UASB process design and EGSB shall comply with the provisions of HJ 2023 HJ 2013 and.
6.4.3.6 For seasonal production of potato starch production wastewater treatment plant (station), anaerobic species should be set up storage facilities.
6.4.3.7 starch sugar water, modified starch wastewater should by adjusting the pH, nutrient regulation necessary pretreatment measures, pollution
Index was controlled within the anaerobic reactor water limit, so as not to impact on the anaerobic biological treatment system.
6.5 aerobic biological treatment
6.5.1 should adopt the aerobic biological treatment of organic load is low, strong shock load capacity, with the treatment process denitrification capability, optional oxidation
Ditch, A/O or SBR.
6.5.2 aerobic biological treatment process design should be consistent with GB 50014, HJ 576, HJ 577, HJ 578, CECS 111, CECS 112 of
Provisions.
6.5.3 When calculating the effective tank volume using activated sludge, the sludge load preferably by 0.1 ~ 0.4kgBOD5/(kgMLSS · d) design, 20 ℃ when
The denitrification rate advised by 0.075 ~ 0.115kgNO3 - N/(kgMLSS · d) design; when calculated using the effective tank volume biological contact oxidation method,
Press the volume load should be 0.4 ~ 0.8kgBOD5/(m3 filler · d) design.
6.5.4 activated sludge sludge age should take 10 ~ 20d.
6.5.5 aerobic biological treatment temperature should be controlled between 15 ℃ ~ 30 ℃, low temperature in winter and take full account of the removal of carbon and nitrogen removal of contaminants
The impact, if necessary, can be taken to reduce the load, or warming measures such as insulation.
6.5.6 BOD5 COD removal should be based on the calculation, taking into account the nitrogen requirements, calculated with reference to the provisions of GB 50014.
6.5.7 aerobic tank pH value should be 7 to 8, the remaining alkalinity should be greater than 70mg/L (as CaCO3), when the alkalinity can not meet the above requirements,
It should (have) to take measures to increase alkalinity. By increasing the volume of anoxic or dosing (increase) alkalinity ways to improve wastewater residual alkali
degree.
6.5.8 sludge recycle ratio is generally 50% to 100%, mixed liquor suspended solids (the MLSS) is preferably 3 ~ 5g/L.
6.5.9 When using the pre-denitrification process, circulating reflux ratio should be determined according to the efficiency of denitrification, preferably 200% to 400%. When the multi-stage
A/O nitrogen removal process when setting the number of stages and water levels should be determined according to the proportion of nitrogen requirements.
6.5.10 when necessary, may be provided at a later stage filler plug-flow aeration tank to facilitate the generation of long microbial growth.
6.5.11 aeration tank should consider setting up facilities to eliminate the bubble, can be used to add defoamers, water and mechanical defoaming defoaming and other measures. There are follow-up
MBR pool not adding defoamers defoaming.
6.6 Advanced Treatment Processes
6.6.1 Phosphorus
When the biological phosphorus removal can not meet emissions requirements, it should be treated with chemical phosphorus removal, the appropriate use of inorganic salts agents, such as calcium, iron
Aluminum salts and the like. Dosage and select chemical phosphorus removal facilities should be considered water quality characteristics, effluent total phosphorus discharge requirements, biological
Process performance and the impact of chemicals and the reliability of supply, investment and operating costs and other factors, determined by experiment.
6.6.2 Advanced Treatment
6.6.2.1 Wastewater treatment can be coagulation, sedimentation (or clarification, flotation), filtration (or microfiltration), and other deep-BAF
The degree of processing technology, the process should be designed to comply with the provisions of GB 50335.
6.6.2.2 coagulation, precipitation (or clarification, flotation) process when mixing section G value of 300 ~ 500s-1, mixing time 30 ~ 120s;
Flocculation section G value of 30 ~ 60s-1, flocculation time 5 ~ 20min; clarification Ikegami flow rate 0.4 ~ 0.6mm/s, the residence time of 1.5 ~ 2.0h;
Flotation tank gas-water contact time 30 ~ 100s, surface load 6 ~ 9m3/(m2 · h), hydraulic retention time of 20 ~ 40min; sedimentation related parameters
See Article number 6.3.2.
6.6.2.3 When the filtration process, the influent suspended solids should be less than 50mg/L, the pool filtration process design can refer to similar enterprises operating data
And GB 50335 provisions, selection and process design of the filter should be determined based on the information provided by the equipment suppliers and similar enterprises operating data
set.
6.6.2.4 When the microporous membrane filtration process, the effluent after biological treatment into the microfiltration apparatus before adding antibacterial agents should be advised to use automatic control
System, online monitoring pressure through the membrane, controlled backwash and chemical cleaning cycles.
6.6.2.5 When there is a higher quality requirements, increase the depth of processing other cell technology in combination with one or several other cell technology
Activated carbon adsorption, ozone - activated carbon, ion exchange, ultrafiltration, nanofiltration, reverse osmosis, chemical oxidation and advanced oxidation.
