CN105776732A - Enhanced nitrogen and phosphorus removal device and technology for sewage - Google Patents
Enhanced nitrogen and phosphorus removal device and technology for sewage Download PDFInfo
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- CN105776732A CN105776732A CN201610094266.6A CN201610094266A CN105776732A CN 105776732 A CN105776732 A CN 105776732A CN 201610094266 A CN201610094266 A CN 201610094266A CN 105776732 A CN105776732 A CN 105776732A
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- 239000010865 sewage Substances 0.000 title claims abstract description 39
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000011574 phosphorus Substances 0.000 title claims abstract description 24
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 title abstract description 11
- 238000005516 engineering process Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000006243 chemical reaction Methods 0.000 claims abstract description 51
- 239000010802 sludge Substances 0.000 claims abstract description 37
- 230000002153 concerted effect Effects 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 79
- 238000010992 reflux Methods 0.000 claims description 33
- 241000894006 Bacteria Species 0.000 claims description 23
- 241000195493 Cryptophyta Species 0.000 claims description 23
- 238000004062 sedimentation Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 21
- 238000012856 packing Methods 0.000 claims description 21
- 238000005273 aeration Methods 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 12
- 206010002660 Anoxia Diseases 0.000 claims description 8
- 241000976983 Anoxia Species 0.000 claims description 8
- 235000016425 Arthrospira platensis Nutrition 0.000 claims description 8
- 240000002900 Arthrospira platensis Species 0.000 claims description 8
- 241000195649 Chlorella <Chlorellales> Species 0.000 claims description 8
- 206010021143 Hypoxia Diseases 0.000 claims description 8
- 230000007953 anoxia Effects 0.000 claims description 8
- 229940082787 spirulina Drugs 0.000 claims description 8
- 241000589630 Pseudomonas pseudoalcaligenes Species 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 238000004659 sterilization and disinfection Methods 0.000 claims description 7
- 241000194107 Bacillus megaterium Species 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 6
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 241000195663 Scenedesmus Species 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 5
- 241000195597 Chlamydomonas reinhardtii Species 0.000 claims description 4
- 241000588748 Klebsiella Species 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 241000195633 Dunaliella salina Species 0.000 claims description 3
- 241001300629 Nannochloropsis oceanica Species 0.000 claims description 3
- 239000004155 Chlorine dioxide Substances 0.000 claims description 2
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 29
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 230000001580 bacterial effect Effects 0.000 description 8
- 230000026676 system process Effects 0.000 description 7
- 229920000388 Polyphosphate Polymers 0.000 description 6
- 229920000037 Polyproline Polymers 0.000 description 6
- 239000001205 polyphosphate Substances 0.000 description 6
- 235000011176 polyphosphates Nutrition 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 238000004043 dyeing Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229920002527 Glycogen Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 241001495402 Nitrococcus Species 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229940096919 glycogen Drugs 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to an enhanced nitrogen and phosphorus removal device and technology for sewage.The technology comprises the steps that the sewage is pretreated to enter an anaerobic tank to be subjected to a mixing reaction with sludge flowing back from a strain separator and then enters the strain separator sequentially through an anoxic tank and an aerobic tank; the strain separator separates strains in mixed liquid, the high-density strains are set to the bottom and flow back to the anaerobic tank through a pump, the low-density strains enter a strain-algae concerted reaction tank together with water flow, biological stuffing is arranged in the concerted reaction tank, the synergistic effect of microalgae and the strains is formed in a system, part of the microalgae and the strains form an algae-strain biological film, and then the nitrogen and phosphorus removal effect of the system is enhanced; yielding water is treated through a setting tank and disinfected, and sludge in the setting tank flows back to the algae-strain concerted reaction tank.According to the technology, the problems that when the urban sewage is treated through an existing A2/O technology, the nitrogen and phosphorus removal effect is poor, and the cost is high are solved.The treatment technology has the advantages of being efficient in treatment, stable in water yielding, low in operation cost and the like and is economical, environmentally friendly and capable of achieving sustainable cyclic development.
Description
Technical field
The invention belongs to environmental technology field, concretely relate to a kind of sewage water intensification denitrification dephosphorization apparatus and technique.
