CN112551729A - Treatment method for removing ammonia nitrogen from kitchen wastewater - Google Patents
Treatment method for removing ammonia nitrogen from kitchen wastewater Download PDFInfo
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- CN112551729A CN112551729A CN202011095866.7A CN202011095866A CN112551729A CN 112551729 A CN112551729 A CN 112551729A CN 202011095866 A CN202011095866 A CN 202011095866A CN 112551729 A CN112551729 A CN 112551729A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 35
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 34
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 19
- 229910052567 struvite Inorganic materials 0.000 claims abstract description 16
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 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 13
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 12
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000013049 sediment Substances 0.000 claims abstract description 8
- 239000004137 magnesium phosphate Substances 0.000 claims abstract description 7
- 229960002261 magnesium phosphate Drugs 0.000 claims abstract description 7
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims abstract description 7
- 235000010994 magnesium phosphates Nutrition 0.000 claims abstract description 7
- 239000006228 supernatant Substances 0.000 claims abstract description 6
- 239000003814 drug Substances 0.000 claims abstract description 5
- 238000001556 precipitation Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 229910019142 PO4 Inorganic materials 0.000 claims description 10
- 239000010452 phosphate Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000010806 kitchen waste Substances 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 7
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 5
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 4
- 159000000003 magnesium salts Chemical class 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 2
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- 235000011008 sodium phosphates Nutrition 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 238000004090 dissolution Methods 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- MXZRMHIULZDAKC-UHFFFAOYSA-L ammonium magnesium phosphate Chemical compound [NH4+].[Mg+2].[O-]P([O-])([O-])=O MXZRMHIULZDAKC-UHFFFAOYSA-L 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 229940079593 drug Drugs 0.000 abstract 3
- 239000013078 crystal Substances 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 3
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013048 microbiological method Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- 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 treatment method of ammonia nitrogen in kitchen wastewater, which comprises the steps of enabling the kitchen wastewater to enter a first reactor, adding phosphoric acid to remove carbonate in the wastewater, then enabling the kitchen wastewater to enter a second reactor, adding magnesium oxide, stirring for dissolving, enabling the kitchen wastewater to enter a third reactor, adding magnesium chloride and phosphate to form a crystal nucleus, generating struvite sediment, enabling the struvite sediment to enter a sediment device, enabling the sediment to stand, and discharging supernatant effluent after reaching the standard. The method applies the magnesium ammonium phosphate method to the ammonia nitrogen treatment of the kitchen wastewater by adjusting the types of the added medicines and the adding sequence of the medicines, reduces the use of the medicines, reduces the cost and improves the treatment effect of the ammonia nitrogen.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a treatment method for removing ammonia nitrogen from kitchen wastewater.
Background
With the development of social economy and the improvement of living conditions of people, the types of food on dining tables are more and more abundant, and the amount of kitchen waste generated after dining is increased day by day. The kitchen waste has high water content and low heat value, is rarely properly treated and utilized aiming at the kitchen waste in China at present, and has the main approach of landfill treatment through a landfill plant, so that resources are wasted, the inventory of the landfill is occupied, a large amount of percolate is generated, and secondary pollution of the landfill is caused. Therefore, the separate treatment of the kitchen waste is urgent.
The main component of the kitchen waste is food residue, and the chemical components mainly comprise starch, protein, cellulose, fat and inorganic salts. Therefore, the components in the kitchen wastewater are very complex, and the kitchen wastewater has high salinity, high COD (chemical oxygen demand) and high ammonia nitrogen.
The existing wastewater deamination technology comprises the following steps: the stripping method, the breakpoint chlorination method, the microbiological method, the chemical precipitation method, the ion exchange method and the membrane method, and all the methods have the advantages and disadvantages and different applicable conditions. The blowing method needs to add a large amount of alkali and needs a certain heat source; the breakpoint chlorination method has high treatment efficiency, but only aims at the treatment of low-concentration ammonia nitrogen wastewater, the microbiological method has low cost, but occupies large area, needs a large amount of debugging and domesticating microorganisms, and is highly limited by water quality and water quantity. Aiming at the ammonia nitrogen content of the kitchen wastewater, an ammonium magnesium phosphate method is preferably selected for treatment.