6.6.2.6 When a reuse requirements, wastewater treatment should be disinfected, the appropriate use of chlorine dioxide disinfection, the use of silica
Chlorine disinfection, the amount of chlorine available chlorine is preferably 5 ~ 10mg/L, disinfection contact time should be more than 30min.
6.6.2.7 wastewater treatment plant (station) back to water storage, distribution and monitoring systems shall comply with the provisions of GB 50335.
6.7 Sludge Treatment and Disposal
6.7.1 sludge production can be calculated according to the process conditions can be also determined by reference to similar enterprises.
6.7.2 pretreatment sludge volume should be determined based on the precipitation efficiency, suspended solids, and water removal.
6.7.3 anaerobic treatment of sludge should be based on the concentration of organic matter, sludge yield coefficient; anaerobic sludge anaerobic species should be used as a direct
Sale, unsold anaerobic sludge should be concentrated together with the aerobic sludge dewatering process.
6.7.4 aerobic treatment should be based on the amount of organic matter sludge concentration, sludge yield coefficient; when the lack of information, according to the following data into the
Sludge line Estimation:
a) When using activated sludge, sludge production can be 0.5 ~ 0.7kg dry sludge/kg BOD5 design. Sludge moisture content of 99.3% to 99.4%.
B) When using biofilm, sludge production can be 0.3 ~ 0.5 kg of dry sludge/kg BOD5 design. Sludge moisture content of 99.3% to 99.4%.
6.7.5 Sludge Thickening can be gravity concentration, flotation concentrate concentration or mechanical processes. When using gravity concentration, sludge solids loading should be adopted
With 20 ~ 40kg/(m2 · d), concentrated period of not less than 16h; when using mechanical thickening should be provided in accordance with the information and equipment suppliers
Similar enterprises operating data determined after testing and technical and economic analysis.
6.7.6 sludge should be dewatered sludge dewatering machine types of sludge should be the nature of generation and dewatering requirements and the technical and economic comparison
After OK. We should use Volute dehydrator, centrifugal dehydrator, a belt filter press or a frame filter.
6.7.7 aerobic and anaerobic biological sludge before dewatering, dosing should be conditioning agents and types of dosage should be determined experimentally. Sludge dewatering ago
The moisture content should be less than 98% moisture content of dewatered sludge should be less than 80%.
6.7.8 should be set dewatered sludge yard. The size of the yard sludge by sludge production, transportation OK. Sludge ground in and around the yard should
Seepage, leakage, anti-rain and other measures.
6.7.9 supernatant was concentrated sludge generated in the process, water is removed and stacked to produce exudate produced during dewatering should be set up to collect
Line, back to the conditioning tank.
6.7.10 final disposal of sludge including utilization, incineration and landfill and other means, should give priority to the comprehensive utilization; sludge disposal should
In line with national standards.
6.8 Biogas Utilization and Odor Treatment
6.8.1 biogas purification and utilization comply with the requirements of HJ 2013.
6.8.2 odor emissions should comply with the provisions of GB 14554.
6.8.3 pretreatment process and anaerobic biological treatment step should be set odor collection and treatment system.
6.8.4 Sewage odor wind structures should be based on the type of structure, the odor emitting surface area, volume and other factors odor space
Comprehensive determined; deodorizing system and ventilation system should be separated, when it is difficult to separate out the need to regularly processing structure (built) building materials,
Suction capacity should be not less than 6 times by ACH/h design, when short-term staff and enter the number of ventilators is difficult to meet, we need to consider personnel into
Forced ventilation interim measure out time.
6.8.5 Sewage odor control system should cover the odor source added, odor collection, composed of post-odor treatment and processing portion emissions, to meet the
Case discharge requirements, the plant can also take the spray fluid and other mitigation measures.
Layout 6.8.6 odor treatment device as close as possible odorous air volume larger structures, the number of devices based on the amount of wind odor, odor
Source location, device outfall location and sensitive facilities, operation and management and other factors to determine the comparison, when the structures are arranged dispersed smelly
, The partition can be processed.
7 main process equipment and materials
7.1 Fan
OK 7.1.1 Fan supply air volume and pressure should consider the following factors:
a) wastewater BOD;
b) wastewater ammonia concentration;
c) When the water temperature should be high temperature coefficient correction;
d) the density of air and oxygen should be corrected according to the local atmospheric pressure;
e) When more reducing substances in wastewater aeration and a longer period of time, consideration should be given additional oxygen demand;
f) When using the blower should be based on gaseous equation to calculate the amount of wind influence coefficients, according to test 80% of the amount of inlet air blower
consider;
g) When using microporous aeration equipment, product performance should be considered in the oxygen utilization factor, should take low;
h) wind pressure should be based on characteristics of the fan, air volume losses, the resistance of the air diffuser aeration depth (refers to the surface from the diffusion device)
Computing is determined;
i) When the centrifugal fan should consider the outdoor temperature and the standard temperature (20 ℃) pressure loss caused by the centrifugal fan (usually every elevated
1 ℃, pressure loss 20mmH2O), centrifugal fan operating point can not be close to the fans surge zone, wind control should be established;
Due to limitations fan flow classification, the choice of wind turbine rated not less than 95% after correction of the amount of oxygen;
7.1.2 High-speed single-stage centrifugal blower aeration should be consistent with the provisions of HJ/T 278, the blower shall comply with HJ/T 251's.
