CN1597545A - Phosphorus containing waste water treatment method and its application of recovered phosphorus product - Google Patents
Phosphorus containing waste water treatment method and its application of recovered phosphorus product Download PDFInfo
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- CN1597545A CN1597545A CN 200410009462 CN200410009462A CN1597545A CN 1597545 A CN1597545 A CN 1597545A CN 200410009462 CN200410009462 CN 200410009462 CN 200410009462 A CN200410009462 A CN 200410009462A CN 1597545 A CN1597545 A CN 1597545A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 35
- 239000011574 phosphorus Substances 0.000 title claims description 34
- 229910052698 phosphorus Inorganic materials 0.000 title claims description 34
- 238000004065 wastewater treatment Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 23
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 15
- 239000002351 wastewater Substances 0.000 claims description 38
- 238000003756 stirring Methods 0.000 claims description 14
- 238000005189 flocculation Methods 0.000 claims description 11
- 230000016615 flocculation Effects 0.000 claims description 10
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002686 phosphate fertilizer Substances 0.000 claims description 3
- -1 phosphoric acid ion Chemical class 0.000 claims description 3
- 239000010865 sewage Substances 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 abstract 1
- 239000001263 FEMA 3042 Substances 0.000 abstract 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 150000002505 iron Chemical class 0.000 abstract 1
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 abstract 1
- 229940033123 tannic acid Drugs 0.000 abstract 1
- 235000015523 tannic acid Nutrition 0.000 abstract 1
- 229920002258 tannic acid Polymers 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 230000001376 precipitating effect Effects 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000012851 eutrophication Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000031018 biological processes and functions Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 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
- 229920002253 Tannate Polymers 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 159000000013 aluminium salts Chemical group 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 229910052816 inorganic phosphate Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A process for treating P-contained sewage featurs that the iron salt is used as its flocculant and the quaternary ammonium salt and tannic acid are used as its co-flocculant for removing P compounds frmo water and decreasing the turbility of water and the content of iron in water. The appliction of said process in recovering P from sewage is also disclosed.
Description
Technical field
The present invention relates to the phosphorus removing method of phosphoric acid ion waste water or treating water and the application of reclaiming the phosphorus product thereof, belong to technical field of sewage in the environment protection.
Technical background
As everyone knows, one of reason of rivers and creeks, water body in lake eutrophication is because the existence of P contained compound.Phosphide derives from the loss of phosphorus in resident's domestic water, trade effluent and the soil.Therefore, be from one of effective measure of watershed management body eutrophication to sanitary sewage and trade effluent dephosphorization.The removal of phosphorus mainly contains two kinds of biological process and chemical methods, and biological phosphate-eliminating is a kind of method of relatively economical, but the clearance of phosphorus has only 30%-40% usually, and single biological process dephosphorization process is difficult to reach the emission standard that is lower than 1mg/L.Chemical process is by adding one or several materials, phosphor in sewage is become suspended particle, remove after the precipitate and separate, and physics-chemical method can drop to phosphorus content the emission standard that is lower than 1mg/L.Chemical dephosphorization adds a difference by medicament and is divided into preceding precipitating, synchronous precipitating and three kinds of technologies of back precipitating.Dephosphorization synchronously promptly is synchronous precipitating, and it is present most widely used chemical dephosphorization technology, account for abroad chemical dephosphorization technology 50% (Tang Guoqiang. the design calculation of chemical dephosphorization. water supply and drainage, 2000,2 (9): 7-21).Dephosphorization synchronously is that the precipitating medicament is added in aeration tank water outlet (being the second pond water inlet), and individual cases also have medicament is added in the water inlet of aeration tank or in the returned sluge channel.Medicament commonly used generally is aluminium salt, molysite and lime.Because the molysite low price is the microorganism growth trace elements necessary simultaneously, molysite can make active sludge weight increase simultaneously, avoid activated sludge bulking, and can the stimulating organism activity, to microorganism toxicological harmless effect, so molysite is good chemical dephosphorization medicament.But in traditional biologic process for treating sewage, molysite adds the pH value that can reduce water, though the excessive chemical dephosphorization that helps of dosage can cause disadvantageous effect to biological treatment, and treating water is yellow.