The technical method for treating the kitchen wastewater by the magnesium ammonium phosphate method in the prior art does not consider the influence of carbonate during the reaction of magnesium oxide, phosphate and ammonia nitrogen, a large amount of carbonate in water preferentially reacts with added magnesium salt to generate insoluble magnesium carbonate precipitate, a large amount of magnesium ions are consumed, and the treatment cost is increased. Meanwhile, the selection, the adding proportion and the adding sequence of the magnesium salt are optimized, so that the cost is reduced, and the ammonia nitrogen removal efficiency is improved.
For example, Chinese patent CN201710667330.X discloses a method and a system for treating high ammonia nitrogen wastewater. The influence of carbonate in water is not considered, so that the treatment cost is greatly increased, and meanwhile, the method is implemented under the condition of supergravity centrifugation, so that the treatment cost is high, and the severe treatment condition also means high failure rate, and is not beneficial to the normalized treatment of high ammonia nitrogen wastewater.
The treatment method has the advantages that the treatment method is low in cost and high in yield, and the dosing steps and the dosing amount are reasonably designed, so that a large amount of magnesium ions provided by magnesium chloride and phosphate ions provided by phosphate react with ammonia nitrogen in the wastewater under the condition of proper PH to generate struvite sediment.
Disclosure of Invention
The invention aims to solve the problem that an innovative scheme is provided aiming at the defects in the prior art, and particularly relates to a scheme capable of effectively improving the ammonia nitrogen removal rate of kitchen wastewater.
In order to solve the problems, the invention adopts the following scheme: the treatment method of ammonia nitrogen in kitchen wastewater is based on a first reactor, a second reactor, a third reactor and a precipitation device which are sequentially connected, and ammonia nitrogen in the wastewater is removed by adding a medicament to generate struvite precipitate, and is characterized by comprising the following steps of:
s1: kitchen waste water enters into a first reactor, adds a small amount of phosphoric acid, adjusts PH, gets rid of the carbonate ion in the waste water, and its chemical reaction formula is: 3Na2CO3+2H3PO4= =2Na3PO4+3H2O +3CO2 ═ 2;
s2: the wastewater obtained in the step S1 enters a second reactor, magnesium oxide is added, stirring and dissolving are carried out, and the PH value of the wastewater is adjusted;
s3: the wastewater obtained in the step S2 enters a third reactor, magnesium chloride and phosphate are added, struvite sediment is generated through reaction, and ammonia nitrogen in the wastewater is removed;
s4: and (5) the wastewater obtained in the step (S3) enters a precipitation device again, standing and precipitating are carried out, and the supernatant reaches the standard and is discharged.
Further, according to the above design scheme, the method for treating ammonia nitrogen in kitchen wastewater is characterized in that in step S1, phosphoric acid is added into wastewater by the first reactor under the stirring condition of the rotation speed of 220r/min to adjust the pH value to 7, a large amount of carbonate existing in the wastewater is removed, and carbonate in the wastewater and magnesium salt added subsequently are prevented from reacting to generate magnesium carbonate precipitate.
Further, according to the above design scheme, the treatment method for removing ammonia nitrogen from kitchen wastewater is characterized by comprising the following steps: in step S2, the second reactor adds magnesium oxide into the wastewater under the stirring condition of the rotating speed of 220r/min, the magnesium oxide is dissolved for 30 minutes, and the dissolved solution has a pH value of 9.5 and is in a favorable generating environment of magnesium ammonium phosphate.
Further, according to the above design scheme, the treatment method for removing ammonia nitrogen from kitchen wastewater is characterized by comprising the following steps: in step S3, adding magnesium chloride and phosphate into the wastewater by the third reactor under the stirring condition of the rotating speed of 220 r/min; the phosphate is any one of sodium phosphate, disodium hydrogen phosphate and sodium dihydrogen phosphate or a mixture of any two or three of the three substances, and the reaction is carried out for 60 minutes.
Further, according to the above design scheme, the treatment method for removing ammonia nitrogen from kitchen wastewater is characterized by comprising the following steps: the addition amount of the magnesium chloride and the phosphate is n (N), n (P), n (Mg) and 1:1:2, n (MgCl 2): n (MgO) =1:2, in this case, a large amount of magnesium ions provided by magnesium chloride and phosphate ions provided by phosphate react with ammonia nitrogen in the wastewater under the appropriate PH condition to generate struvite precipitate, and the chemical reaction formula is as follows: mg2+ + PO 34- + NH4+ + 6H2O → MgNH4PO 4.6H 2O ↓.
