CN116715336A - Composite dephosphorizing agent for removing phosphide in wastewater and application method thereof - Google Patents
Composite dephosphorizing agent for removing phosphide in wastewater and application method thereof Download PDFInfo
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- CN116715336A CN116715336A CN202310604439.4A CN202310604439A CN116715336A CN 116715336 A CN116715336 A CN 116715336A CN 202310604439 A CN202310604439 A CN 202310604439A CN 116715336 A CN116715336 A CN 116715336A
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- salt
- dephosphorizing agent
- composite dephosphorizing
- phosphide
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- 239000002131 composite material Substances 0.000 title claims abstract description 121
- 239000002351 wastewater Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 130
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 65
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 150000003839 salts Chemical class 0.000 claims abstract description 28
- 125000000129 anionic group Chemical group 0.000 claims abstract description 22
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 125000002091 cationic group Chemical group 0.000 claims abstract description 15
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 9
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 9
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920001661 Chitosan Polymers 0.000 claims abstract description 7
- 229920000881 Modified starch Polymers 0.000 claims abstract description 7
- 239000004368 Modified starch Substances 0.000 claims abstract description 7
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 7
- 235000019426 modified starch Nutrition 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 114
- 239000003814 drug Substances 0.000 claims description 76
- 238000003756 stirring Methods 0.000 claims description 47
- 239000000243 solution Substances 0.000 claims description 32
- 239000011259 mixed solution Substances 0.000 claims description 31
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 28
- 239000008367 deionised water Substances 0.000 claims description 25
- 229910021641 deionized water Inorganic materials 0.000 claims description 25
- 150000000703 Cerium Chemical class 0.000 claims description 20
- 150000002603 lanthanum Chemical class 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 12
- 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 10
- 150000003608 titanium Chemical class 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 6
- 150000001206 Neodymium Chemical class 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 6
- 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 6
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 6
- 150000003681 vanadium Chemical class 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 4
- 150000003746 yttrium Chemical class 0.000 claims description 4
- 150000003754 zirconium Chemical class 0.000 claims description 4
- 229940037003 alum Drugs 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- QXDMQSPYEZFLGF-UHFFFAOYSA-L calcium oxalate Chemical compound [Ca+2].[O-]C(=O)C([O-])=O QXDMQSPYEZFLGF-UHFFFAOYSA-L 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000010802 sludge Substances 0.000 abstract description 12
- 229910052684 Cerium Inorganic materials 0.000 abstract 1
- 229910052779 Neodymium Inorganic materials 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052746 lanthanum Inorganic materials 0.000 abstract 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052727 yttrium Inorganic materials 0.000 abstract 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
- 101150092780 GSP1 gene Proteins 0.000 description 19
- 230000000694 effects Effects 0.000 description 12
- 238000004065 wastewater treatment Methods 0.000 description 10
- 238000001556 precipitation Methods 0.000 description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 8
- 239000011574 phosphorus Substances 0.000 description 8
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000000693 micelle Substances 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000012629 purifying agent Substances 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 3
- 238000006115 defluorination reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
-
- 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
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine 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
- C02F2101/105—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
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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
The application provides a composite dephosphorizing agent for removing phosphide in wastewater and an application method thereof. The composite dephosphorizing agent is formed by compositing an organic high molecular polymer, rare metal salt and inorganic salt. Wherein, the organic high molecular polymer can be one or more of cationic polyacrylamide, anionic polyacrylamide, sodium polyacrylate, chitosan and modified starch; the inorganic salt can be one or more of aluminum salt, calcium salt and ferric salt; the rare metal salt can be one or more of yttrium, lanthanum, cerium, neodymium, titanium, zirconium and vanadium. According to different specific formulas, the composite dephosphorizing agent with different proportions can be obtained. The composite dephosphorizing agent can efficiently remove phosphide in wastewater, and has the advantages of small dosage, rapid reaction, high removal rate, low sludge yield and the like. The application also provides a use method of the composite dephosphorizing agent.
Description
Technical Field
The application relates to the field of wastewater treatment, in particular to a composite dephosphorizing agent for removing phosphide in wastewater and an application method thereof.
Background
At present, phosphide pollution has become one of serious environmental problems in water, phosphide is a common pollutant in wastewater, and the problems of water eutrophication, algae burst, water quality deterioration and the like are caused. The traditional phosphide removing method comprises chemical precipitation, biological treatment, adsorption and the like, but has the problems of low treatment efficiency, large addition amount, large sludge production and the like. Aiming at the defects of complex process, high cost, low treatment efficiency, large addition amount and the like of the traditional dephosphorization method, a novel dephosphorization agent needs to be developed to improve the dephosphorization effect and reduce the treatment cost.
Disclosure of Invention
In order to solve the problems, the application aims to provide a composite dephosphorizing agent for removing phosphide in wastewater and an application method thereof, wherein the composite dephosphorizing agent can efficiently remove phosphide in wastewater and has good dephosphorizing and defluorination effects and environmental friendliness. The preparation method is simple and feasible, and is suitable for the field of wastewater treatment.
