CN108585350A - A kind of town sewage treatment system up to standard to IV class water of surface water - Google Patents
A kind of town sewage treatment system up to standard to IV class water of surface water Download PDFInfo
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- CN108585350A CN108585350A CN201810293330.2A CN201810293330A CN108585350A CN 108585350 A CN108585350 A CN 108585350A CN 201810293330 A CN201810293330 A CN 201810293330A CN 108585350 A CN108585350 A CN 108585350A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 239000010865 sewage Substances 0.000 title claims abstract description 37
- 239000002352 surface water Substances 0.000 title claims abstract description 16
- 238000011282 treatment Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 34
- 238000010992 reflux Methods 0.000 claims abstract description 18
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000004062 sedimentation Methods 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- 238000005189 flocculation Methods 0.000 claims abstract description 11
- 230000016615 flocculation Effects 0.000 claims abstract description 11
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 11
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000006213 oxygenation reaction Methods 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- 239000010802 sludge Substances 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 10
- 239000004411 aluminium Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 239000001632 sodium acetate Substances 0.000 claims description 5
- 235000017281 sodium acetate Nutrition 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 12
- 229910052698 phosphorus Inorganic materials 0.000 description 12
- 239000011574 phosphorus Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 244000005706 microflora Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 238000011020 pilot scale process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of town sewage treatment systems up to standard to IV class water of surface water, including polluted water pretreatment apparatus, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank, secondary settling tank, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter to be connected in series；Polluted water pretreatment apparatus connect and communicates with pre- denitrification pond, the 1st anaerobic pond respectively；It is connected to equipped with muddy water reflux line between secondary settling tank and pre- denitrification pond；Muddy water reflux line is equipped between 1st aerobic tank and the 1st anoxic pond, it is 100%~400% that muddy water mixed solution, which is back to reflux ratio,.1st anaerobic pond, the 2nd anoxic pond set additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond or denitrification and denitrogenation biological filter is communicated with oxidation disinfection bath, oxygenation pond series winding.This invention ensures that each good in nitrate nitrogen removal effect is up to standard to IV class water quality standard.
Description
Technical field
The present invention relates to technical field of sewage, refer in particular at a kind of town sewage up to standard to IV class water of surface water
Reason system.
Background technology
As China's water pollution problems increasingly highlights, the raising of urban wastewater treatment discharge standard has been trend of the times.From
The requirement that current quality of water environment improves sees, treated for many municipal sewage plants, and water outlet is often discharged into urban river,
As the water body in river.The existing sewage disposal plant effluent in China, discharge standard refer to more《At GB18918-2002 town sewages
Manage factory's pollutant emission standard》In level-one A.However for level-one A standards, water quality just corresponds to bad V class of surface water
Water.This water quality is discharged into the water body environment there are few self-purification capacity, causes water body not repaired not only, instead by dirt
Then there is the phenomenon that " the more controlling the more dirty " in dye.Water pollution increasingly sharpens, and an urgent demand effluent of municipal sewage plant reaches
IV class standard of earth's surface class.I.e. by CODCr30mg/l is reduced to by the 50mg/L of level-one A；BOD5It is reduced to by the 10mg/L of level-one A
6mg/L；Ammonia nitrogen is reduced to 1.5mg/L by the 5mg/L of level-one A；Total phosphorus is reduced to 0.3mg/L by the 0.5mg/L of level-one A；Total nitrogen
5mg/L is reduced to by the 15mg/L of level-one A；Dissolved oxygen (DO) is improved by the no requirement (NR) of level-one A to 3mg/L.