Sludge reduction or the sewage disposal new technology of not producing excess sludge are focuses of current research, adopt aerobic-anaerobion repeatedly the coupling treatment of sewage water technology can realize removing the organic while and do not produce or produce less excess sludge (application number: 200310121766.7), but because the growth and the extinction of mud are in running balance, the phosphorus concentration of former water and treating water is constant, and the phosphorus major part was present in the treating water with the form of inorganic phosphate radical after the aerobic-anaerobion of process was coupled repeatedly and handles.Therefore ,-anaerobion aerobic for guaranteeing be the application of coupling treatment of sewage water novel process repeatedly, and the phosphorus in the treating water must be removed just can reach the emission request that satisfies phosphorus.
Aguilar etc. studies show that, when the form of phosphorus with PO
4 3-Form when existing, dephosphorization is mainly with FePO
4Form be main (Aguilar M.I., Saez J., Soler A.et al.Nutrient removal and sludge production inthe coagulation-flocculation process, Wat.Res., 2002,36:2910-2919.).(Scientia Agricultura Sinica, 1997,30 (1): 26-32) studies show that FePO such as Guo Zhifen
4Plant phosphorus nutrition in the alkaline soil is had significant contribution, and its validity and aluminum phosphate are suitable, are better than calcium phosphate.
Summary of the invention
The purpose of this invention is to provide a kind of phosphorus-contained wastewater treating method, make it not only can effectively remove phosphorus in the waste water, and can effectively overcome in traditional biologic process for treating sewage, the reduction of pH value, the water that add the excessive treating water that causes owing to molysite are defectives such as yellow, reduce the turbidity of remainder fe concentration and water in the treating water effectively, improve the quality for the treatment of water.
Another object of the present invention provides the application of the phosphorus product that produces in wastewater treatment.
Technical scheme of the present invention is as follows: a kind of phosphorus-contained wastewater treating method is characterized in that this method carries out as follows:
1) add molysite as flocculation agent in pending phosphorus-containing wastewater, making its concentration that is dispersed in the waste water is 10～50mg/L, makes flocculation agent thorough mixing in waste water under the 200rpm stirring at least;
2) add the quaternary ammonium salt Weibull then, making its concentration that is dispersed in the waste water is 2～20mg/L, stirs 2min again under 20～100rpm at least, reclaims phosphorous throw out behind the quiescent setting.
Above-mentioned treatment process roughly experiences two stages.Fs is the formation of particulate, promptly when chemical agent---and after molysite adds pending water, mixing fast down, both interact, and form small particle, are referred to as agglomeration process.Subordinate phase is that the molecule that forms is adding the quaternary ammonium salt Weibull under the agitation condition at a slow speed, flocculation takes place make big formation of particle change be easy to sedimentary phosphorous throw out, is referred to as flocculation.Cohesion and flocculation are generically and collectively referred to as coagulation, and in fact the process of removing of phosphorus also can be regarded a kind of process of coagulation as.
In above-mentioned phosphorus-contained wastewater treating method, the phosphorous throw out of described recovery is as the application of soil slow-release phosphate fertilizer.
Phosphorus-containing wastewater of the present invention is second pond water or the phosphoric acid ion processing water after aerobic-anaerobion is coupled processing repeatedly.
The present invention adopts molysite as flocculation agent, quaternary ammonium salt Weibull (Quaternary ammonium tannate, US6,478,986) be coagulant aids, both synergies not only can effectively be removed the P contained compound (phosphor-removing effect can reach more than 80%) in waste water or the treating water, reduce the eutrophication factor of discharge water, the adding of quaternary ammonium salt Weibull simultaneously can reduce the turbidity and the remaining iron level (compare remainder fe concentration with the situation that does not add the quaternary ammonium salt Weibull and reduce by 40～90%) of water, improves the quality for the treatment of water; And can quicken flocculation rate, shorten flocculation time.The phosphorous throw out that obtains can be used for agricultural and uses slow-release phosphate fertilizer, can effectively increase the releasing effect of phosphorus.Technology of the present invention is simple, in the phosphorus, realizes the recovery of phosphorus in effective removal waste water or treating water, and recycling, can produce good environment, economic and social benefit.
Embodiment
The quaternary ammonium salt Weibull (US 6,478,986) that the present invention adopts, its chemical structural formula is as follows:
The step that water turbidity (NTU) is measured is waste water is poured 500mL at once into after coagulation finishes a volumetric flask, constantly begins to clock the turbidity every regular hour mensuration liquid level 1cm place from zero.