Background technology
At present, along with the raising of industrialized process and urbanization degree, a large amount of discharges of nitrogen phosphorus cause that body eutrophication has developed rapidly becomes an important environmental problem.The mechanism of traditional biological denitrogenation dephosphorizing consists essentially of anaerobism, anoxia, aerobic three kinds of states.Under anaerobic, polyP bacteria consumes glycogen, poly-phosphorus (Poly-P) in born of the same parents is hydrolyzed to orthophosphate and is discharged into outside born of the same parents, and therefrom obtain energy, the organic carbon source (volatile fatty acid VAF) in environment is stored thing (being mainly PHB form) storage with born of the same parents' internal carbon source simultaneously.Under aerobic condition, polyP bacteria is with O2For electron acceptor, in evolution born of the same parents, the PHB of storage and the energy of utilization generation excessively take the photograph phosphorus from environment, store with the form of polyphosphoric acid high energy band, reach the purpose of biological removal of phosphorus in wastewater by getting rid of the excess sludge rich in phosphorus.But only when the ratio of VFA/P is higher than 10～20 times, guarantee has enough VFA to promote the breeding of PAO, and otherwise in Prepositive denitrification when biological denitrificaion needs to carry out simultaneously, VFA is often not enough, it is impossible to the two gets both.Additionally, some technological operation is complex, should sludge reflux mixed-liquor return again, what have also wants secondary mixed-liquor return, and investment and operating cost are high, and operation management is complicated.
Traditional biological denitrification dephosphorization technique mainly includes anaerobic-aerobic (A/O) activated sludge denitrification process and anaerobic-anoxic-oxic (A2/ O) technique.
Anaerobic-aerobic (A/O) activated sludge denitrification process is made up of anoxic pond, Aerobic Pond, sedimentation tank, and waste water initially enters anoxic pond, utilizes ammonifiers that the organic nitrogen in waste water is converted into NH3-N, enters back into Aerobic Pond, in Aerobic Pond except carbonaceous organic material is aoxidized, under appropriate conditions, utilizes nitrococcus and nitrifier by the NH in waste water waste water3The nitrated generation nitrate nitrogen of-N.In Aerobic Pond, nitrated mixed liquor is by inner circulating reflux to anoxic pond, and the sludge reflux of sedimentation tank maintains the sludge balance of system to anoxic pond.
Anaerobic-anoxic-oxic (A2/ O) technique has anaerobic pond, anoxic pond, Aerobic Pond to be in series.Mainly carrying out the release of phosphorus at first section of anaerobic pond, make the concentration of the phosphorus in sewage raise, deliquescent Organic substance is made the BOD lowering of concentration in sewage, a part of NH by Cell uptake3Because of the synthesis of cell, concentration reduces-N.In anoxic pond, BOD concentration continues to decline, NO3 --N concentration declines to a great extent, and the concentration of phosphorus is basically unchanged.In Aerobic Pond, organic concentration is aoxidized by microbial biochemical, and concentration declines further, and itrogenous organic substance concentration is remarkably decreased, and phosphorus absorbs along with the process of polyP bacteria, also declines faster.A2/ O technique can simultaneously complete the function of organic removal, denitrification denitrogenation, dephosphorization, and the premise of denitrogenation is NH3-N is completely nitrated in Aerobic Pond, then completes the function of denitrogenation, anaerobic pond and Aerobic Pond in anoxic pond and has combined phosphorus removal functional.
But, when water-inlet carbon source level is higher, A/A/O can obtain good Nitrogen/Phosphorus Removal, but when carbon-nitrogen ratio of intaking is relatively low, Nitrogen/Phosphorus Removal is unstable, and the polyP bacteria that the mixed liquor of sludge reflux can suppress releases phosphorus process, affects biological phosphor-removing effect.
Summary of the invention
For the deficiency overcoming prior art to exist, the invention provides a kind of sewage water intensification denitrification dephosphorization apparatus and technique.
A kind of sewage water intensification denitrification dephosphorization apparatus, described device includes being sequentially connected logical pretreatment pool, anaerobic pond, anoxic pond, Aerobic Pond, strain separating device, bacteria-algae synergism reactor, sedimentation tank and sterilization pool, described Aerobic Pond is connected with anoxic pond by mixed-liquor return pipeline, strain separating device is connected with anaerobic pond by the first sludge reflux pipeline, sedimentation tank is connected with bacteria-algae synergism reaction tank by the second sludge reflux pipeline, being equipped with corresponding sludge pump on first sludge reflux pipeline, the second sludge reflux pipeline, mixed-liquor return pipeline is provided with sewage pump.