1 Effluent criteria level-one A of table and IV class water quality contrast table of earth's surface
Currently, expansion practice successively in all parts of the country, to sewage effluents CODCr, ammonia nitrogen, total nitrogen, total phosphorus etc. requirement more
Height, existing IV class water system are actually difficult to up to standard all referring to marking.Therefore, it is necessary to work out a kind of new technical solution to solve
State problem.But there are still following key problems for existing IV class water treatment system：(1) part of two stage biological processing system is designed not
Rationally place, each function sludge age and dominant microflora are difficult to control；Organic carbon source does not make full use of in water inlet；Organic carbon in water inlet
Source does not make full use of, and nitric efficiency is relatively low；Nitrification is incomplete, when winter temperature is relatively low, is discharged NH4 +- N is difficult that control exists
1.5mg/L following；Water outlet TP is generally higher than 1.0mg/L；And tradition A2O Nitrogen/Phosphorus Removals are unstable；(2) traditional chemistry removes
Phosphorus technology, pharmaceutical use is big, and treatment effect is poor, and surface loading is low, takes up a large area, it cannot be guaranteed that stably reaching IV class water
Index；(3) the smart denitrogenation of tradition has the following problems frequently with denitrification and denitrogenation biological filter：1) known in industry, due to anoxic/
The influences such as hardened between biologic packing material under anaerobic denitrifying environment, short stream, the water outlet of the denitrification bio-filter after additional carbon
CODCrInfluent COD can be comparedCrGao Yue -10~25mg/L, level-one A and IV class water CODCrDiffer only by 20mg/L, BOD5Differ only by 4mg/
L, IV class water are discharged CODCrAnd BOD5It is extremely unstable；2) the carbon source kind selection of denitrification filter pool, the accurate dosage control of carbon source
It is very crucial, for BOD5Level-one A and IV class water differ only by 4mg/L, directly influence water outlet CODCrIncrease how many, denitrification
Utilization of carbon source rate and whether can stably reaching standard core key, it is necessary to accurate control；(4) denitrification and denitrogenation biological filter water outlet has
Machine object concentration increases, and later process unit is without reduction CODCrAnd BOD5Exceeded measure；(5) due to denitrification denitrogenation be anoxic/
Occur under anaerobic environment, the waste water dissolved oxygen (DO) after denitrification advanced nitrogen is generally below 0.2mg/L, and IV class water
Dissolved oxygen otherwise be less than 3mg/L, therefore other measures is needed to further increase the dissolved oxygen (DO) of sewage, and existing IV class water
There is no consider this key index for processing system.
Invention content
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of urban wastewater treatments up to standard to IV class water of surface water
System, the present invention can fundamentally solve traditional IV class water system, and to go out water unstable up to standard and be difficult to all referring to marking difficulty up to standard
The requirement for reaching IV class water quality standard all referring to mark can be completely secured in topic.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of town sewage treatment system up to standard to IV class water of surface water, which is characterized in that institute's sewage disposal system by
Polluted water pretreatment apparatus, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank,
Secondary settling tank, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter are connected in series；Polluted water pretreatment apparatus
It connect and communicates with pre- denitrification pond, the 1st anaerobic pond respectively；Muddy water reflux line is equipped between secondary settling tank and pre- denitrification pond to connect
Logical, reflux muddy water can enter pre- denitrification pond by pipeline, and return sludge ratio is 30%~100%；1st aerobic tank with
Muddy water reflux line is equipped between 1st anoxic pond, it is 100%~400% that muddy water mixed solution, which is back to reflux ratio,.；1st anaerobism
Pond, the 2nd anoxic pond set additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond, and water outlet enters through ozone pond
After processing IV class water quality standard can be stably reached all referring to mark；Or denitrification and denitrogenation biological filter is contacted with oxidation disinfection bath, oxygenation pond
It communicates, water outlet stably reaches IV class water quality standard after " oxidation disinfection bath+oxygenation pond " processing all referring to mark；Sewage after up to standard into
The outer row of row.
Further, the 1st anaerobic pond, the 2nd anoxic pond water inlet end are equipped with nitrate nitrogen on-line monitoring system, and additional carbon is existed by nitrate nitrogen
Line monitoring system carries out linking to be precisely controlled adding.
Further, the additional carbon is preferably methanol or sodium acetate.
Further, the polluted water pretreatment apparatus is that sewage passes through grid, setting pot or primary sedimentation tank.
Further, the magnetic or sand load flocculation dephosphorization sedimentation basin are equipped with outer adding medicine device, and the medicament added is magnetic kind
Or one of sand kind and iron system or aluminium system, iron aluminium system salt.
Further, the denitrification and denitrogenation biological filter be upward flow denitrification and denitrogenation biological filter or it is lower to flow denitrification give birth to
Object filter tank.
Beneficial effects of the present invention：
(1) multiple spot reasonable distribution is used to intake, raw water utilization of carbon source is more abundant.
(2) the pre- denitrification pond processing that the muddy water of secondary settling tank reflux is set, reflux kind is eliminated using the carbon source of raw water
Nitrate nitrogen in mud alleviates the inhibiting effect to anaerobic phosphorus release, and greatly improve anaerobic pond releases phosphorus effect；PolyP bacteria is improved good
Excessively inhale phosphorus effect in oxygen pond；Each function sludge age and dominant microflora control are more reasonable.