In order to achieve the above purpose, the present application provides the following technical solutions:
the composite dephosphorizing agent for removing phosphide in the wastewater is formed by compositing an organic high molecular polymer, rare metal salt and inorganic salt, and comprises the following components in percentage by mass: 5% -10% of organic high molecular polymer, 27% -32% of rare metal salt and 62% -70% of inorganic salt compound; the composite dephosphorizing agent has the capability of efficiently removing phosphide, and simultaneously has good stability and regeneration performance. Wherein the organic high molecular polymer comprises one or more of cationic polyacrylamide, anionic polyacrylamide, sodium polyacrylate, chitosan and modified starch; the inorganic salt comprises one or more of aluminum salt, calcium salt and ferric salt.
As a further aspect of the present application, the aluminum salt includes one or more of aluminum sulfate, aluminum chloride, aluminum silicate and alum; the calcium salt comprises one or more of calcium chloride, calcium sulfate, calcium carbonate, calcium hydroxide and calcium oxalate; the ferric salt comprises one or more of ferric chloride, ferric sulfate and ferric nitrate.
As a further scheme of the application, the rare metal salt is one or more of yttrium salt, lanthanum salt, cerium salt, neodymium salt, titanium salt, zirconium salt and vanadium salt.
As a further scheme of the application, the cationic polyacrylamide accounts for 10 percent, the lanthanum salt accounts for 12 percent, the cerium salt accounts for 15 percent and the aluminum chloride accounts for 63 percent of the total mass of the composite dephosphorizing agent.
As a further scheme of the application, the content of sodium polyacrylate is 8%, the content of lanthanum salt is 20%, the content of cerium salt is 10%, the content of ferric chloride is 42% and the content of aluminum chloride is 20% based on the total mass percent of the composite dephosphorizing agent.
As a further scheme of the application, the cationic polyacrylamide accounts for 5% of the total mass of the composite dephosphorizing agent, the titanium salt accounts for 8%, the cerium salt accounts for 25%, the calcium chloride accounts for 30% and the aluminum chloride accounts for 32%.
As a further scheme of the application, the total mass percent of the composite dephosphorizing agent is 5 percent of anionic polyacrylamide, 13 percent of lanthanum salt, 12 percent of cerium salt, 45 percent of aluminum sulfate and 25 percent of ferric sulfate.
The composite dephosphorizing agent provided by the application can be used for efficiently removing phosphide in wastewater treatment by compositing the organic high-molecular polymer, rare metal salt and inorganic salt, so that the pollution to the environment is reduced. The composite dephosphorizing agent can select different components and proportions according to actual needs so as to adapt to the treatment requirements of different waste water.
Compared with the traditional phosphide removing method, the compound dephosphorizing agent has the characteristics of small dosage, rapid reaction, high removal rate and low sludge yield, effectively removes phosphide in wastewater, reduces the consumption of chemical agents and the generation of sludge in the wastewater treatment process, and realizes high-efficiency and environment-friendly wastewater treatment.
As a further scheme of the application, the preparation method of the composite dephosphorizing agent for removing phosphide in wastewater comprises the following steps:
step one, preparing an organic high molecular polymer solution
Injecting deionized water into a reaction kettle, and ultrasonically dispersing an organic high molecular polymer consisting of cationic polyacrylamide, anionic polyacrylamide, sodium polyacrylate, chitosan and/or modified starch which are weighed according to mass percent into deionized water to obtain a polymer suspension;
stirring the polymer suspension until the polymer is completely dissolved to form a uniform organic high molecular polymer solution;
adding rare metal salts consisting of yttrium salt, lanthanum salt, cerium salt, neodymium salt, titanium salt, zirconium salt and/or vanadium salt which are weighed according to the mass ratio into the reaction kettle, and performing ultrasonic dispersion until the rare metal salts are completely dissolved to obtain a mixed solution A;
adding inorganic salt consisting of aluminum salt, calcium salt and/or ferric salt into the mixed solution A according to the mass ratio, and stirring the solution until the inorganic salt is completely dissolved to form a composite dephosphorizing agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
As a further aspect of the application, in step one, the polymer suspension is stirred until the polymer is completely dissolved, the water is heated to a temperature of 20-60 ℃, and the stirring time is 10-30 minutes under the condition of 1200-1500 rpm.
In the first step, deionized water is injected into a reaction kettle with the quantity of 1L, 15-30 g of organic high polymer is added into 1L of deionized water, and after the organic high polymer is dispersed in deionized water by ultrasonic, the mixture is stirred for 10-30 minutes until the polymer is completely dissolved, so as to obtain an organic high polymer solution.
In the second step, 71-96 g of rare metal salt is added into the reaction kettle, and the rare metal salt is dispersed by ultrasonic for 10-30 minutes at 20-60 ℃ until the rare metal salt is completely dissolved, so as to obtain a mixed solution A.
In the third step, 186-210 g of inorganic salt is added into the mixed solution A, and the inorganic salt is stirred for 30-60 minutes under the condition of 1200-1500 rpm until the inorganic salt is completely dissolved, so as to form a composite dephosphorizing agent mixed solution.
In the fourth step, the drying treatment is performed by adopting methods such as drying oven, vacuum drying or spray drying, and the like, and pelleting is performed by adopting a tabletting, granulating or pelleting mode, so as to obtain the composite dephosphorizing agent particles.
As a further scheme of the application, the application method of the composite dephosphorizing agent for removing phosphide in wastewater comprises the following steps:
1. the preparation stage:
(a) Check if the equipment such as metering pump of liquid medicine can be put into use, and discharge the medicine into medicine storage tank through centrifugal pump. For solid medicaments, water is used for dissolving and then adding the solid medicaments. During operation, care must be taken to ensure safety and avoid the medicament from entering the eyes by mistake.
