CN113816481A - Efficient composite phosphorus removal agent for domestic sewage treatment and preparation method thereof - Google Patents
Efficient composite phosphorus removal agent for domestic sewage treatment and preparation method thereof Download PDFInfo
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- CN113816481A CN113816481A CN202111271600.8A CN202111271600A CN113816481A CN 113816481 A CN113816481 A CN 113816481A CN 202111271600 A CN202111271600 A CN 202111271600A CN 113816481 A CN113816481 A CN 113816481A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 49
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000011574 phosphorus Substances 0.000 title claims abstract description 45
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000010865 sewage Substances 0.000 title claims abstract description 30
- 239000000243 solution Substances 0.000 claims abstract description 34
- 239000011259 mixed solution Substances 0.000 claims abstract description 26
- 239000003960 organic solvent Substances 0.000 claims abstract description 14
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 14
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 150000002505 iron Chemical class 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 7
- 239000012498 ultrapure water Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 5
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 5
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims 2
- 229960002089 ferrous chloride Drugs 0.000 claims 1
- 235000003891 ferrous sulphate Nutrition 0.000 claims 1
- 239000011790 ferrous sulphate Substances 0.000 claims 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims 1
- 235000015497 potassium bicarbonate Nutrition 0.000 claims 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims 1
- 239000011736 potassium bicarbonate Substances 0.000 claims 1
- 229910000027 potassium carbonate Inorganic materials 0.000 claims 1
- 235000011181 potassium carbonates Nutrition 0.000 claims 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims 1
- 235000017550 sodium carbonate Nutrition 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035484 reaction time Effects 0.000 abstract description 6
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 abstract description 3
- URRHWTYOQNLUKY-UHFFFAOYSA-N [AlH3].[P] Chemical compound [AlH3].[P] URRHWTYOQNLUKY-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- -1 aluminum ions Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2209/18—PO4-P
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
A high-efficiency composite phosphorus removal agent for domestic sewage treatment and a preparation method thereof comprise the following raw materials, by weight, 40-65 parts of an aluminum salt preparation, 10-50 parts of an iron salt preparation, 1-5 parts of an organic solvent and 1-15 parts of an alkaline agent; the preparation method comprises the following steps: step one, mixing an aluminum salt preparation and ultrapure water in proportion; step two, adding an iron salt preparation into the solution I, and step three, adding an organic solvent into the solution II; step four, when the polymerization reaction is carried out to a half (reaction time), adding an alkaline agent; step five, standing the mixed solution after the reaction of the mixed solution IV is finished to obtain the high-efficiency composite phosphorus removing agent; has the advantages that: the high-efficiency composite phosphorus removing agent has the characteristics of both an aluminum salt phosphorus removing agent and an iron salt phosphorus removing agent, has a good total phosphorus removing effect, and does not cause the problem of factory water color; the raw materials for preparing the high-efficiency composite phosphorus removing agent are easy to obtain.
Description
Technical Field
The invention relates to the technical field of water treatment preparations, in particular to a high-efficiency composite phosphorus removal agent for domestic sewage treatment and a preparation method thereof.
Background
In recent years, with the continuous and deep promotion of ecological civilization construction, the requirement on the quality of the water discharged from a sewage treatment plant is gradually increased. Phosphorus is an important cause of water eutrophication, so the discharge standard of sewage treatment plants is becoming strict day by day, and on the basis of executing the first-class A standard of pollutant discharge Standard of urban Sewage plant (GB18918-2002), local standards are successively established in provinces and cities such as Beijing, Tianjin, Zhejiang and Shenzhen, and higher requirements are put forward on the discharge of pollutants of urban sewage treatment plants.
At present, according to the requirements of documents such as a three-year action scheme for improving quality and increasing efficiency (2019-2021) of a sewage treatment plant in Henan province, town and town, and a high-quality promotion city construction implementation scheme in 2020 of Zheng State, the index of total phosphorus in effluent of the sewage treatment plant needs to reach the quality standard of surface water III (less than or equal to 0.2mg/L), and aluminum salt medicaments such as polyaluminium chloride and the like for removing the total phosphorus at present have the advantages of low price, no color and the like, but are difficult to reach the quality standard requirement of the surface water III; ferric salt coagulants such as polyferric sulfate and the like have good total phosphorus removal effect, but the sensory requirements of effluent are seriously influenced by the increase of the chromaticity index. Therefore, in order to reduce the construction cost and the operation cost of sewage treatment as much as possible and ensure that the effluent of the sewage treatment plant stably reaches the standard, a new solution is required to be found.