It is anti-that (3) first anoxic ponds make full use of carbon source (raw water carbon source, supplementary carbon source) to carry out denitrification, denitrification dephosphorization
It answers, nitrate nitrogen removal is more abundant；Additional carbon can make up the deficiency of denitrifying carbon source, improve denitrification effect；Second anoxic pond
It ensure that the further removal of nitrogen；Second aerobic tank can fully ensure that water quality, prevent water quality wave except assisting nitrification, assistance to inhale phosphorus
It is dynamic, well can also stripping be attached to nitrogen on sludge, prevent Mud up-floating.
(4) magnetic kind or sand kind magnetic flocculation deep phosphorous removal sedimentation basin, using magnetic kind or sand kind as nucleus so that magnetic powder or sand
Kind and the progress of phosphatization sediment flco are efficiently coprecipitated, are the floor spaces 1/20 of conventional coagulative precipitation tank, save 20% or more
Iron system or aluminium system salt, and magnetic kind or sand kind have 99% or more the rate of recovery；Treatment effect is more excellent, floor space smaller,
Convenient for industrialization and it is widely applied.
(5) denitrification and denitrogenation biological filter water inlet total nitrogen is fluctuation (wherein nitrate nitrogen, nitrite nitrogen, ammonia nitrogen, organic nitrogen
Concentration is also fluctuation), the present invention passes through the monitoring nitre state (NO that links onlinex -- N) index and then it is precisely controlled adding for carbon source
Amount solves and is discharged (TN, COD caused by each index fluctuation of influent qualityCr、BOD5) it is unable to the problem of stably reaching standard, it can guarantee
It is discharged TN, CODCr、BOD5Etc. indexs stably reaching standard.Our company summarizes the experience according to long-term pilot scale research and engineer application and finds,
Relative to carbon sources such as acetic acid, glucose, the economic benefit and utilization rate higher of sodium acetate and methanol, and denitrification denitrogenation biological filter
The water outlet COD in pondCr、BOD5It is small to increase probability, is more easy to be precisely controlled that IV each index of class water is up to standard, this experiment and summary of experience can
Fundamentally solve most of problem of denitrification denitrogenation fluctuation of service in IV class water system.
(6) it solves in traditional IV class water system, denitrification and denitrogenation biological filter is discharged CODCr、BOD5Probability rising,
By the way that subsequent processing units (oxidation, disinfection) are arranged, oxidation increases organic matter, part ammonia nitrogen, and then reduces CODCr、BOD5Etc. referring to
Mark, solves the problems, such as out that water unstable is up to standard.
(7) it solves in traditional IV class water system, dissolved oxygen (DO) key index cannot be up to standard to IV class water quality standard
Requirement.
The present invention can fundamentally solve traditional IV class water system, and to go out water unstable up to standard and be difficult to up to standard all referring to marking
The requirement for reaching IV class water quality standard all referring to mark can be completely secured in problem.
Description of the drawings
Fig. 1 is the town sewage treatment system schematic diagram up to standard to IV class water of surface water of the present invention
Specific implementation mode
From attached drawing 1 as can be seen that the of the invention town sewage treatment system up to standard to IV class water of surface water by sewage in advance
Manage equipment, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank, secondary settling tank, magnetic
Or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter are connected in series；Polluted water pretreatment apparatus respectively in advance
Denitrification pond, the connection of the 1st anaerobic pond communicate；It is connected to, flows back equipped with muddy water reflux line between secondary settling tank and pre- denitrification pond
Muddy water can enter pre- denitrification pond by pipeline, and return sludge ratio is 30%~100%, and excess sludge periodically discharges；Described 1st
Between aerobic tank and the 1st anoxic pond be equipped with muddy water reflux line, muddy water mixed solution be back to reflux ratio be 100%~
400%.；1st anaerobic pond, the 2nd anoxic pond set additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond, is gone out
Water enters can stably reach IV class water quality standard after ozone pond is handled all referring to mark；Or denitrification and denitrogenation biological filter and oxidation sterilizing
Pond, oxygenation pond series winding communicate, and water outlet stably reaches IV class water quality standard after " oxidation disinfection bath+oxygenation pond " processing all referring to mark；
Sewage after up to standard carries out outer row.