(b) The anionic Polyacrylamide (PAM) in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill. The method comprises the following specific steps:
firstly, adding 1 ton of water into a dissolving tank, and starting stirring; slowly sprinkling 1kg of PAM into water, and stirring and dissolving for about 40-60 minutes; the dissolved solution should be transparent liquid, free of particles or micelles, and have a certain viscosity and stringiness.
2. Adding the medicine:
(a) After water inflow, firstly adding a composite dephosphorizing agent (GSP-1) and adding the agent according to the concentration of 80-500 ppm. Stirring after dosing can result in white flocs in the water.
(b) After the dosing is completed, the pH value of the water body is kept above 6.5.
(c) Adding PAM solution according to the concentration of 1000-3000 ppm, namely adding 1-3 kg of PAM into each ton of water according to the requirement; stirring is carried out after adding the medicine, so that the floccule becomes coarse and dense, and the sedimentation speed is higher.
3. Notice that:
(a) The effluent should have a clear quality and the total phosphorus content can be detected by taking the supernatant but not carry the suspended matter. If the detection result is not in accordance with the requirement, the dosage of the medicament can be increased, and the pH value of the effluent is ensured to be controlled to be more than 6.5.
(b) When the water inflow is started to be debugged, the dosage of the medicament can be increased, and the medicament is gradually reduced after the data are normal.
(c) GSP-1 and anionic Polyacrylamide (PAM) cannot be added at the same position, or can not be added after mixing. The two addition should be carried out separately from each other, and the water flow residence time of the addition interval should be more than 5 minutes.
4. Packaging and storing:
(a) The composite dephosphorizing agent is nonflammable, explosive and weak in acidity, belongs to non-dangerous goods and is convenient to transport.
(b) The composite dephosphorizing agent is stored in a ventilated shade place for 24 months.
As a further aspect of the present application, the wastewater treatment system may be a municipal wastewater treatment plant, industrial wastewater treatment facility, or other wastewater treatment system; the compound dephosphorizing agent can efficiently remove phosphide in the wastewater and has a certain defluorination effect, so that the phosphorus content in the treated water is reduced to meet the emission standard or the recycling requirement, the consumption of chemical agents and the generation of sludge in the wastewater treatment process can be reduced, and the treatment efficiency and the economy are improved.
Compared with the prior art, the composite dephosphorizing agent for removing phosphide in wastewater and the application method thereof have the following beneficial effects:
1. the reaction is rapid. After the medicament is released in water, the active ingredients in the medicament preferentially react with phosphide in combination. Compared with the traditional water purifying agent (the hydroxide colloid is firstly generated and phosphide is adsorbed during release), the reaction is more direct and rapid.
2. The dosage is small. A large number of experiments prove that the adding amount of the composite dephosphorizing agent is one sixth of that of the traditional polyaluminium and polyiron on the premise of the same phosphide removing rate. That is, the efficiency of the composite dephosphorizing agent is six times that of the traditional water purifying agent, and the advantages are very obvious.
3. The removal rate is high. Traditional water purifying agents have limited effect in removing phosphide. In particular to the special water quality, when the certain dosage is reached, the removal effect of phosphide is not increased by continuously increasing the dosage. The removal rate of the composite dephosphorizing agent is continuously improved along with the increase of the dosage by the excellent complexing precipitation capability, and the highest removal rate can reach 99.8 percent.
4. The mud yield is low. Under the same removal rate, the dosage is only one sixth of that of the traditional water purifying agent. The sludge in water is generally a precipitate substance formed after the medicament is released in the water, and the smaller the dosage is, the smaller the precipitate is generated, and the lower the sludge yield is. Can greatly lighten the sludge treatment pressure and save the sludge treatment cost.
5. Has very low effect on PH. As the traditional water purifying agent is basically an acidic water treating agent, OH-in water is consumed when the water is treated, so that the PH of water quality is reduced, and the PH needs to be recovered by quantitatively adding alkali, thereby increasing the water treatment cost. The acidity of the composite dephosphorizing agent is lower than that of other traditional dephosphorizing agents, the addition amount is small, and the PH of the composite dephosphorizing agent is 3.5-4.5. The two factors are combined together, so that the consumption of the medicament on OH-in water by the reaction in water is extremely small, the pH is basically recovered without adding liquid alkali, and the alkali adding cost is saved.
6. Has good turbidity removal and decoloration effects. The precipitate generated by the composite dephosphorizing agent in water is white floccule, and the floccule has long molecular chain and high density. The suspended substances are convenient to roll and sweep in the water, the precipitation is accelerated, the situations of dyeing and the like of the water body caused by improper dosing can be avoided, and the perception is better.
7. The compatibility to equipment is good. The composite dephosphorizing agent is an upgrading product of traditional polyaluminium and polyiron. The original dosing device can be suitable for the storage and dosing requirements of novel aluminum salt, and has low equipment and site criticality and good adaptability. Without adding or retrofitting equipment.
8. The preparation is flexible. The composite dephosphorizing agent can flexibly allocate the production proportion of the agent according to the water flocculation requirement and the dephosphorizing rate, so as to customize according to the requirement and better meet the market and customer processing requirement. Meanwhile, the device has two model states of liquid and solid, and is more flexible to use.