Further, according to the above design scheme, the treatment method for removing ammonia nitrogen from kitchen wastewater is characterized by comprising the following steps: and step S4, the kitchen wastewater enters a precipitation device, and after the kitchen wastewater is precipitated and kept stand for 30 minutes, the supernatant reaches the standard and is discharged.
The invention has the following technical effects: by arranging three reactors (a first reactor, a second reactor, a third reactor) and a precipitation device in series. And adding phosphoric acid into the first reactor, wherein the purpose of adding the phosphoric acid is to remove carbonate in the wastewater, and simultaneously, the phosphoric acid can introduce phosphate radicals to prepare for the subsequent generation of struvite. The preparation is saved, and the influence of carbonate on the subsequent magnesium oxide addition is also discharged. The pH value suitable for the struvite generation is alkaline, the adding amount of phosphoric acid is not too much, and the pH value of the wastewater is controlled to be close to 7.
The treatment method has the advantages that the treatment method is low in cost and high in yield, and the dosing steps and the dosing amount are reasonably designed, so that a large amount of magnesium ions provided by magnesium chloride and phosphate ions provided by phosphate react with ammonia nitrogen in the wastewater under the condition of proper PH to generate struvite sediment.
Drawings
FIG. 1 is a reaction flow diagram of a water treatment apparatus according to the present invention.
FIG. 2 is a schematic structural diagram of a processing apparatus according to the present invention.
Wherein, 1 is a first reactor, 2 is a second reactor, 3 is a third reactor, and 4 is a precipitation device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): the utility model provides a get rid of processing apparatus of meal kitchen waste water, includes three reactor first reactor 1, second reactor 2, third reactor 3 and precipitation unit 4.
The reactors (the first reactor 1, the second reactor 2, and the third reactor 3) and the precipitation device 4 in the above examples were connected in series.
And controlling the residence time of the kitchen wastewater in the first reactor 1 to be 30min, and adding phosphoric acid into the wastewater to adjust the pH value to 7 under the condition of the rotating speed of 220r/min, so as to remove a large amount of carbonate existing in the wastewater. The phosphoric acid is added to remove carbonate in the wastewater, and meanwhile, the phosphoric acid can introduce phosphate radicals to prepare for the subsequent struvite generation.
The residence time of the kitchen wastewater in the second reactor 2 is controlled to be 30min, and magnesium oxide is added into the wastewater under the condition of the rotating speed of 220 r/min. The magnesium oxide is insoluble solid powder and is gradually dissolved in the reactor after being added, so that the pH value is increased, and the pH value of the waste water is preferably increased from 7 to 9.5 in 30 minutes.
The kitchen wastewater in the third reactor 3 is controlled to stay for 60min, and magnesium chloride and phosphate are added into the wastewater under the condition of the rotating speed of 220r/min for reaction for 60 min. The preferable molar ratio of the added agents is n (MgCl 2): n (MgO) =1:2, n (N): n (P): n (Mg) =1:1: 2.
And (4) controlling the residence time of the kitchen wastewater in the precipitation device 4 to be 30min, standing for precipitation, and discharging the supernatant which meets the standard.
While embodiments of the present invention have been illustrated and described above, the above embodiments are exemplary and are not to be construed as limiting the present invention. Therefore, it is within the scope of the present invention to modify and improve the processing manner within the scope of the present invention by those skilled in the art without departing from the principle of the present invention.
Claims (6)
1. The treatment method of ammonia nitrogen in kitchen wastewater is based on a first reactor, a second reactor, a third reactor and a precipitation device which are sequentially connected, and ammonia nitrogen in the wastewater is removed by adding a medicament to generate struvite precipitate, and is characterized by comprising the following steps of:
s1: kitchen waste water enters into a first reactor, adds a small amount of phosphoric acid, adjusts PH, gets rid of the carbonate ion in the waste water, and its chemical reaction formula is: 3Na2CO3+2H3PO4= =2Na3PO4+3H2O +3CO2 ═ 2;
s2: the wastewater obtained in the step S1 enters a second reactor, magnesium oxide is added, stirring and dissolving are carried out, and the PH value of the wastewater is adjusted;
s3: the wastewater obtained in the step S2 enters a third reactor, magnesium chloride and phosphate are added, struvite sediment is generated through reaction, and ammonia nitrogen in the wastewater is removed;
s4: and (5) the wastewater obtained in the step (S3) enters a precipitation device again, standing and precipitating are carried out, and the supernatant reaches the standard and is discharged.