7.1.3 Number of units blowers work at Three or less, should set up a spare blower; blower work or the number of units in the four to four
On, should be provided with at least two spare blowers, blower spare unit shall be designed with maximum consideration.
7.2 aeration equipment
Mechanical surface aerators, medium/porous aerator, brush aerator, submersible aerator blast, jet aeration, aeration turntable
Means for diffuser aeration should be consistent with HJ/T 247, HJ/T 252, HJ/T 259, HJ/T 260, HJ/T 263, HJ/T 280, HJ/T 281
Provisions.
7.3 dryer
7.3.1 sludge dewatering machine and frame filter Van filter shall comply with HJ/T 283's.
7.3.2 sludge dewatering with belt filter press should be consistent with the provisions of HJ/T 242's;
7.3.3 concentrated sludge dewatering machine belt shall comply with HJ/T 335's.
7.4 dosing equipment
Dosing equipment shall comply with the provisions of HJ/T 369's.
7.5 pump
7.5.1 should be to select the model and the number of units in accordance with the flow of the sewage pump sewage lifting, nature and head.
7.5.2 The total lifting capacity pumping stations, sewage inlet pipe should be the maximum amount of the design, and shall meet the requirements of the maximum flow rate when the fullness;
7.5.3 should try to choose the same type (maximum of two models) pumps and caliber for repair, but must meet the low flow
Demand;
7.5.4 submersible sewage pump shall comply with HJ/T 336's.
7.5.5 should be GB 50014 setting standby pump.
7.6 filler
Hanging packing shall comply with HJ/T 245, the filler suspension shall comply with HJ/T 246's.
7.7 Other equipment, materials
Anaerobic tank may be modular in design, materials, including carbon steel, LIPP, enamel and other assembly, other machinery, equipment and materials shall comply
With national or industry standards.
8 Inspection and Process Control
8.1 Detection
8.1.1 should be set according to the processing technology and management requirements of water measurement, water level observation, water quality observation, sampling laboratory monitoring, measurement drugs
Instrument.
8.1.2 line detection means for implementing the closed-loop control and performance assessment to provide data for the waste water treatment project, the detection points are located in the affected
In the control unit or the inlet and outlet at the sampling frequency and monitoring programs shall be determined in accordance with the process control requirements.
8.1.3 pretreatment system should detect the inlet and outlet flow, pH, SS, CODCr, characteristics of pollutants (such as sulfide, ammonia, nitrogen,
TP, etc.) and dosage systems, sludge production and other indicators.
8.1.4 Anaerobic treatment unit should be checked into, pH value of exports, temperature, CODCr, BOD5, SS, ammonia nitrogen, total nitrogen, and the reaction tank
pH value within the temperature, volatile fatty acids (VFA) and alkalinity.
8.1.5 aerobic biological waste water into the unit should be detected, pH value of exports, alkalinity, CODCr, BOD5, SS, sulfide, ammonia, nitrogen,
TP and aeration of the reaction tanks, DO, sludge characteristics, sludge concentration and other indicators.
8.1.6 depth processing unit should detect the inlet and outlet of pH, CODCr, BOD5, SS, ammonia nitrogen, total nitrogen, total phosphorus, total chromium, hexavalent chromium,
Total hardness, conductivity, and system administration and other indicators.
8.2 Process Control
8.2.1 Starch Wastewater Treatment should be based on the actual situation of the project, the choice of a suitable control, and size of the project should, according to the process stream
Process control and operational management requirements to determine requirements and parameters.
The main production process unit 8.2.2 small integrated wastewater treatment plant can be automatically controlled, 5000m3/d and above-scale wastewater treatment plant
We should adopt the centralized management and monitoring, computer control system distributed control.
8.2.3 field instrumentation should have anti-corrosion, explosion-proof, anti-leakage, anti-fouling, self-cleaning and other functions.
8.2.4 Starch Wastewater Treatment Process Control should refer to the relevant provisions of GB 50014.
9 Main aided engineering
9.1 Electrical
9.1.1 Wastewater Treatment of electrical engineering and technical requirements should be in the production process of the technical requirements consistent with the connection of the power supply and the operating room
The settings should consider the overall production process, high and low voltage electricity and neutral grounding should be consistent with the production equipment.
9.1.2 anaerobic systems, gas equipment rooms and other seal has an area of explosion-proof area, explosion-proof grade II.
9.1.3 Independent treatment plant (station) power supply should be designed according to two loads.
9.1.4 electrical system design should be consistent ......
Related standard:   HJ 1009-2019  HJ 1015.1-2019
   
 
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