These and other aspects of the application will be more readily apparent from the following description of the embodiments. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application. In the drawings:
FIG. 1 is a schematic side view of PAC additive efficacy display in experimental efficacy comparison;
FIG. 2 is a schematic top view of PAC additive efficacy display in experimental efficacy comparison;
FIG. 3 is a schematic diagram showing the effects of GSP-1 addition in experimental effect comparison.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The technical scheme of the application is further described in detail below with reference to the specific embodiments.
Example 1
The embodiment of the application provides a composite dephosphorizing agent for removing phosphide in wastewater, which is prepared according to the following proportion (in percentage by mass):
cationic polyacrylamide: 10 percent of
Lanthanum salt: 12%
Cerium salt: 15%
Aluminum chloride: 63%
Step one, preparing an organic high molecular polymer solution
Injecting deionized water with the quantity of 1L into a reaction kettle, adding 30g of cationic polyacrylamide into 1L of deionized water, dispersing in deionized water by ultrasonic, heating the water to 35 ℃, and stirring for 25 minutes under the condition of 1300 revolutions per minute until the polymer is completely dissolved to obtain an organic high polymer solution;
adding 36g of lanthanum salt and 45g of cerium salt into the reaction kettle, and performing ultrasonic dispersion at 35 ℃ for 15 minutes until rare metal salt is completely dissolved to obtain a mixed solution A;
step three, 189g of aluminum chloride is added into the mixed solution A, and stirring is carried out for 45 minutes under the condition of 1300 revolutions per minute until the inorganic salt is completely dissolved, so as to form a composite dephosphorizing agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
In this embodiment, the application method of the composite dephosphorizing agent for removing phosphide in wastewater includes the following steps:
1. the preparation stage:
(a) Check if the equipment such as metering pump of liquid medicine can be put into use, and discharge the medicine into medicine storage tank through centrifugal pump. For solid medicaments, water is used for dissolving and then adding the solid medicaments. During operation, care must be taken to ensure safety and avoid the medicament from entering the eyes by mistake.
(b) The anionic Polyacrylamide (PAM) in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill. The method comprises the following specific steps:
firstly, adding 1 ton of water into a dissolving tank, and starting stirring; then slowly sprinkling 1kg of PAM into water, and stirring and dissolving for 50 minutes; the dissolved solution should be transparent liquid, free of particles or micelles, and have a certain viscosity and stringiness.
2. Adding the medicine:
(a) After water inflow, a composite dephosphorizing agent (GSP-1) was added first, and dosing was performed at a concentration of 350 ppm. Stirring after dosing can result in white flocs in the water.
(b) After the dosing is completed, the pH value of the water body is kept above 6.5.
(c) According to the requirement, adding the PAM solution according to the concentration of 2000ppm, namely adding 1.5kg of PAM into each ton of water; stirring is carried out after adding the medicine, so that the floccule becomes coarse and dense, and the sedimentation speed is higher.
3. Notice that:
(a) The effluent should have a clear quality and the total phosphorus content can be detected by taking the supernatant but not carry the suspended matter. If the detection result is not in accordance with the requirement, the dosage of the medicament can be increased, and the pH value of the effluent is ensured to be controlled to be more than 6.5.
(b) When the water inflow is started to be debugged, the dosage of the medicament can be increased, and the medicament is gradually reduced after the data are normal.
(c) GSP-1 and anionic Polyacrylamide (PAM) cannot be added at the same position, or can not be added after mixing. The two addition should be carried out separately from each other, and the water flow residence time of the addition interval should be more than 5 minutes.
4. Packaging and storing:
(a) The composite dephosphorizing agent is nonflammable, explosive and weak in acidity, belongs to non-dangerous goods and is convenient to transport.
(b) The composite dephosphorizing agent is stored in a ventilated shade place for 24 months.
The composite dephosphorizing agent is prepared according to the proportion, is added into the wastewater containing phosphide, and is subjected to precipitation separation after stirring reaction for 30 minutes. The concentration of phosphide in the wastewater after treatment is reduced to below 0.2 mg/L.
Example 2
The embodiment of the application provides a composite dephosphorizing agent for removing phosphide in wastewater, which is prepared according to the following proportion (in percentage by mass):
sodium polyacrylate: 8%
Lanthanum salt: 20 percent of
Cerium salt: 10 percent of
Ferric chloride: 42%
Aluminum chloride: 20 percent of
In this embodiment, the preparation steps of the composite dephosphorizing agent for removing phosphide in wastewater are as follows:
step one, preparing an organic high molecular polymer solution
Injecting deionized water with the quantity of 1L into a reaction kettle, adding 8g of sodium polyacrylate into 1L of deionized water, dispersing in deionized water by ultrasonic, heating the water to 20 ℃, and stirring for 10 minutes under the condition of 1500 revolutions per minute until the polymer is completely dissolved to obtain an organic high polymer solution;
adding 60g of lanthanum salt and 30g of cerium salt into the reaction kettle, and performing ultrasonic dispersion at 35 ℃ for 30 minutes until rare metal salt is completely dissolved to obtain a mixed solution A;
adding 126g of ferric chloride and 60g of aluminum chloride into the mixed solution A, and stirring for 30 minutes under the condition of 1500 revolutions per minute until the inorganic salt is completely dissolved to form a composite dephosphorization agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
In this embodiment, the application method of the composite dephosphorizing agent for removing phosphide in wastewater includes the following steps:
1. the preparation stage:
(a) Check if the equipment such as metering pump of liquid medicine can be put into use, and discharge the medicine into medicine storage tank through centrifugal pump. For solid medicaments, water is used for dissolving and then adding the solid medicaments. During operation, care must be taken to ensure safety and avoid the medicament from entering the eyes by mistake.
