CN108057414A - A kind of device and method that nitrogen phosphorus in waste water is recycled using ammoniomagnesium phosphate crystal - Google Patents
A kind of device and method that nitrogen phosphorus in waste water is recycled using ammoniomagnesium phosphate crystal Download PDFInfo
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- CN108057414A CN108057414A CN201711374167.4A CN201711374167A CN108057414A CN 108057414 A CN108057414 A CN 108057414A CN 201711374167 A CN201711374167 A CN 201711374167A CN 108057414 A CN108057414 A CN 108057414A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 66
- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000013078 crystal Substances 0.000 title claims abstract description 10
- 239000010452 phosphate Substances 0.000 title claims abstract description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 9
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 title abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 24
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 claims abstract description 23
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 19
- 238000002425 crystallisation Methods 0.000 claims abstract description 14
- 229910052567 struvite Inorganic materials 0.000 claims abstract description 14
- 238000005273 aeration Methods 0.000 claims abstract description 13
- 230000008025 crystallization Effects 0.000 claims abstract description 12
- 239000011777 magnesium Substances 0.000 claims abstract description 12
- CUXQLKLUPGTTKL-UHFFFAOYSA-M microcosmic salt Chemical compound [NH4+].[Na+].OP([O-])([O-])=O CUXQLKLUPGTTKL-UHFFFAOYSA-M 0.000 claims abstract description 11
- 238000005276 aerator Methods 0.000 claims abstract description 9
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 239000013049 sediment Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 abstract description 5
- LWNCNSOPVUCKJL-UHFFFAOYSA-N [Mg].[P] Chemical compound [Mg].[P] LWNCNSOPVUCKJL-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 15
- 229910052698 phosphorus Inorganic materials 0.000 description 15
- 239000011574 phosphorus Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000003337 fertilizer Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012851 eutrophication Methods 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 230000007115 recruitment Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- DOZVDOMORKXFBJ-UHFFFAOYSA-N [NH4+].[Mg].O.[PH2](=O)[O-] Chemical compound [NH4+].[Mg].O.[PH2](=O)[O-] DOZVDOMORKXFBJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000002921 fermentation waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 150000003017 phosphorus Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2455—Stationary reactors without moving elements inside provoking a loop type movement of the reactants
- B01J19/246—Stationary reactors without moving elements inside provoking a loop type movement of the reactants internally, i.e. the mixture circulating inside the vessel such that the upward stream is separated physically from the downward stream(s)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- 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
- C02F2001/5218—Crystallization
-
- 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
Abstract
The invention discloses a kind of device and methods that nitrogen phosphorus in waste water is recycled using ammoniomagnesium phosphate crystal, belong to technical field of sewage.The reactor of the present invention includes reactor body, aerator, wastewater trough, lye tank (vat) and pharmacy slot；Using the device of nitrogen phosphorus in the struvite crystallization recycling waste water of the present invention, magnesium salts is only added, it is 1.38 to keep magnesium phosphorus ratio, terminal pH=9, aeration reaction 20min, ammonia nitrogen removal frank 24.08%, inorganic tp removal rate 90.13% obtains in sediment guanite purity up to 89.14%.If supplementing microcosmic salt and magnesium salts, N is controlled:Mg:P is 1:1.12:0.98, terminal pH=9, aeration reaction 20min, ammonia nitrogen removal frank 93.63% after secondary cycle, inorganic tp removal rate 90.02%, guanite purity is up to 87.19%.
Description
Technical field
The present invention relates to a kind of device and methods that nitrogen phosphorus in waste water is recycled using ammoniomagnesium phosphate crystal, belong to sewage disposal
Technical field.
Background technology
Phosphorus is one of indispensable element of living matter, is limited resources non-renewable on the earth.Meanwhile nitrogen, phosphorus
Nutrients is waited to be discharged into environment with sewage and cause body eutrophication phenomenon getting worse.Therefore, realize and nitrogen is recycled from sewage
Phosphorus can prevent body eutrophication or realize the sustainable use of phosphorus, receive significant attention.