The artificial wastewater (mg/L) composed as follows who uses:
Glucose (TOC) 100-350; (NH
4)
2SO
4(T-N) 10-70; KH
2PO
4(T-P): 1.5-8; MgSO
47H
2O 2.5-15; CaCl
22H
2O 0.6～3; FeCl
24H
2O 0.05～0.3
The interpolation of embodiment 1 quaternary ammonium salt Weibull is to the phosphor-removing effect of different waste water
Aerobic-the anaerobism of getting treating water, Gaobeidian City, Beijing operation of Gaobeidian City, Beijing sewage work preliminary sedimentation tank water, Gaobeidian City, Beijing sewage work second pond respectively be coupled repeatedly water outlet, the laboratory of sewage disposal pilot plant aerobic-anaerobism be coupled repeatedly sewage-treating reactor treating water and phosphoric acid artificial wastewater, add FeCl
3, 600rpm stirs 1min; Add the quaternary ammonium salt Weibull then, making its concentration that is dispersed in the waste water is 10mg/L, and 50rpm stirs 10min again, the results are shown in following table.
| Wastewater source | Quaternary ammonium salt Weibull (mg/L) | Phosphorus concentration (mg/L) | Dephosphorization efficiency by using (%) | ????FeCl 3-Fe(mg/L) | ||
| Before the processing | After the processing | Add concentration | Residual concentration | |||
| Gaobeidian City, Beijing sewage work preliminary sedimentation tank water | ????0 | ??4.07 | ??0.51 | ????87 | ????30 | ????5.5 |
| ????10 | ??4.07 | ??0.29 | ????93 | ????30 | ????3.1 | |
| Gaobeidian City, Beijing sewage work second pond water | ????0 | ??5.05 | ??0.72 | ????86 | ????25 | ????1.8 |
| ????10 | ??5.05 | ??0.51 | ????90 | ????25 | ????0.2 | |
| Be coupled the repeatedly water outlet of sewage disposal pilot plant of the aerobic-anaerobism of Gaobeidian City, Beijing operation | ????0 | ??5.24 | ??0.48 | ????91 | ????30 | ????4.0 |
| ????10 | ??5.24 | ??0.59 | ????89 | ????30 | ????0.7 | |
| The laboratory is aerobic-the anaerobism sewage-treating reactor treating water that is coupled repeatedly | ????0 | ??9.21 | ??2.02 | ????78 | ????25 | ????4.7 |
| ????10 | ??9.21 | ??1.75 | ????81 | ????25 | ????2.9 | |
| Phosphoric acid artificial wastewater | ????0 | ??4.67 | ??0.34 | ????93 | ????30 | ????5.3 |
| ????10 | ??4.67 | ??0.32 | ????93 | ????30 | ????2.1 |
The interpolation of embodiment 2 quaternary ammonium salt Weibull is to artificial phosphoric acid waste water dephosphorization effect
At phosphorus concentration is to add a certain amount of FeCl among the artificial wastewater of 7mg/L
3, FeCl
3The concentration that is dispersed in the waste water is 10mg/L, and 200rpm stirs 2min, and 20rpm stirs 30min again, measures phosphorus concentration, turbidity and the remainder fe concentration for the treatment of water, is respectively 2.5mg/L, 15 and 1.5mg/L.
At phosphorus concentration is to add a certain amount of FeCl among the artificial wastewater of 7mg/L
3, FeCl
3The concentration that is dispersed in the waste water is 10mg/L, and 200rpm stirs 2min, adds the quaternary ammonium salt Weibull then, its concentration that is dispersed in the waste water is 2mg/L, and 20rpm stirs 30min, measures phosphorus concentration, turbidity and the remainder fe concentration for the treatment of water, be respectively 2.5mg/L, 10 and 0.8mg/L.
The interpolation of embodiment 3 quaternary ammonium salt Weibull is to aerobic-anaerobion coupling technique treating water phosphor-removing effect repeatedly
The preparation phosphorus concentration is the artificial wastewater of 10mg/L, through laboratory scale aerobic-anaerobion is after coupling technique is handled repeatedly, add Gao Jutie, Gao Jutie is dispersed in that concentration is 50mg/L in the waste water, 800rpm stirs 3min, and 100rpm stirs 2min again, measures phosphorus concentration, turbidity and the remainder fe concentration for the treatment of water, be respectively 0.5mg/L, 20 and 8mg/L.
The preparation phosphorus concentration is the artificial wastewater of 10mg/L, through laboratory scale aerobic-anaerobion is after coupling technique is handled repeatedly, add Gao Jutie, Gao Jutie is dispersed in that concentration is 50mg/L in the waste water, and 800rpm stirs 3min, add the quaternary ammonium salt Weibull then, its concentration that is dispersed in the waste water is 20mg/L, and 100rpm stirs 2min, measures phosphorus concentration, turbidity and the remainder fe concentration for the treatment of water, be respectively 0.5mg/L, 10 and 0.8mg/L.