As preferably, being provided with biologic packing material in described bacteria-algae synergism reaction tank.
A kind of sewage water intensification denitrification dephosphorization process, sewage first passes around pretreatment and enters anaerobic pond, and after carrying out hybrid reaction with the strain separating device mud that comes of backflow, sequentially pass through anoxic pond again, Aerobic Pond enters strain separating device, strain in mixed liquor is easily separated by strain separating device, the strain that density is big is deposited in bottom, it flow to anaerobic pond by blowback, the strain that density is little enters bacteria-algae synergism reaction tank together with current, then through sedimentation tank and disinfect rear water outlet, clarifier sludge is partly refluxed to bacterium algae concerted reaction pond.
As preferably, sewage enters anaerobic pond, releases entrance anoxic pond after phosphorus process with returned sludge mixing, carries out denitrification denitrogenation process with the mixed liquor of Aerobic Pond backflow in anoxic pond；Anoxic pond water outlet enters Aerobic Pond, and described Aerobic Pond is anoxia/Aerobic Pond, when inlet COD concentration is more than 250mg/L, anoxia/Aerobic Pond has been set to oxygen condition, when inlet COD concentration is less than 250mg/L, anoxia/Aerobic Pond is set to anaerobic condition.Aerobic Pond, according to carbon-nitrogen ratio (when COD concentration is less than 250mg/L), is set to anaerobic condition and guarantees denitrification effect by the present invention.
As preferably, Aerobic Pond adds special efficient denitrogenation dephosphorizing strain, described special efficient denitrogenation dephosphorizing strain is the combination in any of one or two or more kinds in bacillus megaterium, Klebsiella, pseudomonas pseudoalcaligenes, Denitrifying Phosphate Accumulating Organisms, magnificent series bacillus, and the addition of described special efficient denitrogenation dephosphorizing strain is volume ratio 1～10%.For improving technique Nitrogen/Phosphorus Removal further, adding special efficient denitrogenation dephosphorizing strain in Aerobic Pond, specially good effect strain plays its specially good effect dephosphorization and denitrification function so that this technique has more excellent Nitrogen/Phosphorus Removal.High-efficient denitrification and dephosphorization strain selected in the present invention can also is that company granted patent strain (ZL201310126043.X).
As preferably, being provided with biologic packing material in described bacteria-algae synergism reaction tank, described biologic packing material be combined stuffing, elastic filler, floating stuffing, bio-strip, filling ball, A Ke climing in one, biologic packing material specific surface area > 50m2/g.Bacteria-algae synergism reaction tank adopts biologic packing material, by physical absorption, part high-efficiency strain algae kind is adsorbed on above filler.
As preferably, a certain amount of microalgae is added in bacterium algae concerted reaction pond, described microalgae is spirulina, chlorella, scenedesmus, the combination in any of one or two or more kinds in Xi Zao, Nannochloropsis oceanica, Chlamydomonas reinhardtii, the algae that quivers, Dunaliella salina, and the dosage of described microalgae is volume ratio 0.5～15%.At A2It is provided with synergistic bacterium reactor after/O technique, utilizes and add microalgae, the existing synergistic bacterium effect with system.Independent bacterial biof iotalm and antibacterial are attached on algae, form helotism body, bacteria and algae film compares to bacterial biof iotalm more outstanding effect, bacterial biof iotalm without phosphor-removing effect, but bacteria and algae film is possible not only to dephosphorization and efficiencies of nitrogen removal is more than the several times of bacterial biof iotalm.
As preferably, the hydraulic detention time of anaerobic pond controls at 1.5～4 hours, the hydraulic detention time of anoxic pond controls at 3～6 hours, Aerobic Pond hydraulic detention time controls at 7～15 hours, the strain separating device mud-water separation time controls at 1～3h, and the reflux ratio of strain separating device is 30～70%, and the hydraulic detention time in bacterium algae concerted reaction pond controls at 4～7 hours, sedimentation tank control of reflux ratio is 40～60%, and Aerobic Pond return current ratio of the mixed liquid controls 50～150%.