Various in the method for phos-phate forms recycling P elements, struvite crystallization method is since its phosphorus content is high and can be straight
It connects or is used for agriculture and forestry as fertilizer indirectly and receives favor.
Guanite (MAP) is also known as six hypophosphite monohydrate ammonium magnesium (MgNH4PO4·6H2O), it is a kind of white crystal of low solubility
Mineral, as Mg in water2+、NH4 +And PO4 3-It, will spontaneous crystallization generation guanite knot when ion concentration is more than solubility limit value
Crystalline substance precipitation.The fabulous slow release fertilizer of the struvite crystallization that finally obtains, will not damage root system of plant, and it is insoluble in
The characteristic of water will not cause body eutrophication, therefore be highly suitable as the phosphate fertilizer of the vegetation such as gardens, nursery, can also be made
Detergent, cosmetics and animal feed.
As a kind of potential fertilizer, existing Duo Jia sewage treatment plants recycle it to be studied guanite.Cause
This, it is method for treating water both with a kind of ecology and economic benefit to remove nitrogen phosphorus in waste water using struvite crystallization method.
The content of the invention
The present invention first purpose be to provide a kind of reactor for ammoniomagnesium phosphate crystal, including reactor body,
Aerator, wastewater trough, lye tank (vat) and pharmacy slot；The reactor body includes the inner cylinder and outer barrel do not closed up and down；It is interior
Cylinder is arranged at outer barrel, and for inner cylinder with being flushed at the top of outer barrel, the high cylinder for being less than outer barrel of cylinder of inner cylinder is high；Aerator, lye
Slot and pharmacy slot are separately positioned on the outside of reactor body, and pass through pipeline and stretch in the inner cylinder of reactor；The waste water
Slot is connected by pipeline with the outer barrel of reactor.
In one embodiment of the invention, water inlet, sample tap and water outlet are set respectively on the side wall of outer barrel；Institute
State the lower part that water inlet is arranged at outer tube side wall；The water outlet is arranged at the top of outer barrel；The sample tap sets at least one
It is a.
In one embodiment of the invention, the bottom of outer barrel is tapered, sets precipitation outlet.
In one embodiment of the invention, the outer barrel is glass material, and shape is in up big and down small tubular.
In one embodiment of the invention, the inner cylinder is metal material, by the inner cylinder lower part that is coaxially disposed and interior
Cylinder top composition, the diameter on inner cylinder top are more than the diameter of inner cylinder lower part, the bottom on the inner cylinder top and the top of inner cylinder lower part
End is connected by connecting plate；The both ends of the connecting plate respectively with the outer tube wall of inner cylinder lower end surface and the inner tube wall on inner cylinder top
It is fixed.
In one embodiment of the invention, the connecting plate sets at least three along the formed symmetrical of metal inner cylinder.
In one embodiment of the invention, reactor head sets lid.
In one embodiment of the invention, aerator is stretched into the part of metal inner cylinder by long tube and also sets up stirring
Paddle.
Second object of the present invention is to provide a kind of method of ammonia nitrogen and Phos in recycling waste water, is using the bird
Coprolite crystallization reactor carries out wastewater treatment.
In one embodiment of the invention, the method is that waste water is passed through reaction from the water inlet of reactor bottom
Device so that waste water liquid level is higher than water outlet liquid level, magnesium salts, microcosmic salt in pharmacy slot is added in the waste water of inside reactor, by alkali
In the waste water of lye addition inside reactor in liquid bath and pH is controlled to maintain 9.0~10.0；Aeration reaction 20min is controlled,
So that waste water circulates in the reactor, 30min is stood after reaction, and waste water is arranged from the water outlet of reactor top
Go out, sediment is discharged from bottom.
In one embodiment of the invention, P is controlled:N is 0.87~1.06；Specially 0.87,0.98 or 1.06.
In one embodiment of the invention, Mg is controlled:N is 0.86~1.73.