(b) The anionic Polyacrylamide (PAM) in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill. The method comprises the following specific steps:
firstly, adding 1 ton of water into a dissolving tank, and starting stirring; then slowly sprinkling 1kg of PAM into water, and stirring and dissolving for 40 minutes; the dissolved solution should be transparent liquid, free of particles or micelles, and have a certain viscosity and stringiness.
2. Adding the medicine:
(a) After water inflow, a composite dephosphorizing agent (GSP-1) is firstly added, and the dosing is carried out according to the concentration of 500 ppm. Stirring after dosing can result in white flocs in the water.
(b) After the dosing is completed, the pH value of the water body is kept above 6.5.
(c) Adding a PAM solution according to the concentration of 1500ppm as required, namely adding 3kg of PAM into each ton of water; stirring is carried out after adding the medicine, so that the floccule becomes coarse and dense, and the sedimentation speed is higher.
3. Notice that:
(a) The effluent should have a clear quality and the total phosphorus content can be detected by taking the supernatant but not carry the suspended matter. If the detection result is not in accordance with the requirement, the dosage of the medicament can be increased, and the pH value of the effluent is ensured to be controlled to be more than 6.5.
(b) When the water inflow is started to be debugged, the dosage of the medicament can be increased, and the medicament is gradually reduced after the data are normal.
(c) GSP-1 and anionic Polyacrylamide (PAM) cannot be added at the same position, or can not be added after mixing. The two addition should be carried out separately from each other, and the water flow residence time of the addition interval should be more than 5 minutes.
4. Packaging and storing:
(a) The composite dephosphorizing agent is nonflammable, explosive and weak in acidity, belongs to non-dangerous goods and is convenient to transport.
(b) The composite dephosphorizing agent is stored in a ventilated shade place for 24 months.
The composite dephosphorizing agent is prepared according to the proportion, is added into the wastewater containing phosphide, and is subjected to precipitation separation after stirring reaction for 30 minutes. The concentration of phosphide in the wastewater after treatment is reduced to below 0.1 mg/L.
Example 3
The embodiment of the application provides a composite dephosphorizing agent for removing phosphide in wastewater, which is prepared according to the following proportion (in percentage by mass):
cationic polyacrylamide: 5%
Titanium salt: 8%
Cerium salt: 25 percent of
Calcium chloride: 30%
Aluminum chloride: 32%
In this embodiment, the preparation steps of the composite dephosphorizing agent for removing phosphide in wastewater are as follows:
step one, preparing an organic high molecular polymer solution
Injecting deionized water with the quantity of 1L into a reaction kettle, adding 15g of cationic polyacrylamide into 1L of deionized water, dispersing in deionized water by ultrasonic, heating the water to 60 ℃, and stirring for 30 minutes under the condition of 1200 revolutions per minute until the polymer is completely dissolved to obtain an organic high polymer solution;
adding 24g of titanium salt and 75g of cerium salt into the reaction kettle, and performing ultrasonic dispersion at 60 ℃ for 30 minutes until rare metal salt is completely dissolved to obtain a mixed solution A;
adding 90g of calcium chloride and 96g of aluminum chloride into the mixed solution A, and stirring for 60 minutes under the condition of 1200 revolutions per minute until the inorganic salt is completely dissolved to form a composite dephosphorization agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
In this embodiment, the application method of the composite dephosphorizing agent for removing phosphide in wastewater includes the following steps:
1. the preparation stage:
(a) Check if the equipment such as metering pump of liquid medicine can be put into use, and discharge the medicine into medicine storage tank through centrifugal pump. For solid medicaments, water is used for dissolving and then adding the solid medicaments. During operation, care must be taken to ensure safety and avoid the medicament from entering the eyes by mistake.
(b) The anionic Polyacrylamide (PAM) in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill. The method comprises the following specific steps:
firstly, adding 1 ton of water into a dissolving tank, and starting stirring; then slowly sprinkling 1kg of PAM into water, and stirring and dissolving for 40 minutes; the dissolved solution should be transparent liquid, free of particles or micelles, and have a certain viscosity and stringiness.
2. Adding the medicine:
(a) After water inflow, a composite dephosphorizing agent (GSP-1) was added first, and dosing was performed at a concentration of 80 ppm. Stirring after dosing can result in white flocs in the water.
(b) After the dosing is completed, the pH value of the water body is kept above 6.5.
(c) Adding a PAM solution according to the concentration of 3000ppm, namely adding 1kg of PAM into each ton of water according to the requirement; stirring is carried out after adding the medicine, so that the floccule becomes coarse and dense, and the sedimentation speed is higher.
3. Notice that:
(a) The effluent should have a clear quality and the total phosphorus content can be detected by taking the supernatant but not carry the suspended matter. If the detection result is not in accordance with the requirement, the dosage of the medicament can be increased, and the pH value of the effluent is ensured to be controlled to be more than 6.5.