As preferably, bacteria-algae synergism reaction tank microporous aeration disc mounted below, aeration rate is 0.8～2.0m3/min.By aerator aeration, increase water quality dissolved oxygen, make strain reaction uniformly fully.
As preferably, sterilization adopts chlorine dioxide generator, ozonator or ultraviolet radiation to carry out disinfection.
Sewage of the present invention first passes around pretreatment and enters the mud that the backflow of anaerobic pond and strain separating device comes and carry out hybrid reaction, sequentially pass through anoxic pond again, Aerobic Pond enters strain separating device, strain in mixed liquor is easily separated by strain separating device, guide shell and filler are set in strain separating device, improve mud-water separation effect；High density strain is deposited in bottom, flow to anaerobic pond by blowback, and the strain that density is less enters bacteria-algae synergism reaction tank together with current, biologic packing material it is provided with in pond, forming microalgae and synergistic bacterium effect in system, part forms bacteria and algae film, consolidation system denitrification dephosphorization function.Water outlet is through sedimentation tank and disinfects, and clarifier sludge is partly refluxed to bacterium algae concerted reaction pond.
The invention solves existing A2The poor denitrification and dephosphorization effect that/O Process for Treating Municipal exists, problem that cost is high.The present invention has the advantages such as process is efficient, stable water outlet, operating cost are low, and microalgae can absorb CO in its growth course2Lower carbon emission, be the process technique of a kind of economic and environment-friendly, sustainable cycle development.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but invention which is intended to be protected is not limited to this.
Embodiment 1
With reference to Fig. 1, a kind of sewage water intensification denitrification dephosphorization apparatus, described device includes being sequentially connected logical pretreatment pool, anaerobic pond, anoxic pond, Aerobic Pond, strain separating device, bacteria-algae synergism reactor, sedimentation tank and sterilization pool, described Aerobic Pond is connected with anoxic pond by mixed-liquor return pipeline, strain separating device is connected with anaerobic pond by the first sludge reflux pipeline, sedimentation tank is connected with bacteria-algae synergism reaction tank by the second sludge reflux pipeline, first sludge reflux pipeline, second sludge reflux pipeline is equipped with corresponding sludge pump, mixed-liquor return pipeline is provided with sewage pump.Being provided with biologic packing material in described bacteria-algae synergism reaction tank, bacteria-algae synergism reaction tank adopts biologic packing material, by physical absorption, part high-efficiency strain algae kind is adsorbed on above filler.
Embodiment 2
Certain domestic sewage in rural areas water quality is: pH7～8, COD200～400mg/L, TP1.0～5.0mg/L, NH3-N30～60mg/L, SS100～200mg/L, it is desirable to water outlet reaches one-level B standard in " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
Anaerobic pond is entered after the water inlet of above-mentioned sewage is first passed around pretreatment, with the returned sludge hybrid reaction of strain separating device in anaerobic pond, in anaerobic pond, main generation anaerobic hydrolysis reaction and polyP bacteria release phosphorus process, now activated sludge internal carbon source level reaches the highest, and the hydraulic detention time of anaerobic pond controlled at 1.5～4 hours；Anaerobic pond water outlet enters anoxic pond, and the mixed liquor come with Aerobic Pond backflow in anoxic pond carries out Denitrifying Phosphorus Removal, and the hydraulic detention time of anoxic pond controlled at 3～6 hours；nullAnoxic pond water outlet enters Aerobic Pond，Described Aerobic Pond is anoxia/Aerobic Pond，When inlet COD concentration is more than 250mg/L，Denitrification rate is very fast，Aerobic Pond is set to oxygen condition and has improved the removal effect of Organic substance and phosphorus further，When inlet COD concentration is less than 250mg/L，Denitrification rate is slower，Aerobic Pond is set to anaerobic condition and guarantees denitrification effect，Aerobic Pond adds and adds special efficient denitrogenation dephosphorizing strain，Described high-efficient denitrification and dephosphorization strain is bacillus megaterium、Klebsiella、Pseudomonas pseudoalcaligenes、Denitrifying Phosphate Accumulating Organisms、The combination in any of one or two or more kinds in magnificent series bacillus，Its addition is volume ratio 1～10%，Aerobic Pond hydraulic detention time controlled at 7～15 hours，It is fully contacted the time of reaction，Improve Nitrogen/Phosphorus Removal；Aerobic Pond mixed liquor is partly refluxed to anoxic pond.