In one embodiment of the invention, Mg is controlled：N=1.38, adjusting wastewater pH to 9, aeration reaction 20min,
Terminal pH is controlled to stop 30min after reaction 9 or so, waste water is discharged from the water outlet of reactor upper end, crystallization is heavy
It forms sediment and is discharged from reactor lowermost end.
In one embodiment of the invention, N is controlled:Mg:P=1:1.12:0.98, wastewater pH is adjusted to 9, and aeration is anti-
Answering 20min, control terminal pH is stopped 30min, waste water is discharged from the water outlet of reactor upper end after reaction 9 or so,
Crystalline deposit is discharged from reactor lowermost end.
In one embodiment of the invention, pH=7~7.5 of the waste water, COD=(850 ± 200) mgL-1,
TN=(575 ± 25) mgL-1, NH4 +- N=(850 ± 200) mgL-1, TP=(110 ± 15) mgL-1, PO4 3-=(100 ±
15)mg·L-1, Mg2+=(30 ± 5) mgL-1, Ca2+=(95 ± 5) mgL-1, t=(32.5 ± 2.5) DEG C.
In one embodiment of the invention, nitrogen phosphorus mainly exists in the form of ammonia nitrogen and Phos in water sample, n (NH4 -):
n(PO4 3-):n(Mg2+) it is about 60:3:2.
The present invention also provides application of the method in terms of wastewater treatment.
Advantageous effect：The device of the invention can recycle ammonia nitrogen and Phos in waste water in the form of struvite crystallization,
Since guanite is good slow-release fertilizer, it can be used for flowers and agricultural production, therefore realize the recycling of waste water so that
Benefits in economic and social terms integration.The device of nitrogen phosphorus, handles ammonia nitrogen in waste water concentration in the struvite crystallization recycling waste water of the present invention
500mg/L, Phos 100mg/L only add magnesium salts, and it is 1.38 to keep magnesium phosphorus ratio, terminal pH=9, aeration reaction 20min, ammonia
Nitrogen removal efficiency 24.08%, inorganic tp removal rate 90.13% obtain in sediment guanite purity up to 89.14%.If supplement phosphorus
Salt and magnesium salts control N:Mg:P is 1:1.12:0.98, terminal pH=9, aeration reaction 20min, ammonia nitrogen is gone after secondary cycle
Except rate 93.63%, inorganic tp removal rate 90.02%, guanite purity is up to 87.19%.
Description of the drawings
Fig. 1 is the structure diagram of the reactor body of the present invention；Wherein, A, inner cylinder top view；B, the inner cylinder side of capping
View；C, outer tube structure schematic diagram；1, outer barrel；2, inner cylinder lower part；3, connecting plate；4, inner cylinder top；10, precipitation outlet；11, lid
Son；12, water outlet；13, sample tap；14, water inlet；
Fig. 2 is the structural scheme of mechanism of the reactor body of the present invention；1, outer barrel；3, connecting plate；10, precipitation outlet；12, go out
The mouth of a river；13, sample tap；14, water inlet；
Fig. 3 is a kind of reactor schematic diagram for struvite crystallization of the present invention；4, inner cylinder top；5, aerator；
6, lye tank (vat)；7, wastewater trough；8, pharmacy slot；9, metering pump；
Fig. 4 is nitrogen phosphorus ligands effect under different microcosmic salt dosages；
Fig. 5 is the removal effect of nitrogen phosphorus under different magnesium salts dosage；
Fig. 6 is removal efficiency of nitrogen and phosphorus under different terminal pH.