Aiming at the practical requirement of total phosphorus removal in the upgrading and transformation process of a sewage treatment plant, the efficient composite phosphorus removal agent is prepared by simple raw materials and a method and is used in domestic sewage treatment production.
The high-efficiency composite phosphorus removing agent has the performances of aluminum salt and iron salt phosphorus removing agents, and has the characteristics of economy, high efficiency, reliable operation (no other negative effects on process operation while removing total phosphorus), and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a high-efficiency composite phosphorus removal agent for domestic sewage treatment and a preparation method thereof.
The invention is realized by the following technical scheme:
the efficient composite phosphorus removal agent for domestic sewage treatment comprises, by weight, 40-65 parts of an aluminum salt preparation, 10-50 parts of an iron salt preparation, 1-5 parts of an organic solvent and 1-15 parts of sodium bicarbonate.
The functions and characteristics of the raw materials of each component are as follows:
aluminium salt formulations
The function is as follows: aluminum ions generated after hydrolysis can generate precipitates with phosphate, and then the precipitates are removed; and the aluminum salt coagulant has better turbidity removal performance and small corrosion effect on equipment.
Iron salt formulations
The function is as follows: iron ions generated after hydrolysis can generate precipitates with phosphate, and then the precipitates are removed; and the ferric salt coagulant has the advantages of high settling speed, wide pH application range and the like.
Organic solvent
The function is as follows: as a stabilizer, the coagulation of the polymer can be slowed down.
Alkaline agent
The function is as follows: the alkalization degree of the polymer is improved, and the coagulation effect is promoted.
A preparation method of the efficient composite phosphorus removal agent for domestic sewage treatment comprises the following steps:
step one, mixing an aluminum salt preparation and ultrapure water in a ratio of 1:10 to obtain a solution I;
step two, adding an iron salt preparation into the solution I to obtain a mixed solution II;
adding an organic solvent into the solution II to obtain a mixed solution III;
and step four, when the polymerization reaction is carried out to a half (reaction time), adding an alkaline agent, and adjusting the alkalization degree to 0.4-0.8 to obtain a mixed solution IV.
And step five, standing the mixed solution after the four polymerization reactions are finished to obtain the high-efficiency composite phosphorus removing agent.
Preferably, in the third step, the solution II and the organic solvent are mixed at the temperature of 70-90 ℃, and are continuously stirred and polymerized for 1-2 hours.
Preferably, in the fifth step, the fourth solution is kept still for 24-48 hours.
The invention has the beneficial effects that:
(1) the high-efficiency composite phosphorus removing agent has the characteristics of both an aluminum salt phosphorus removing agent and an iron salt phosphorus removing agent, has a good total phosphorus removing effect, and does not cause the problem of factory water color.
(2) The raw materials for preparing the high-efficiency composite phosphorus removing agent are easy to obtain.
(3) In the using process of a sewage treatment plant, the comprehensive cost of adding the high-efficiency composite phosphorus removing agent into each ton of water is only about 0.05 yuan, a better treatment effect can be obtained, and the ultimate removal of total phosphorus can be realized.
(4) After the high-efficiency composite phosphorus removing agent is added, the process is stable in operation, and the negative influence on the original process can not be caused.
Detailed Description
In the description of the present invention, it is also to be noted that, unless explicitly stated or limited otherwise; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The efficient composite phosphorus removal agent for domestic sewage treatment comprises, by weight, 40-65 parts of an aluminum salt preparation, 10-50 parts of an iron salt preparation, 1-5 parts of an organic solvent and 1-15 parts of an alkaline agent.
A preparation method of the efficient composite phosphorus removal agent for domestic sewage treatment comprises the following steps:
step one, mixing an aluminum salt preparation and ultrapure water in a ratio of 1:10 to obtain a solution I;
step two, adding an iron salt preparation into the solution I to obtain a mixed solution II;
adding an organic solvent into the solution II to obtain a mixed solution III;
and step four, when the polymerization reaction is carried out to a half (reaction time), adding an alkaline agent, and adjusting the alkalization degree to 0.4-0.8 to obtain a mixed solution IV.
And step five, standing the mixed solution after the four polymerization reactions are finished to obtain the high-efficiency composite phosphorus removing agent.
And in the third step, mixing the solution II with an organic solvent at the temperature of 70-90 ℃, and continuously stirring for polymerization for 1-2 h.