Aerobic Pond water outlet enters strain separating device, microorganism in mixed liquor is screened by strain separating device, it is deposited in rapidly bottom strain separating device with the high density strain that polyP bacteria is representative, and the less strain of density is in top more slowly due to sedimentation velocity, the strain major part being deposited in strain separating device is back to anaerobic pond by sludge pump, discharge partly as excess sludge and realize dephosphorization, excess sludge accounts for the 2.0～10.0% of returned sludge, and the strain that density is little then enters bacteria-algae synergism reaction tank together in company with current；Be provided with biologic packing material in bacteria-algae synergism reaction tank, and add microalgae, described biologic packing material be combined stuffing, elastic filler, floating stuffing, bio-strip, filling ball, A Ke climing in one, its specific surface area > 50m2/ g, described microalgae is spirulina, chlorella, scenedesmus, the combination in any of one or two or more kinds in Xi Zao, Nannochloropsis oceanica, Chlamydomonas reinhardtii, the algae that quivers, Dunaliella salina, and its dosage is volume ratio 0.5～15%.The various microorganisms that microalgae flows into strain separating device carry out synergism, independent bacterial biof iotalm and antibacterial are attached on algae, form helotism body, bacteria and algae film compares to bacterial biof iotalm more outstanding effect, bacteria and algae film is possible not only to dephosphorization and efficiencies of nitrogen removal is the several times of bacterial biof iotalm, and the hydraulic detention time of bacteria-algae synergism reaction tank controlled at 4～7 hours；Bacteria-algae synergism reaction tank water outlet enters sedimentation tank and carries out mud-water separation, the biomembrane come off and strain separating device flow out part float and precipitate in sedimentation tank, it is back to bacteria-algae synergism reaction tank to increase bacterium algae sludge concentration, to improve the denitrogenation dephosphorizing ability of system by sludge pump intermittence.
Strain separating device realizes bacterial screening mainly by controlling the mud-water separation time, and the strain separating device mud-water separation time controls at 1～3h；Being provided with biologic packing material in bacteria-algae synergism reaction tank, filler provides the environment of bacterium algae growth；The reflux ratio of strain separating device is 30～70%, and sedimentation tank backflow controls 40～60%, and Aerobic Pond return current ratio of the mixed liquid controls 50～150%.Bacteria-algae synergism reaction tank microporous aeration disc mounted below, aeration rate is 0.8～2.0m3/min。
The denitrification dephosphorization technique A that above-mentioned sewage intercepting well is traditional2After/O processes, water outlet is extremely difficult to one-level B standard.But after this system process processes, water outlet is better than GB18918-2002 one-level B standard, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Embodiment 3
Certain hospital sewage water quality is pH5～6, COD800～1200mg/L, TP6.0～15.0mg/L, NH3-N50～80mg/L, SS150～300mg/L, it is desirable to after process, water outlet reaches pH6～9, COD < 100mg/L, TP < 1.0mg/L, NH3-N < 10mg/L, SS < 15mg/L.
Process technique with reference to embodiment 2, the hydraulic detention time of anaerobic pond controls at 3 hours, the hydraulic detention time of anoxic pond controls at 4.5 hours, the special efficient denitrogenation dephosphorizing strain added in Aerobic Pond is bacillus megaterium, and its addition is volume ratio 7.5%, and Aerobic Pond hydraulic detention time controls at 10 hours, the strain separating device mud-water separation time controls at 2h, the reflux ratio of strain separating device is 50%, and the biologic packing material in bacteria-algae synergism reaction tank is filling ball, and its specific surface area is 60m2/ g, described microalgae is spirulina, and its dosage is volume ratio 8.5%, and the hydraulic detention time of bacteria-algae synergism reaction tank controls at 5.5 hours, and sedimentation tank control of reflux ratio is 50%, and Aerobic Pond return current ratio of the mixed liquid controls 90%, and the aeration rate of microporous aeration disc is 1.3m3/min。
Utilize traditional denitrification dephosphorization technique A2After/O processes, water outlet (pH6.8, COD340mg/L, TP3.49mg/L, NH3-N22.6mg/L, SS30mg/L) do not reach required standard.But after this system process processes, water outlet pH7.2, COD76mg/L, TP0.51mg/L, NH3-N5.7mg/L, SS10mg/L, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Embodiment 4
Certain hospital sewage water quality is pH5～6, COD800～1200mg/L, TP6.0～15.0mg/L, NH3-N50～80mg/L, SS150～300mg/L, it is desirable to after process, water outlet reaches pH6～9, COD < 100mg/L, TP < 1.0mg/L, NH3-N < 10mg/L, SS < 15mg/L.