Specific embodiment
Embodiment 1
As shown in Figs. 1-3, a kind of reactor for struvite crystallization of the invention includes inner cylinder and outer barrel；Inner cylinder and outer
Cylinder is cylindrical in shape structure, does not close up and down；Inner cylinder is flushed with the top of outer barrel 1, and the high cylinder for being less than outer barrel 1 of cylinder of inner cylinder is high；Outside
Cylinder 1 is glass material, and shape is in up big and down small tubular；Inner cylinder is metal material, by the inner cylinder lower part 2 being coaxially disposed and inner cylinder
Top 4 forms, and the diameter on inner cylinder top 4 is more than the diameter of inner cylinder lower part 2, bottom and the inner cylinder lower part 2 on the inner cylinder top 4
Top is connected by connecting plate 3, the both ends of connecting plate 3 respectively with the outer tube wall of 2 end face of inner cylinder lower part and the inner cylinder on inner cylinder top 4
Wall is fixed；The connecting plate sets at least three along metal inner cylinder (5) formed symmetrical.
Cylinder dimensions r × H=7.5cm × the 10cm on 1 top of outer barrel, cylinder r × H=4cm of 1 lower part of outer barrel ×
20m, the width of connecting plate 3 is 1cm, and center section connects the high H=5cm of round platform, reactor the lowermost conical base H=5cm,
Water outlet, water inlet, sample tap inside diameter 1cm, precipitation outlet inside diameter 2cm.R × the H=4.5cm on inner cylinder top 4 ×
10cm, r × H=2.5cm × 20cm of inner cylinder lower part 2, size r × H=9cm × 1m of wooden lid 11,11 center of lid have
One hole (r=1.5cm), convenient for being aerated into medicine.
Water inlet 14, sample tap 13 and water outlet 12 are set on the side wall of outer barrel 1；Water inlet 14 is arranged at sidewall of reactor
Lower part, water outlet 12 is arranged at the top of side wall, and sample tap 13 sets at least one；The bottom of reactor sets precipitation outlet
10；Reactor head sets lid 11.The device sets aerator 5, and aerator is stretched by long tube in metal inner cylinder
Portion stretches into the part inside metal inner cylinder and sets agitating device, not only plays stirring action, also so that waste water cycles in the reactor
Flowing accelerates reaction.Three metering pumps 9 are connected respectively by pipeline with wastewater trough 7, lye tank (vat) 6 and pharmacy slot 8, and pass through pipe
Road adds in the NaOH solution in waste water, lye tank (vat) 6 in wastewater trough 7, the magnesium salts in pharmacy slot 8 or microcosmic salt in reactor.
Nitrogen phosphorus in 2 struvite crystallization of embodiment recycling waste water
Using device shown in Fig. 3, waste water is passed through reactor bottom by metering pump from water inlet, and waste water liquid level is made to be higher than
Microcosmic salt and magnesium salts are modulated into slurries by the mouth of a river in the desired amount, are successively added in waste water, and it is 9 to adjust pH value, aeration reaction 20min.
Since reaction is the process of a consumption alkali, it is 9 to need constantly to add lye to control endpoint pH in reaction process, reaction knot
30min is stopped after beam.
Experiment wastewater be certain grain fermentation waste water, waste water quality：PH=7~7.5, COD=(850 ± 200) mgL-1, TN
=(575 ± 25) mgL-1, NH4 +- N=(850 ± 200) mgL-1, TP=(110 ± 15) mgL-1, PO4 3-=(100 ±
15)mg·L-1, Mg2+=(30 ± 5) mgL-1, Ca2+=(95 ± 5) mgL-1, t=(32.5 ± 2.5) DEG C.Nitrogen phosphorus in water sample
Mainly exist in the form of ammonia nitrogen and Phos, n (NH4 -):n(PO4 3-):n(Mg2+) it is about 60:3:2；Water quality partial neutral；Water temperature is fitted
Close struvite crystallization；Contain Mg in water sample2+And Ca2+。
Influence of the different microcosmic salt dosages of embodiment 3 to removal rate
Ammonia nitrogen and content of inorganic phosphorus difference are larger in waste water, and ammonia nitrogen is improved by supplementing the amount of Phosphorus From Wastewater salt and magnesium salts
Removal rate.
Control condition terminal pH=9.0, n (Mg2+):n(NH4 +)=1:1, mixing speed 100r/min, 21 DEG C of water temperature.