(b) When the water inflow is started to be debugged, the dosage of the medicament can be increased, and the medicament is gradually reduced after the data are normal.
(c) GSP-1 and anionic Polyacrylamide (PAM) cannot be added at the same position, or can not be added after mixing. The two addition should be carried out separately from each other, and the water flow residence time of the addition interval should be more than 5 minutes.
4. Packaging and storing:
(a) The composite dephosphorizing agent is nonflammable, explosive and weak in acidity, belongs to non-dangerous goods and is convenient to transport.
(b) The composite dephosphorizing agent is stored in a ventilated shade place for 24 months.
The composite dephosphorizing agent is prepared according to the proportion, is added into the wastewater containing phosphide, and is subjected to precipitation separation after stirring reaction for 30 minutes. The concentration of phosphide in the wastewater after treatment is reduced to below 0.2 mg/L.
The composite dephosphorizing agent is prepared according to the proportion, is added into the wastewater containing phosphide, and is subjected to precipitation separation after stirring reaction for 60 minutes. The concentration of phosphide in the wastewater after treatment is reduced to below 0.05 mg/L.
Example 4
The embodiment of the application provides a composite dephosphorizing agent for removing phosphide in wastewater, which is prepared according to the following proportion (in percentage by mass):
anionic polyacrylamide: 5%
Lanthanum salt: 13%
Cerium salt: 12%
Aluminum sulfate: 45%
Aluminum sulfate: 25 percent of
In this embodiment, the preparation steps of the composite dephosphorizing agent for removing phosphide in wastewater are as follows:
step one, preparing an organic high molecular polymer solution
Injecting deionized water with the quantity of 1L into a reaction kettle, adding 15g of anionic polyacrylamide into 1L of deionized water, dispersing in deionized water by ultrasonic, heating the water to 20 ℃, and stirring for 30 minutes under the condition of 1500 revolutions per minute until the polymer is completely dissolved to obtain an organic high polymer solution;
adding 39g of lanthanum salt and 36g of cerium salt into the reaction kettle, and performing ultrasonic dispersion at 20 ℃ for 30 minutes until rare metal salt is completely dissolved to obtain a mixed solution A;
adding 135g of aluminum sulfate and 75g of aluminum sulfate into the mixed solution A, and stirring for 30 minutes under the condition of 1500 revolutions per minute until the inorganic salt is completely dissolved to form a composite dephosphorization agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
In this embodiment, the application method of the composite dephosphorizing agent for removing phosphide in wastewater includes the following steps:
1. the preparation stage:
(a) Check if the equipment such as metering pump of liquid medicine can be put into use, and discharge the medicine into medicine storage tank through centrifugal pump. For solid medicaments, water is used for dissolving and then adding the solid medicaments. During operation, care must be taken to ensure safety and avoid the medicament from entering the eyes by mistake.
(b) The anionic Polyacrylamide (PAM) in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill. The method comprises the following specific steps:
firstly, adding 1 ton of water into a dissolving tank, and starting stirring; then slowly sprinkling 1kg of PAM into water, and stirring and dissolving for 50 minutes; the dissolved solution should be transparent liquid, free of particles or micelles, and have a certain viscosity and stringiness.
2. Adding the medicine:
(a) After water inflow, a composite dephosphorizing agent (GSP-1) was added first, and dosing was performed at a concentration of 350 ppm. Stirring after dosing can result in white flocs in the water.
(b) After the dosing is completed, the pH value of the water body is kept above 6.5.
(c) Adding a PAM solution according to the concentration of 1500ppm as required, namely adding 2kg of PAM into each ton of water; stirring is carried out after adding the medicine, so that the floccule becomes coarse and dense, and the sedimentation speed is higher.
3. Notice that:
(a) The effluent should have a clear quality and the total phosphorus content can be detected by taking the supernatant but not carry the suspended matter. If the detection result is not in accordance with the requirement, the dosage of the medicament can be increased, and the pH value of the effluent is ensured to be controlled to be more than 6.5.
(b) When the water inflow is started to be debugged, the dosage of the medicament can be increased, and the medicament is gradually reduced after the data are normal.
(c) GSP-1 and anionic Polyacrylamide (PAM) cannot be added at the same position, or can not be added after mixing. The two addition should be carried out separately from each other, and the water flow residence time of the addition interval should be more than 5 minutes.
4. Packaging and storing:
(a) The composite dephosphorizing agent is nonflammable, explosive and weak in acidity, belongs to non-dangerous goods and is convenient to transport.
(b) The composite dephosphorizing agent is stored in a ventilated shade place for 24 months.
The composite dephosphorizing agent is prepared according to the proportion, is added into the wastewater containing phosphide, and is subjected to precipitation separation after stirring reaction for 60 minutes. The concentration of phosphide in the wastewater after treatment is reduced to below 0.05 mg/L.