1st anaerobic pond, the 2nd anoxic pond water inlet end are equipped with nitrate nitrogen on-line monitoring system, and additional carbon is monitored on-line by nitrate nitrogen
System carries out linking to be precisely controlled adding.
The additional carbon is preferably methanol or sodium acetate.
The polluted water pretreatment apparatus is that sewage passes through grid, setting pot or primary sedimentation tank.
The magnetic or sand load flocculation dephosphorization sedimentation basin are equipped with outer adding medicine device, the medicament added be magnetic kind or sand kind it
One and iron system or aluminium system, iron aluminium system salt.
The denitrification and denitrogenation biological filter is upward flow denitrification and denitrogenation biological filter or lower to flow denitrification biofilter.
Town sewage treatment system processing procedure up to standard to IV class water of surface water of the invention is as follows：
(1) town sewage is pre-processed by sewage by grid, setting pot or primary sedimentation tank, remove sewage in sand,
Stone and bulk particulate matter substance；Ensure the stability of later stage biochemical reaction；.
(2) sewage is divided into two parts sewage after pre-processing；The mud of a part of sewage (10%~40%) and secondary settling tank reflux
Water enters the pre- denitrification pond of pre- denitrification after being sufficiently mixed, the organic matter (ss suspended solid and molten being utilized respectively in pretreating sewage
Solution property organic matter) and reflux muddy water in nitrate (nitrate nitrogen, nitrite nitrogen) carry out pre- anti-nitration reaction, removal returned sludge
In nitrate nitrogen, organic matter, mitigate later stage anaerobic phosphorus release inhibition influence, be carried out at the same time aminating reaction；Another part sewage
(60%~90%) carries out releasing phosphorus reaction, simultaneously into anaerobic pond after mixing with pre-denitration pond water outlet using the carbon source in raw water
Carry out aminating reaction；
(3) the anaerobic pond water outlet enters anoxic pond, using carbon source in raw water, carries out denitrification denitrogenation reaction, will be in water
Nitrate nitrogen be converted to nitrogen removal, be carried out at the same time the reactions such as ammonification；In raw water when carbon source deficiency, organic carbon source can be additionally added；
(4) the anoxic pond water outlet enters aerobic tank, carries out aerobic nitrification, synchronous nitration and denitrification, inhales phosphorus reaction, simultaneously
Sludge Surface nitrogen is released into the water surface, the aerobic tank dissolved oxygen is 1.5~4.0mg/L；The muddy water of the aerobic tank mixes
Liquid is back to anoxic pond, and reflux ratio is 100%~400%；
(5) the aerobic tank water outlet enters secondary settling tank, realizes that mud-water separation, the sludge part of precipitation flow back into pre- denitrification
Pre- denitrification pond, return sludge ratio are 30%~100%, and excess sludge periodically discharges；
(6) supernatant of secondary settling tank discharge enters magnetic or sand load flocculation deep phosphorous removal sedimentation basin, removes remainder
SS and TP ensures water outlet SS and TP stably reaching standards；The medicament that the magnetic or sand load flocculation deep phosphorous removal sedimentation basin add is magnetic
One of kind or sand kind and iron system or aluminium system, iron aluminium system salt；Using magnetic kind or sand kind as nucleus so that magnetic powder or sand kind and phosphatization
The progress of sediment flco is efficiently coprecipitated, greatly improves the removal efficiency and sedimentation time of phosphorus, while reducing the usage amount of medicament, sand
Kind or the magnetic kind rate of recovery are also above 99% or more.
(7) magnetic or sand load flocculation deep phosphorous removal sedimentation basin water outlet enter denitrification and denitrogenation biological filter, carry out further
Ground depth removal SS and nitrate nitrogen, nitrogen is converted to using additional carbon source by remaining nitrate nitrogen；The denitrification denitrogenation biology
Filter tank is upward flow denitrification and denitrogenation biological filter or lower to flow denitrification biofilter；Additional carbon passes through filter tank water inlet end
" nitrate nitrogen on-line monitoring system " progress " linkage is precisely controlled its dosage ", solves the problems, such as from core source caused by variation water quality
Go out water unstable problem；The additional carbon in the denitrification denitrogenation filter tank is preferably methanol or sodium acetate, the pilot scale of our company
Research and engineering experience show compared to other carbon source kinds, using two kinds of carbon sources, for reducing denitrification denitrogenation biological filter
Pond is discharged CODCrAnd BOD5Probability is of great significance；
(8) denitrification and denitrogenation biological filter water outlet enters ozone pond, synchronizes disinfection, oxidation residual organic substances, improves
Oxygen in water reacts, and IV class water quality standard can be stably reached all referring to mark after ozone pond is handled；Or denitrification and denitrogenation biological filter
Water outlet enters " oxidation disinfection bath+oxygenation pond ", carries out disinfection, aoxidizes residual organic substances and part ammonia nitrogen, improves oxygen in water
Reaction；After " oxidation disinfection bath+oxygenation pond " processing IV class water quality standard is stably reached all referring to mark；And then it is decided from subsequent port solution
Water fluctuation problem solves denitrification and denitrogenation biological filter and leading portion effluent quality fluctuation problem, after the measure, it is ensured that each
It is arranged outside index stably reaching standard.