Process technique with reference to embodiment 2, the hydraulic detention time of anaerobic pond controls at 1.5 hours, the hydraulic detention time of anoxic pond controls at 3 hours, the special efficient denitrogenation dephosphorizing strain added in Aerobic Pond is Klebsiella, and its addition is volume ratio 2.5%, and Aerobic Pond hydraulic detention time controls at 8 hours, the strain separating device mud-water separation time controls at 1h, the reflux ratio of strain separating device is 30%, and the biologic packing material in bacteria-algae synergism reaction tank is combined stuffing, and its specific surface area is 70m2/ g, microalgae is chlorella, and its dosage is volume ratio 2.5%, and the hydraulic detention time of bacteria-algae synergism reaction tank controls at 4 hours, and sedimentation tank control of reflux ratio is 40%, and Aerobic Pond return current ratio of the mixed liquid controls 50%, and the aeration rate of microporous aeration disc is 0.8m3/min。
After this system process processes, water outlet pH7.9, COD88mg/L, TP0.67mg/L, NH3-N6.9mg/L, SS12mg/L, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Embodiment 5
Certain hospital sewage water quality is pH5～6, COD800～1200mg/L, TP6.0～15.0mg/L, NH3-N50～80mg/L, SS150～300mg/L, it is desirable to after process, water outlet reaches pH6～9, COD < 100mg/L, TP < 1.0mg/L, NH3-N < 10mg/L, SS < 15mg/L.
Process technique with reference to embodiment 2, the hydraulic detention time of anaerobic pond controls at 4 hours, the hydraulic detention time of anoxic pond controls at 6 hours, the special efficient denitrogenation dephosphorizing strain added in Aerobic Pond is pseudomonas pseudoalcaligenes, Denitrifying Phosphate Accumulating Organisms, pseudomonas pseudoalcaligenes addition is volume ratio 3.5%, Denitrifying Phosphate Accumulating Organisms addition is volume ratio 4.5%, Aerobic Pond hydraulic detention time controls at 14 hours, the strain separating device mud-water separation time controls at 3h, the reflux ratio of strain separating device is 70%, biologic packing material in bacteria-algae synergism reaction tank is floating stuffing, its specific surface area is 85m2/ g, microalgae is scenedesmus, Xi Zao, scenedesmus dosage is volume ratio 5.5%, seat algae dosage is volume ratio 6.5%, the hydraulic detention time of bacteria-algae synergism reaction tank controls at 7 hours, sedimentation tank control of reflux ratio is 60%, and Aerobic Pond return current ratio of the mixed liquid controls 150%, and the aeration rate of microporous aeration disc is 2.0m3/min。
After this system process processes, water outlet pH8.2, COD85mg/L, TP0.63mg/L, NH3-N7.1mg/L, SS13mg/L, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Embodiment 6
Certain printing and dyeing mill's sewage quality is pH9～10, COD1500～2000mg/L, TP4.0～10.0mg/L, NH3-N60～100mg/L, SS300～500mg/L, it is desirable to after process, water outlet reaches pH6～9, COD < 100mg/L, TP < 1.0mg/L, NH3-N < 15mg/L, SS < 10mg/L.