And in the fifth step, standing the solution IV for 24-48 h.
Example 1
Step one, mixing 45 parts of aluminum sulfate and ultrapure water in a ratio (weight ratio) of 1:10 to obtain a solution I;
step two, adding 45 parts of ferric sulfate into the solution I to obtain a mixed solution II;
adding 5 parts of methanol into the solution II to obtain a mixed solution III;
and step four, when the polymerization reaction is carried out to a half (reaction time), adding 5 parts of sodium bicarbonate, and adjusting the alkalization degree to 0.4-0.8 to obtain a mixed solution four.
And step five, standing the mixed solution after the four polymerization reactions are finished to obtain the high-efficiency composite phosphorus removing agent.
And in the third step, the solution II and methanol are mixed at the temperature of 70-90 ℃, and the mixture is continuously stirred and polymerized for 1-2 hours.
And in the fifth step, standing the solution IV for 24-48 h.
Example 2
Step one, mixing 50 parts of aluminum chloride and ultrapure water in a ratio (weight ratio) of 1:10 to obtain a solution I;
step two, adding 35 parts of ferric chloride into the solution I to obtain a mixed solution II;
adding 5 parts of methanol into the solution II to obtain a mixed solution III;
and step four, when the polymerization reaction is carried out to half (reaction time), adding 10 parts of sodium bicarbonate, and adjusting the alkalization degree to 0.4-0.8 to obtain a mixed solution IV.
And step five, standing the mixed solution after the four polymerization reactions are finished to obtain the high-efficiency composite phosphorus removing agent.
And in the third step, the solution II and methanol are mixed at the temperature of 70-90 ℃, and the mixture is continuously stirred and polymerized for 1-2 hours.
And in the fifth step, standing the solution IV for 24-48 h.
Example 3
Step one, mixing 55 parts of aluminum sulfate and ultrapure water in a ratio (weight ratio) of 1:10 to obtain a solution I;
adding 25 parts of ferric sulfate into the first solution to obtain a second mixed solution;
adding 5 parts of ethanol into the solution II to obtain a mixed solution III;
and step four, when the polymerization reaction is carried out to a half (reaction time), adding 15 parts of sodium carbonate, and adjusting the alkalization degree to 0.4-0.8 to obtain a mixed solution IV.
And step five, standing the mixed solution after the four polymerization reactions are finished to obtain the high-efficiency composite phosphorus removing agent.
And in the third step, mixing the solution II with ethanol at the temperature of 70-90 ℃, and continuously stirring and polymerizing for 1-2 hours.
And in the fifth step, standing the solution IV for 24-48 h.
The effluent of the secondary sedimentation tank of the sewage treatment plant is taken, and the phosphorus removal efficiency of the medicaments of 3 embodiments is tested under the condition that the total phosphorus concentration is 1.3mg/L and is compared with aluminum sulfate and ferric sulfate. The dosage of the medicament is 60mg/L, 70mg/L, 80mg/L, 90mg/L and 100mg/L, and blank control is set. The experimental water amount is 1L, and the coagulating sedimentation conditions are as follows: stirring at 250r/min for 1min, stirring at 50r/min for 12min, precipitating for 30min, adding the above materials before stirring, and measuring the total phosphorus concentration in the supernatant after precipitation, wherein the measured data are shown in Table 1.
TABLE 1 Total phosphorus concentration Change (mg/L) under different addition concentration conditions
The corresponding chromaticity variation data are shown in table 2.
TABLE 2 color change (degree) under different adding concentration conditions
The data analysis shows that the effect of removing phosphorus by using aluminum sulfate alone is difficult to meet the requirement of the water quality standard (less than or equal to 0.2mg/L) of surface water III, and although ferric sulfate can meet the standard requirement, the chromaticity can be greatly increased to influence the effluent sensory index; the high-efficiency composite phosphorus removing agent can meet the phosphorus removing requirement, does not increase the water chromaticity, and can meet the actual production requirement.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. The efficient composite phosphorus removal agent for domestic sewage treatment is characterized by comprising the following raw materials, by weight, 40-65 parts of an aluminum salt preparation, 10-50 parts of an iron salt preparation, 1-5 parts of an organic solvent and 1-15 parts of an alkaline agent.
2. The efficient composite dephosphorizing agent for domestic sewage treatment according to claim 1, which comprises 55 parts of aluminum salt preparation, 20 parts of iron salt preparation, 3 parts of organic solvent and 2 parts of alkaline agent.