The present invention provides a kind of thinking and methods, and there are many method and the approach for implementing the technical solution, the above institute
State only is the preferred embodiment of the present invention, it is noted that for those skilled in the art, is not being departed from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present invention
Range is protected, all undefined components in this embodiment can be implemented in the prior art.
Claims (6)
1. a kind of town sewage treatment system up to standard to IV class water of surface water, which is characterized in that institute's sewage disposal system is by dirt
Water pretreatment equipment, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank, two
Heavy pond, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter are connected in series；Polluted water pretreatment apparatus point
It does not connect and communicates with pre- denitrification pond, the 1st anaerobic pond；It is connected to equipped with muddy water reflux line between secondary settling tank and pre- denitrification pond,
Its muddy water that flows back can enter pre- denitrification pond by pipeline, and return sludge ratio is 30%~100%；1st aerobic tank and the 1st
Muddy water reflux line is equipped between anoxic pond, it is 100%~400% that muddy water mixed solution, which is back to reflux ratio,.；1st anaerobic pond,
2nd anoxic pond sets additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond, and water outlet enters to be handled through ozone pond
Afterwards IV class water quality standard can be stably reached all referring to mark；Or denitrification and denitrogenation biological filter is communicated with oxidation disinfection bath, oxygenation pond series winding,
It is discharged stably reaches IV class water quality standard after " oxidation disinfection bath+oxygenation pond " processing all referring to mark；Sewage after up to standard carries out outer
Row.
2. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that pass through
1st anaerobic pond, the 2nd anoxic pond water inlet end are equipped with nitrate nitrogen on-line monitoring system, and additional carbon is carried out by nitrate nitrogen on-line monitoring system
Linkage, which is precisely controlled, to be added.
3. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Additional carbon is preferably methanol or sodium acetate.
4. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Polluted water pretreatment apparatus is that sewage passes through grid, setting pot or primary sedimentation tank.
5. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Magnetic or sand load flocculation dephosphorization sedimentation basin are equipped with outer adding medicine device, and the medicament added is one of magnetic kind or sand kind and iron system or aluminium
System, iron aluminium system salt.
6. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Denitrification and denitrogenation biological filter is upward flow denitrification and denitrogenation biological filter or lower to flow denitrification biofilter.
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| CN109879421A (en) * | 2019-03-07 | 2019-06-14 | 北控水务(中国)投资有限公司 | It is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system |
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| CN112158942A (en) * | 2019-11-26 | 2021-01-01 | 宁波中车时代电气设备有限公司 | A sedimentation tank for sewage treatment |
| CN113735378A (en) * | 2021-09-15 | 2021-12-03 | 北控(秦皇岛)水务有限责任公司 | Nitrogen and phosphorus removal sewage treatment system and treatment method |
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| CN109879421A (en) * | 2019-03-07 | 2019-06-14 | 北控水务(中国)投资有限公司 | It is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system |
| CN110066072A (en) * | 2019-05-16 | 2019-07-30 | 中国市政工程华北设计研究总院有限公司 | Sewage treatment optimizes operating system under a kind of maximum discharge standard |
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| CN110386725A (en) * | 2019-07-19 | 2019-10-29 | 青岛思普润水处理股份有限公司 | A kind of sewage based on MBBR and Magneto separate imitates processing system and method entirely |
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| CN112158942A (en) * | 2019-11-26 | 2021-01-01 | 宁波中车时代电气设备有限公司 | A sedimentation tank for sewage treatment |
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| CN116750899A (en) * | 2023-04-10 | 2023-09-15 | 江苏利保科技股份有限公司 | Advanced treatment system and treatment method for domestic sewage |
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