Process technique with reference to embodiment 2, the hydraulic detention time of anaerobic pond controls at 3.5 hours, the hydraulic detention time of anoxic pond controls at 4 hours, the special efficient denitrogenation dephosphorizing strain added in Aerobic Pond is bacillus megaterium, magnificent series bacillus, bacillus megaterium addition is volume ratio 2.5%, magnificent series bacillus addition is volume ratio 2.5%, Aerobic Pond hydraulic detention time controls at 12 hours, the strain separating device mud-water separation time controls at 2h, the reflux ratio of strain separating device is 50%, biologic packing material in bacteria-algae synergism reaction tank is bio-strip, its specific surface area is 75m2/ g, described microalgae is Chlamydomonas reinhardtii, and its dosage is volume ratio 10.5%, the hydraulic detention time of bacteria-algae synergism reaction tank controls at 5 hours, sedimentation tank control of reflux ratio is 50%, and Aerobic Pond return current ratio of the mixed liquid controls 100%, and the aeration rate of microporous aeration disc is 1.5m3/min。
Utilize traditional denitrification dephosphorization technique A2After/O processes, water outlet (pH8.6, COD405mg/L, TP4.66mg/L, NH3-N30.6mg/L, SS40mg/L) do not reach this and require standard.But after this system process processes, water outlet pH7.4, COD48mg/L, TP0.36mg/L, NH3-N5.6mg/L, SS3mg/L, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Embodiment 7
Certain printing and dyeing mill's sewage quality is pH9～10, COD1500～2000mg/L, TP4.0～10.0mg/L, NH3-N60～100mg/L, SS300～500mg/L, it is desirable to after process, water outlet reaches pH6～9, COD < 100mg/L, TP < 1.0mg/L, NH3-N < 15mg/L, SS < 10mg/L.
Process technique with reference to embodiment 2, the hydraulic detention time of anaerobic pond controls at 2.5 hours, the hydraulic detention time of anoxic pond controls at 3.5 hours, the special efficient denitrogenation dephosphorizing strain added in Aerobic Pond is pseudomonas pseudoalcaligenes, and its addition is volume ratio 3%, and Aerobic Pond hydraulic detention time controls at 10 hours, the strain separating device mud-water separation time controls at 2h, the reflux ratio of strain separating device is 50%, and the biologic packing material in bacteria-algae synergism reaction tank is bio-strip, and its specific surface area is 70m2/ g, described microalgae is spirulina, chlorella, spirulina dosage is volume ratio 1.5%, chlorella dosage is volume ratio 1.5%, the hydraulic detention time of bacteria-algae synergism reaction tank controls at 4.5 hours, sedimentation tank control of reflux ratio is 45%, Aerobic Pond return current ratio of the mixed liquid controls 75%, and the aeration rate of microporous aeration disc is 1.0m3/min。
After this system process processes, water outlet pH8.1, COD82mg/L, TP0.71mg/L, NH3-N8.6mg/L, SS5mg/L, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Embodiment 8
Certain printing and dyeing mill's sewage quality is pH9～10, COD1500～2000mg/L, TP4.0～10.0mg/L, NH3-N60～100mg/L, SS300～500mg/L, it is desirable to after process, water outlet reaches pH6～9, COD < 100mg/L, TP < 1.0mg/L, NH3-N < 15mg/L, SS < 10mg/L.
Process technique with reference to embodiment 2, the hydraulic detention time of anaerobic pond controls at 3.5 hours, the hydraulic detention time of anoxic pond controls at 5.5 hours, the special efficient denitrogenation dephosphorizing strain added in Aerobic Pond is pseudomonas pseudoalcaligenes, its addition is volume ratio 13%, Aerobic Pond hydraulic detention time controls at 8.5 hours, the strain separating device mud-water separation time controls at 2.5h, the reflux ratio of strain separating device is 65%, biologic packing material in bacteria-algae synergism reaction tank is combined stuffing, and its specific surface area is 90m2/ g, described microalgae is spirulina, chlorella, quiver algae, spirulina dosage is volume ratio 3.5%, chlorella dosage is volume ratio 2.5%, the algae dosage that quivers is volume ratio 1.5%, the hydraulic detention time of bacteria-algae synergism reaction tank controls at 6.5 hours, sedimentation tank control of reflux ratio is 55%, Aerobic Pond return current ratio of the mixed liquid controls 135%, and the aeration rate of microporous aeration disc is 1.8m3/min。
After this system process processes, water outlet pH8.3, COD75mg/L, TP0.66mg/L, NH3-N7.5mg/L, SS6mg/L, treatment effect is substantially better than the effect after traditional denitrification dephosphorization technique processes.