Example 5
The embodiment of the application provides a composite dephosphorizing agent for removing phosphide in wastewater, which is prepared according to the following proportion (in percentage by mass):
cationic polyacrylamide: 5%
Chitosan: 3%
Modified starch: 2%
Neodymium salt: 12%
Titanium salt: 8%
Vanadium salt: 6%
Ferric sulfate: 36%
Aluminum silicate: 28%
In this embodiment, the preparation steps of the composite dephosphorizing agent for removing phosphide in wastewater are as follows:
step one, preparing an organic high molecular polymer solution
Injecting deionized water with the amount of 1L into a reaction kettle, adding 15g of cationic polyacrylamide, 9g of chitosan and 6g of modified starch into 1L of deionized water, ultrasonically dispersing in deionized water, heating the water to 45 ℃, and stirring for 25 minutes under the condition of 1350 revolutions per minute until the polymer is completely dissolved to obtain an organic high polymer solution;
adding 36g of neodymium salt, 24g of titanium salt and 18g of vanadium salt into the reaction kettle, and performing ultrasonic dispersion at 45 ℃ for 30 minutes until rare metal salt is completely dissolved to obtain a mixed solution A;
step three, adding 108g of ferric sulfate and 84g of aluminum silicate into the mixed solution A, and stirring for 45 minutes under the condition of 1300 revolutions per minute until the inorganic salt is completely dissolved to form a composite dephosphorizing agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
In this embodiment, the application method of the composite dephosphorizing agent for removing phosphide in wastewater includes the following steps:
1. the preparation stage:
(a) Check if the equipment such as metering pump of liquid medicine can be put into use, and discharge the medicine into medicine storage tank through centrifugal pump. For solid medicaments, water is used for dissolving and then adding the solid medicaments. During operation, care must be taken to ensure safety and avoid the medicament from entering the eyes by mistake.
(b) The anionic Polyacrylamide (PAM) in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill. The method comprises the following specific steps:
firstly, adding 1 ton of water into a dissolving tank, and starting stirring; then slowly sprinkling 1kg of PAM into water, and stirring and dissolving for 60 minutes; the dissolved solution should be transparent liquid, free of particles or micelles, and have a certain viscosity and stringiness.
2. Adding the medicine:
(a) After water inflow, a composite dephosphorizing agent (GSP-1) was added first, and dosing was performed at a concentration of 400 ppm. Stirring after dosing can result in white flocs in the water.
(b) After the dosing is completed, the pH value of the water body is kept above 6.5.
(c) Adding a PAM solution according to the concentration of 1200ppm as required, namely adding 3kg of PAM into each ton of water; stirring is carried out after adding the medicine, so that the floccule becomes coarse and dense, and the sedimentation speed is higher.
Note that in this embodiment, the package storage is the same as in embodiments 1 to 4.
The composite dephosphorizing agent is prepared according to the proportion, is added into the wastewater containing phosphide, and is subjected to precipitation separation after stirring reaction for 60 minutes. The concentration of phosphide in the wastewater after treatment is reduced to below 0.15 mg/L.
Experimental effect comparison:
(1) Experimental data:
the composite dephosphorizing agent (GSP-1) for removing phosphide in wastewater prepared in example 1 was diluted 300 times, and commercially available polyaluminum chloride (Polyaluminum Chloride, PAC) was diluted 50 times, and a water sample was taken in an amount of 1L for phosphide removal test, and the test results were as follows:
(2) Referring to fig. 1 and 2, fig. 1 and 2 are schematic diagrams showing PAC additive effects, and fig. 3 is a schematic diagram showing GSP-1 additive effects. From the above test results, the data analysis of the additive effect can be shown as follows:
experimental data shows that the total phosphorus removal rate of PAC and GSP-1 is close to that of the same dosage, and the total phosphorus removal rate of PAC and GSP-1 is slightly better than that of the PAC and GSP-1. But from the dilution factor, the two differ by a factor of six. Therefore, under the condition of the same removal rate, the dosage of the GSP-1 is only one sixth of that of the polyaluminum, which fully proves that the GSP-1 is greatly superior to PAC in the aspects of removal rate and dosage, and is an excellent substitute of the traditional dephosphorization medicament.
In conclusion, the composite dephosphorizing agent for removing phosphide in wastewater and the application method thereof have the advantages that when phosphide in wastewater is removed, the reaction is rapid, and after the agent is released in water, the active ingredients in the agent preferentially react with phosphide in a combined way, so that the dosage is small, and the removal rate is high. In addition, the composite dephosphorizing agent has excellent complex precipitation capability, the removal rate is continuously improved along with the increase of the dosage, the highest removal rate can reach 99.8%, and the composite dephosphorizing agent also has a certain defluorination effect. Under the same removal rate, the smaller the dosage is, the fewer the produced sediment is, the lower the sludge yield is, the sludge treatment pressure can be greatly reduced, and the sludge treatment cost is saved. Has extremely low influence on PH, good turbidity removal and decoloration effects, good compatibility with equipment and flexible medicament allocation, and can better meet the market and customer processing demands.
While the preferred embodiments of the present application have been described in detail, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1. The composite dephosphorizing agent for removing phosphide in wastewater is characterized by being formed by compositing an organic high-molecular polymer, rare metal salt and inorganic salt, wherein the composite dephosphorizing agent comprises the following components in percentage by mass: 5% -10% of organic high molecular polymer, 27% -32% of rare metal salt and 62% -70% of inorganic salt compound; wherein:
the organic high molecular polymer comprises one or more of cationic polyacrylamide, anionic polyacrylamide, sodium polyacrylate, chitosan and modified starch; the rare metal salt is one or more of yttrium salt, lanthanum salt, cerium salt, neodymium salt, titanium salt, zirconium salt and vanadium salt; the inorganic salt comprises one or more of aluminum salt, calcium salt and ferric salt.
2. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 1, wherein the aluminum salt comprises one or more of aluminum sulfate, aluminum chloride, aluminum silicate and alum; the calcium salt comprises one or more of calcium chloride, calcium sulfate, calcium carbonate, calcium hydroxide and calcium oxalate; the ferric salt comprises one or more of ferric chloride, ferric sulfate and ferric nitrate.
3. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 2, which is characterized in that the content of cationic polyacrylamide is 10%, the content of lanthanum salt is 12%, the content of cerium salt is 15% and the content of aluminum chloride is 63% based on the total mass percent of the composite dephosphorizing agent.
4. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 2, which is characterized in that the content of sodium polyacrylate is 8%, the content of lanthanum salt is 20%, the content of cerium salt is 10%, the content of ferric chloride is 42% and the content of aluminum chloride is 20% based on the total mass percent of the composite dephosphorizing agent.
5. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 2, which is characterized in that the content of cationic polyacrylamide is 5%, the content of titanium salt is 8%, the content of cerium salt is 25%, the content of calcium chloride is 30% and the content of aluminum chloride is 32% based on the total mass percent of the composite dephosphorizing agent.
6. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 2, which is characterized in that the content of anionic polyacrylamide is 5%, the content of lanthanum salt is 13%, the content of cerium salt is 12%, the content of aluminum sulfate is 45% and the content of ferric sulfate is 25% based on the total mass percent of the composite dephosphorizing agent.
7. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 2, wherein the preparation method for removing phosphide in wastewater comprises the following steps:
step one, preparing an organic high molecular polymer solution
Injecting deionized water into a reaction kettle, and ultrasonically dispersing an organic high molecular polymer consisting of cationic polyacrylamide, anionic polyacrylamide, sodium polyacrylate, chitosan and/or modified starch which are weighed according to mass percent into deionized water to obtain a polymer suspension;
adding rare metal salts consisting of yttrium salt, lanthanum salt, cerium salt, neodymium salt, titanium salt, zirconium salt and/or vanadium salt which are weighed according to the mass ratio into the reaction kettle, and performing ultrasonic dispersion until the rare metal salts are completely dissolved to obtain a mixed solution A;
adding inorganic salt consisting of aluminum salt, calcium salt and/or ferric salt into the mixed solution A according to the mass ratio, and stirring the solution until the inorganic salt is completely dissolved to form a composite dephosphorizing agent mixed solution;
and fourthly, concentrating, filtering, drying and granulating the mixed solution of the composite dephosphorizing agent, and packaging and storing the granulated composite dephosphorizing agent to obtain a final composite dephosphorizing agent product.
8. The composite dephosphorizing agent for removing phosphide from wastewater according to claim 7, wherein in the first step, the polymer suspension is stirred until the polymer is completely dissolved, the water is heated to 20-60 ℃ and the stirring time is 10-30 minutes under the condition of 1200-1500 rpm.
9. The composite dephosphorizing agent for removing phosphide in wastewater according to claim 8, wherein in the first step, deionized water is injected into a reaction kettle in an amount of 1L, 15-30 g of organic high polymer is added into 1L of deionized water, and after ultrasonic dispersion in deionized water, the mixture is stirred for 10-30 minutes until the polymer is completely dissolved, so as to obtain an organic high polymer solution.
10. A method for using the composite dephosphorizing agent for removing phosphide in wastewater as set forth in any one of claims 1 to 9, characterized by comprising the steps of:
1) The preparation stage: a metering pump device for inspecting the liquid medicament and discharging the medicament into a medicament storage tank by a centrifugal pump; wherein, the solid medicament is added after being dissolved by water;
2) The anionic polyacrylamide in the composite dephosphorizing agent is dissolved in the concentration of 1 per mill;
3) Adding the medicine: adding a compound dephosphorizing agent after water inflow, adding a medicine according to the concentration of 80-500 ppm, and stirring until white floccules appear in the water after the medicine addition;
4) After the dosing is completed, the pH value of the water body is regulated to be more than 6.5, and the anionic polyacrylamide solution is added according to the concentration of 1000-3000 ppm, and stirring is carried out after the dosing.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6350383B1 (en) * | 1997-03-26 | 2002-02-26 | Commonwealth Scientific And Industrial Research Organisation | Remediation material and remediation process for sediments |
| JP2004121948A (en) * | 2002-10-01 | 2004-04-22 | Japan Organo Co Ltd | Fluorine or phosphorus removing method |
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| CN111977772A (en) * | 2020-08-10 | 2020-11-24 | 江苏泉之源环境技术有限公司 | Phosphorus removing agent for treating phosphorization wastewater |
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2023
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|---|---|---|---|---|
| US6350383B1 (en) * | 1997-03-26 | 2002-02-26 | Commonwealth Scientific And Industrial Research Organisation | Remediation material and remediation process for sediments |
| JP2004121948A (en) * | 2002-10-01 | 2004-04-22 | Japan Organo Co Ltd | Fluorine or phosphorus removing method |
| CN107311277A (en) * | 2017-07-04 | 2017-11-03 | 贵州美瑞特环保科技有限公司 | It is a kind of while removing nanometer medicament and preparation method thereof of arsenic phosphorus fluorine in water removal |
| CN111977772A (en) * | 2020-08-10 | 2020-11-24 | 江苏泉之源环境技术有限公司 | Phosphorus removing agent for treating phosphorization wastewater |
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