The results are shown in Figure 4, works as P:The molar ratio of N for 1.06 (when, ammonia nitrogen is down to 69.12mg/L, ammonia nitrogen by 500mg/L
Removal rate is up to 86.18%, but the removal rate of phosphorus is compared with P:97.31% during N=0.87 reduces instead, at this time inorganic tp removal rate
For 79.08%.Work as P:During N=0.98, ammonia nitrogen is down to 77.91mg/L by 500mg/L, removal rate up to 84.42%, Phos from
100mg/L is down to 5.53mg/L, and removal rate is up to 94.47%.When microcosmic salt dosage gradually increases, ammonia nitrogen removal frank also increases by a small margin
Add, but inorganic phosphorus in wastewater content increases instead, phosphorus content in even above intaking.
Influence of the different different magnesium salts dosages of embodiment 4 to removal rate
In P:N be 0.98 under conditions of under, adjust magnesium salts magnitude of recruitment, control reaction pH=9.0, n (PO4 3-):n(NH4+)=
0.98, mixing speed 100r/min, 21 DEG C of water temperature.
The results are shown in Figure 5, and the removal rate of ammonia nitrogen and Phos gradually increases with the increase of magnesium salts magnitude of recruitment.When rubbing
You compare Mg:During N=1.12, ammonia nitrogen is down to 79.83mg/L by 500mg/L, and up to 84.03%, Phos drops removal rate from 100mg/L
To 6.74mg/L, removal rate is up to 93.26%.With the further increase of magnesium salts magnitude of recruitment, ammonia nitrogen removal effect is basicly stable, nothing
The removal effect of machine phosphorus only has the promotion of very little amplitude.
Influences of the 5 difference pH of embodiment to removal rate
The additive amount of lye is adjusted, controls pH different in reactor.As shown in Figure 6.When reacting pH=9, ammonia is removed
The effect of nitrogen is best, and removal rate is up to 81.54%, and inorganic tp removal rate is up to 93.13%.Ammonia nitrogen removal frank is with the liter of pH value in reaction
Height is begun to decline, and the removal rate of Phos has therewith to be raised by a small margin.As reaction pH>When 9, Ca in solution2+、Mg2+Meeting and PO4 3-
Generate hydroxyapatite (Ca5(PO4)3OH)、Mg(OH)2、Mg3(PO4)2Deng as reaction pH>When 9.5, the NH in solution4 +It can become
Gaseous state NH3。
Embodiment 6
To remove Phosphorus From Wastewater operating procedure as the main purpose:By waste water from reactor bottom metering pump input reactor
Magnesium salts is made slurries and is added into waste water (Mg by inside：N=1.38), wastewater pH is adjusted to 9, aeration reaction 20min so that useless
Water circulates in the reactor, lye is continuously replenished during aeration reaction, terminal pH is in 9 or so, reaction process for control
Effluent monitoring change of water quality is taken in sample tap.30min is stopped after reaction, and waste water is arranged from the water outlet of reactor upper end
Go out, measure the amount of remaining ammonia nitrogen and Phos in waste water, crystalline deposit from reactor lowermost end is discharged, birds droppings is measured after air-drying
Stone content.
To remove in waste water ammonia nitrogen operating procedure as the main purpose:Waste water from reactor bottom with metering pump is inputted and is reacted
Inside device, slurries are made in microcosmic salt and magnesium salts and are successively added into waste water (N:Mg:P=1:1.12:0.98) wastewater pH, is adjusted to 9,
Aeration reaction 20min so that waste water circulates in the reactor, and lye is continuously replenished during aeration reaction, controls terminal
PH takes effluent monitoring change of water quality in 9 or so, reaction process in sample tap.30min is stopped after reaction, by waste water from anti-
The water outlet of device upper end is answered to discharge, measures the amount of remaining ammonia nitrogen and Phos in waste water, by crystalline deposit from reactor lowermost end
Discharge measures struvite content after air-drying.