3. The efficient composite dephosphorizing agent for domestic sewage treatment according to claim 1, wherein said aluminum salt preparation comprises one or more of aluminum sulfate, aluminum chloride and the like.
4. The efficient composite dephosphorizing agent for domestic sewage treatment according to claim 1, wherein said iron salt preparation comprises one or more of ferric sulfate, ferric chloride, ferrous sulfate, ferrous chloride, etc.
5. The efficient composite phosphorus removal agent for domestic sewage treatment according to claim 1, wherein the organic solvent comprises one or more of methanol, ethanol, propanol, butanol, etc.
6. The efficient composite dephosphorizing agent for domestic sewage treatment according to claim 1, wherein said alkaline agent comprises one or more of sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, etc.
7. A preparation method of a high-efficiency composite phosphorus removal agent for domestic sewage treatment is characterized by comprising the following steps,
step one, mixing an aluminum salt preparation and ultrapure water in a ratio of 1:10 to obtain a solution I;
step two, adding an iron salt preparation into the solution I to obtain a mixed solution II;
adding an organic solvent into the solution II to obtain a mixed solution III;
step four, when the polymerization reaction is carried out to a half, adding an alkaline agent, and adjusting the alkalization degree to 0.4-0.8 to obtain a mixed solution four;
and step five, standing the mixed solution after the four polymerization reactions are finished to obtain the high-efficiency composite phosphorus removing agent.
8. The preparation method of the efficient composite phosphorus removal agent for domestic sewage treatment of claim 7, wherein in the third step, the second solution is mixed with the organic solvent at 70-90 ℃, and the mixture is continuously stirred and polymerized for 1-2 hours.
9. The preparation method of the efficient composite phosphorus removal agent for domestic sewage treatment of claim 1, according to claim 7, wherein in the fifth step, the fourth solution is allowed to stand for 24-48 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111271600.8A CN113816481A (en) | 2021-10-29 | 2021-10-29 | Efficient composite phosphorus removal agent for domestic sewage treatment and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111271600.8A CN113816481A (en) | 2021-10-29 | 2021-10-29 | Efficient composite phosphorus removal agent for domestic sewage treatment and preparation method thereof |
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| CN113816481A true CN113816481A (en) | 2021-12-21 |
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| CN202111271600.8A Pending CN113816481A (en) | 2021-10-29 | 2021-10-29 | Efficient composite phosphorus removal agent for domestic sewage treatment and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008068248A (en) * | 2006-08-17 | 2008-03-27 | Hitachi Housetec Co Ltd | Solid phosphorus removing agent, method for producing the same, method for dissolving the same in water, apparatus for dissolving the same and waste water cleaning tank equipped with the apparatus |
| CN110980905A (en) * | 2019-12-23 | 2020-04-10 | 广东慧信环保有限公司 | Preparation method of polymeric aluminum ferric sulfate solution with high stability |
| CN111302409A (en) * | 2018-12-12 | 2020-06-19 | 内蒙古信尚环保科技有限公司 | Sewage phosphorus removal agent, preparation method and application thereof |
| CN112158933A (en) * | 2020-10-19 | 2021-01-01 | 西安工程大学 | Polyaluminum ferric chloride flocculant and preparation method thereof |
| CN113104900A (en) * | 2021-03-11 | 2021-07-13 | 中环保水务投资有限公司 | Composite polyaluminum ferric chloride flocculating dephosphorization agent and preparation method thereof |
-
2021
- 2021-10-29 CN CN202111271600.8A patent/CN113816481A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008068248A (en) * | 2006-08-17 | 2008-03-27 | Hitachi Housetec Co Ltd | Solid phosphorus removing agent, method for producing the same, method for dissolving the same in water, apparatus for dissolving the same and waste water cleaning tank equipped with the apparatus |
| CN111302409A (en) * | 2018-12-12 | 2020-06-19 | 内蒙古信尚环保科技有限公司 | Sewage phosphorus removal agent, preparation method and application thereof |
| CN110980905A (en) * | 2019-12-23 | 2020-04-10 | 广东慧信环保有限公司 | Preparation method of polymeric aluminum ferric sulfate solution with high stability |
| CN112158933A (en) * | 2020-10-19 | 2021-01-01 | 西安工程大学 | Polyaluminum ferric chloride flocculant and preparation method thereof |
| CN113104900A (en) * | 2021-03-11 | 2021-07-13 | 中环保水务投资有限公司 | Composite polyaluminum ferric chloride flocculating dephosphorization agent and preparation method thereof |
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