2. The ammonia nitrogen treatment method for kitchen wastewater according to claim 1, wherein in step S1, the first reactor adds phosphoric acid to the wastewater under the stirring condition of the rotation speed of 220r/min to adjust the pH value to 7, so as to remove a large amount of carbonate existing in the wastewater and prevent the carbonate in the wastewater from reacting with the subsequently added magnesium salt to generate magnesium carbonate precipitate.
3. The ammonia nitrogen removal treatment method for kitchen wastewater according to claim 1, characterized by comprising the following steps: in step S2, the second reactor adds magnesium oxide into the wastewater under the stirring condition of the rotating speed of 220r/min, and the magnesium oxide is dissolved for 30 minutes, and the pH value of the solution after dissolution is 9.5.
4. The ammonia nitrogen removal treatment method for kitchen wastewater according to claim 1, characterized by comprising the following steps: in step S3, adding magnesium chloride and phosphate into the wastewater by the third reactor under the stirring condition of the rotating speed of 220 r/min; the phosphate is any one of sodium phosphate, disodium hydrogen phosphate and sodium dihydrogen phosphate or a mixture of any two or three of the three substances, and the reaction is carried out for 60 minutes.
5. The ammonia nitrogen removal treatment method for kitchen wastewater according to claim 1, characterized by comprising the following steps: the addition amount of the magnesium chloride and the phosphate is n (N), n (P), n (Mg) and 1:1:2, n (MgCl 2): n (MgO) =1:2, in this case, a large amount of magnesium ions provided by magnesium chloride and phosphate ions provided by phosphate react with ammonia nitrogen in the wastewater under the appropriate PH condition to generate struvite precipitate, and the chemical reaction formula is as follows: mg (magnesium)2++ PO3 4－+ NH4+ + 6H2O→MgNH4PO4·6H2O↓。
6. The ammonia nitrogen removal treatment method for kitchen wastewater according to claim 1, characterized by comprising the following steps: and step S4, the kitchen wastewater enters a precipitation device, and after the kitchen wastewater is precipitated and kept stand for 30 minutes, the supernatant reaches the standard and is discharged.
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| CN202011095866.7A CN112551729A (en) | 2021-01-06 | 2021-01-06 | Treatment method for removing ammonia nitrogen from kitchen wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011095866.7A CN112551729A (en) | 2021-01-06 | 2021-01-06 | Treatment method for removing ammonia nitrogen from kitchen wastewater |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167434A (en) * | 2011-02-15 | 2011-08-31 | 常州大学 | Method for recovering nitrogen and phosphorous from urine |
| CN102964003A (en) * | 2012-11-22 | 2013-03-13 | 中节能六合天融环保科技有限公司 | Method for treating ammonia nitrogen in wastewater by using integrated process |
| CN103848540A (en) * | 2014-01-10 | 2014-06-11 | 洛阳智方环保技术有限公司 | Technique for processing ammonia-nitrogen wastewater employing struvite formation |
-
2021
- 2021-01-06 CN CN202011095866.7A patent/CN112551729A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167434A (en) * | 2011-02-15 | 2011-08-31 | 常州大学 | Method for recovering nitrogen and phosphorous from urine |
| CN102964003A (en) * | 2012-11-22 | 2013-03-13 | 中节能六合天融环保科技有限公司 | Method for treating ammonia nitrogen in wastewater by using integrated process |
| CN103848540A (en) * | 2014-01-10 | 2014-06-11 | 洛阳智方环保技术有限公司 | Technique for processing ammonia-nitrogen wastewater employing struvite formation |
Non-Patent Citations (3)
| Title |
|---|
| 化学工业出版社: "《化工百科全书 第3卷》", 31 March 1993 * |
| 郭春晖: "畜禽粪便磷回收技术的研究概述", 《中国畜禽种业》 * |
| 陈静霞等: "鸟粪石沉淀法预处理高氨氮废水的镁盐研究", 《环境工程学报》 * |
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