The results show：Only for the purpose of addition magnesium salts removal inorganic phosphorus in wastewater, inorganic tp removal rate 90.13%, ammonia nitrogen is gone
Except rate 24.08%, struvite content is up to 89.14% in crystalline deposit.Supplement microcosmic salt and magnesium salts using remove in waste water ammonia nitrogen as
Main purpose, ammonia nitrogen removal frank is up to 93.63%, inorganic tp removal rate 90.02%, and struvite content is in crystalline deposit
87.19%.
Although the present invention has been described by way of example and in terms of the preferred embodiments, it is not limited to the present invention, any to be familiar with this skill
The people of art without departing from the spirit and scope of the present invention, can do various change and modification, therefore the protection model of the present invention
Enclosing be subject to what claims were defined.
Claims (10)
1. a kind of reactor for ammoniomagnesium phosphate crystal, which is characterized in that including reactor body, aerator, wastewater trough,
Lye tank (vat) and pharmacy slot；The reactor body includes inner cylinder and outer barrel；Inner cylinder is arranged at the top of outer barrel, inner cylinder and outer barrel
Portion flushes, and the high cylinder for being less than outer barrel of cylinder of inner cylinder is high；Aerator, lye tank (vat) and pharmacy slot are separately positioned on reactor body
Outside, and pass through pipeline and stretch in the inner cylinder of reactor；The wastewater trough is connected by pipeline with the outer barrel of reactor.
2. the reactor according to claim 1 for ammoniomagnesium phosphate crystal, which is characterized in that the outer barrel shape is presented
Small tubular under big；The inner cylinder is metal material, is made of the inner cylinder lower part and inner cylinder top that are coaxially disposed, inner cylinder top
Diameter is more than the diameter of inner cylinder lower part, and the bottom on the inner cylinder top is connected with the top of inner cylinder lower part by connecting plate；It is described
Inner tube wall of the both ends of connecting plate respectively with the outer tube wall of inner cylinder lower end surface and inner cylinder top is fixed.
3. the reactor according to claim 2 for ammoniomagnesium phosphate crystal, which is characterized in that on the side wall of outer barrel respectively
Water inlet, sample tap and water outlet are set；The water inlet is arranged at the lower part of outer tube side wall；The water outlet is arranged at outer barrel
Top.
4. the reactor according to claim 4 for ammoniomagnesium phosphate crystal, which is characterized in that the bottom of outer barrel is in cone
Shape sets precipitation outlet.
5. a kind of method of ammonia nitrogen and Phos in recycling waste water, which is characterized in that be any described using Claims 1 to 4
Struvite crystallization reactor carry out wastewater treatment.
6. according to the method described in claim 5, it is characterized in that, place magnesium salts, microcosmic salt in pharmacy slot, alkali is added in lye tank (vat)
Liquid；Waste water is passed through reactor from the water inlet of reactor bottom so that waste water liquid level is higher than water outlet liquid level, will be in pharmacy slot
Magnesium salts, microcosmic salt are added in the waste water of inside reactor, the lye in lye tank (vat) are added in the waste water of inside reactor and controlled
PH maintains 9.0~10.0；Control aeration reaction 20min so that waste water circulates in the reactor, stands after reaction
30min discharges waste water from the water outlet of reactor top, and sediment is discharged from bottom.
7. according to the method described in claim 5, it is characterized in that, control the P of waste water in reactor:N is 0.87~1.06；Control
Mg processed:N is 0.86~1.73.
8. according to any method of claim 5~7, which is characterized in that the pH of the waste water is 7~7.5, COD 850
±200mg·L-1, TN is 575 ± 25mgL-1, NH4 +- N is 850 ± 200mgL-1, TP is 110 ± 15mgL-1, PO4 3-
For (100 ± 15) mgL-1, Mg2+For (30 ± 5) mgL-1, Ca2+For (95 ± 5) mgL-1。
9. according to the method described in claim 8, it is characterized in that, n (NH in the waste water4 -):n(PO4 3-):n(Mg2+) be for
60:2~5:2~5.
10. the application of claim 5~7,9 any the methods in terms of wastewater treatment.
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