Claims (10)
1. a sewage water intensification denitrification dephosphorization apparatus, it is characterized in that: described device includes being sequentially connected logical pretreatment pool, anaerobic pond, anoxic pond, Aerobic Pond, strain separating device, bacteria-algae synergism reactor, sedimentation tank and sterilization pool, described Aerobic Pond is connected with anoxic pond by mixed-liquor return pipeline, strain separating device is connected with anaerobic pond by the first sludge reflux pipeline, sedimentation tank is connected with bacteria-algae synergism reaction tank by the second sludge reflux pipeline, first sludge reflux pipeline, second sludge reflux pipeline is equipped with corresponding sludge pump, mixed-liquor return pipeline is provided with sewage pump.
2. sewage water intensification denitrification dephosphorization apparatus according to claim 1, it is characterised in that: it is provided with biologic packing material in described bacteria-algae synergism reaction tank.
3. device described in a claim 1 is used for sewage water intensification denitrification dephosphorization process, it is characterized in that: sewage first passes around pretreatment and enters anaerobic pond, and after carrying out hybrid reaction with the strain separating device mud that comes of backflow, sequentially pass through anoxic pond again, Aerobic Pond enters strain separating device, strain in mixed liquor is easily separated by strain separating device, the strain that density is big is deposited in bottom, it flow to anaerobic pond by blowback, the strain that density is little enters bacteria-algae synergism reaction tank together with current, then through sedimentation tank and disinfect rear water outlet, clarifier sludge is partly refluxed to bacterium algae concerted reaction pond.
4. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterised in that: sewage enters anaerobic pond, releases entrance anoxic pond after phosphorus process with returned sludge mixing, carries out denitrification denitrogenation process with the mixed liquor of Aerobic Pond backflow in anoxic pond；Anoxic pond water outlet enters Aerobic Pond, and described Aerobic Pond is anoxia/Aerobic Pond, when inlet COD concentration is more than 250mg/L, anoxia/Aerobic Pond has been set to oxygen condition, when inlet COD concentration is less than 250mg/L, anoxia/Aerobic Pond is set to anaerobic condition.
5. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterized in that: Aerobic Pond adds special efficient denitrogenation dephosphorizing strain, described special efficient denitrogenation dephosphorizing strain is the combination in any of one or two or more kinds in bacillus megaterium, Klebsiella, pseudomonas pseudoalcaligenes, Denitrifying Phosphate Accumulating Organisms, magnificent series bacillus, and the addition of described special efficient denitrogenation dephosphorizing strain is volume ratio 1～10%.
6. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterized in that: in described bacteria-algae synergism reaction tank, be provided with biologic packing material, described biologic packing material be combined stuffing, elastic filler, floating stuffing, bio-strip, filling ball, A Ke climing in one, biologic packing material specific surface area > 50m2/g。
7. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterized in that: in bacterium algae concerted reaction pond, add a certain amount of microalgae, described microalgae is the combination in any of one or two or more kinds in spirulina, chlorella, scenedesmus, Xi Zao, Nannochloropsis oceanica, Chlamydomonas reinhardtii, the algae that quivers, Dunaliella salina, and the dosage of described microalgae is volume ratio 0.5～15%.
8. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterized in that: the hydraulic detention time of anaerobic pond controls at 1.5～4 hours, the hydraulic detention time of anoxic pond controls at 3～6 hours, Aerobic Pond hydraulic detention time controls at 7～15 hours, the strain separating device mud-water separation time controls at 1～3h, the reflux ratio of strain separating device is 30～70%, the hydraulic detention time in bacterium algae concerted reaction pond controls at 4～7 hours, sedimentation tank control of reflux ratio is 40～60%, and Aerobic Pond return current ratio of the mixed liquid controls 50～150%.
9. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterised in that: bacteria-algae synergism reaction tank microporous aeration disc mounted below, aeration rate is 0.8～2.0m3/min。
10. sewage water intensification denitrification dephosphorization process according to claim 3, it is characterised in that: sterilization adopts chlorine dioxide generator, ozonator or ultraviolet radiation to carry out disinfection.
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