Claims (5)
1. phosphorus-contained wastewater treating method is characterized in that this method carries out as follows:
1) add molysite as flocculation agent in pending phosphorus-containing wastewater, making its concentration that is dispersed in the waste water is 10～50mg/L, and 200rpm stirs and makes flocculation agent thorough mixing in waste water at least;
2) add the quaternary ammonium salt Weibull then, making its concentration that is dispersed in the waste water is 2～20mg/L, stirs 2min again under 20～100rpm at least, reclaims phosphorous throw out behind the quiescent setting.
2. according to the described phosphorus-contained wastewater treating method of claim 1, it is characterized in that: described phosphorus-containing wastewater is second pond water or the phosphoric acid ion processing water after aerobic-anaerobion is coupled processing repeatedly.
3. the phosphorous throw out that reclaims according to claim 1 is as the application of soil slow-release phosphate fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009462 CN1246229C (en) | 2004-08-20 | 2004-08-20 | Phosphorus containing waste water treatment method and its application of recovered phosphorus product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009462 CN1246229C (en) | 2004-08-20 | 2004-08-20 | Phosphorus containing waste water treatment method and its application of recovered phosphorus product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1597545A true CN1597545A (en) | 2005-03-23 |
| CN1246229C CN1246229C (en) | 2006-03-22 |
Family
ID=34662499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410009462 Expired - Fee Related CN1246229C (en) | 2004-08-20 | 2004-08-20 | Phosphorus containing waste water treatment method and its application of recovered phosphorus product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1246229C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328183C (en) * | 2006-05-24 | 2007-07-25 | 湖南大学 | Method for recovering nitrogen and phosphorus from sewage |
| CN100393636C (en) * | 2005-11-17 | 2008-06-11 | 湖南大学 | Process for treating waste water of high concentration containing phosphorus |
| CN102229454A (en) * | 2011-04-29 | 2011-11-02 | 诸暨市助剂厂 | Technology for preparing phosphate product with phosphorus-containing wastewater |
| CN103723874A (en) * | 2014-01-22 | 2014-04-16 | 安徽科技学院 | Device and method for recovering phosphorus from sewage |
| CN107512829A (en) * | 2017-09-26 | 2017-12-26 | 大连海事大学 | A kind of device and method of Sewage from Ships denitrogenation dephosphorizing |
| CN108017130A (en) * | 2017-12-12 | 2018-05-11 | 广东省石油与精细化工研究院 | A kind of environment-friendly type aquiculture sewerage composite flocculation agent and its preparation method and application |
| CN108178260A (en) * | 2017-12-12 | 2018-06-19 | 广东省石油与精细化工研究院 | A kind of method of efficient flocculating leather waste water |
| CN108726792A (en) * | 2018-04-28 | 2018-11-02 | 六安荣耀创新智能科技有限公司 | A kind of trade effluent dephosphorization device |
-
2004
- 2004-08-20 CN CN 200410009462 patent/CN1246229C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393636C (en) * | 2005-11-17 | 2008-06-11 | 湖南大学 | Process for treating waste water of high concentration containing phosphorus |
| CN1328183C (en) * | 2006-05-24 | 2007-07-25 | 湖南大学 | Method for recovering nitrogen and phosphorus from sewage |
| CN102229454A (en) * | 2011-04-29 | 2011-11-02 | 诸暨市助剂厂 | Technology for preparing phosphate product with phosphorus-containing wastewater |
| CN103723874A (en) * | 2014-01-22 | 2014-04-16 | 安徽科技学院 | Device and method for recovering phosphorus from sewage |
| CN107512829A (en) * | 2017-09-26 | 2017-12-26 | 大连海事大学 | A kind of device and method of Sewage from Ships denitrogenation dephosphorizing |
| CN108017130A (en) * | 2017-12-12 | 2018-05-11 | 广东省石油与精细化工研究院 | A kind of environment-friendly type aquiculture sewerage composite flocculation agent and its preparation method and application |
| CN108178260A (en) * | 2017-12-12 | 2018-06-19 | 广东省石油与精细化工研究院 | A kind of method of efficient flocculating leather waste water |
| CN108726792A (en) * | 2018-04-28 | 2018-11-02 | 六安荣耀创新智能科技有限公司 | A kind of trade effluent dephosphorization device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1246229C (en) | 2006-03-22 |
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