CN116375159A - Sewage purifying agent and preparation method thereof - Google Patents
Sewage purifying agent and preparation method thereof Download PDFInfo
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- CN116375159A CN116375159A CN202310479123.7A CN202310479123A CN116375159A CN 116375159 A CN116375159 A CN 116375159A CN 202310479123 A CN202310479123 A CN 202310479123A CN 116375159 A CN116375159 A CN 116375159A
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- Prior art keywords
- calcium lignosulfonate
- purifying agent
- ferric sulfate
- sewage purifying
- mixed solution
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- 239000010865 sewage Substances 0.000 title claims abstract description 75
- 239000012629 purifying agent Substances 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims abstract description 75
- 229920005551 calcium lignosulfonate Polymers 0.000 claims abstract description 58
- 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 abstract description 50
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 50
- 150000002191 fatty alcohols Chemical class 0.000 claims abstract description 18
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 18
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims description 60
- 238000003756 stirring Methods 0.000 claims description 43
- 229910052799 carbon Inorganic materials 0.000 claims description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000001035 drying Methods 0.000 claims description 21
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 17
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 17
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 17
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 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 8
- 238000000227 grinding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000010000 carbonizing Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009775 high-speed stirring Methods 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 19
- 239000011574 phosphorus Substances 0.000 abstract description 19
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 abstract description 2
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 239000002351 wastewater Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/52—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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- 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
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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a sewage purifying agent and a preparation method thereof, wherein the sewage purifying agent comprises 45-60 wt.% of modified polymeric aluminum ferric sulfate, 18-32 wt.% of calcium lignosulfonate, 11-20 wt.% of calcium lignosulfonate, and 2-5 wt.% of fatty alcohol polyoxyethylene ether phosphate sodium salt. The invention has good turbidity removal and phosphorus removal performances, stable product performance, flocculating sludge into particles, and simultaneously efficiently removing phosphorus in sewage, and has high sedimentation speed and strong turbidity removal capability.
Description
Technical Field
The invention relates to a sewage purifying agent and a preparation method thereof, and belongs to the technical field of purifying agents.
Background
In sewage treatment, sewage is purified to meet the water quality requirement of being discharged into a certain water body or reused, and in recent years, chemical method is generally adopted to remove phosphorus in yielding water to reach the standard due to the water quality upgrading required by urban sewage treatment, but the research on a phosphorus-removing sewage purifying agent with good turbidity removal and phosphorus removal performances is relatively less.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the sewage purifying agent and the preparation method thereof, wherein the sewage purifying agent has good turbidity removal and phosphorus removal performances, the product performance is stable, the sludge is flocculated into particles, meanwhile, the phosphorus in the sewage is efficiently removed, the sedimentation speed is high, and the turbidity removal capacity is strong; the preparation method is simple to operate, the process conditions can be effectively controlled, and the method is suitable for industrial production.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the sewage purifying agent comprises 45-60 wt.% of modified polymeric aluminum ferric sulfate, 18-32 wt.% of calcium lignosulfonate, 11-20 wt.% of calcium lignosulfonate derivative carbon and 2-5 wt.% of fatty alcohol polyoxyethylene ether phosphate sodium salt;
the modified polymeric aluminum ferric sulfate is obtained by curing ferric sulfate, aluminum sulfate and carboxymethyl cellulose;
the calcium lignosulfonate derived carbon is obtained by carbonizing calcium lignosulfonate.
Preferably, the sum of the calcium lignosulfonate and the calcium lignosulfonate derived carbon is 75-83% of the modified polymeric aluminum ferric sulfate by mass, and the mass ratio of the calcium lignosulfonate is larger than that of the calcium lignosulfonate derived carbon.
Preferably, the preparation method of the modified polyaluminum ferric sulfate comprises the following steps: mixing ferric sulfate and aluminum sulfate in carboxymethyl cellulose solution, heating and curing, concentrating, drying and grinding to obtain modified polymeric aluminum ferric sulfate;
preferably, the specific preparation steps of the modified polyaluminum ferric sulfate are as follows: dissolving carboxymethyl cellulose in pure water to form carboxymethyl cellulose solution, mixing ferric sulfate and aluminum sulfate to form inorganic mixture, adding the inorganic mixture into the carboxymethyl cellulose solution, stirring and mixing uniformly, heating to 35-45 ℃ for curing for 24-28 h, concentrating, drying and grinding to obtain the modified polymeric aluminum ferric sulfate.
Preferably, the molar ratio of the ferric sulfate, the aluminum sulfate and the carboxymethyl cellulose is 1:2.5:1.2.
Preferably, the mass of the pure water is 1.5 to 2 times that of the carboxymethyl cellulose.
Preferably, the particle size of the modified polyaluminum ferric sulfate is less than 120 μm.
Preferably, the preparation method of the calcium lignosulfonate derivative carbon comprises the following steps: under the protection of inert gas, heating and carbonizing calcium lignosulfonate, flushing and grinding to obtain the calcium lignosulfonate derivative carbon.
Preferably, the specific preparation steps of the calcium lignosulfonate derivative carbon are as follows: under the protection of inert gas, heating the calcium lignosulfonate to 380-400 ℃ from room temperature, maintaining for 2-2.5 h, cooling to room temperature, washing with pure water, drying and grinding to obtain the calcium lignosulfonate derivative carbon.
Preferably, the heating rate is 10-12 ℃/min.
Preferably, the calcium lignosulfonate derived carbon has a particle size of less than 100 μm.
The invention also provides a preparation method of the sewage purifying agent, which comprises the following steps:
(1) Dissolving the sodium salt of the fatty alcohol polyoxyethylene ether phosphate in the weight part into pure water, and stirring for 30-50 min at 30-35 ℃ to obtain a mixed solution A;
(2) Adding the modified polyaluminium ferric sulfate in the weight part into the mixed solution A, and stirring for 1-1.5 h at the temperature of 40-45 ℃ to obtain a mixed solution B;
(3) Adding the calcium lignosulfonate and the calcium lignosulfonate derivative carbon in the weight parts into the mixed solution B, stirring at a high speed for 2-3 hours at a temperature of 40-45 ℃, and then carrying out pneumatic drying to obtain the sewage purifying agent.
Preferably, in the step (1), the mass of the pure water is 1 to 1.5 times that of the modified polyaluminum ferric sulfate.
Preferably, in step (1) and step (2), the stirring speed is 800-1200 rpm.
Preferably, in step (3), the high speed stirring is carried out at a rate of 2000 to 2500rpm.
Preferably, in step (4), the temperature of the air-drying is 55-65 ℃.
The invention has the beneficial effects that: the sewage purifying agent has the high-density positive charge of the inorganic flocculant and the active group of the organic flocculant, and simultaneously has good adsorption effect; the sewage purifying agent disclosed by the invention has the advantages that the product performance is stable, suspended matters flocculate into particles, meanwhile, the phosphorus in the sewage is efficiently removed, the sedimentation speed is high, and the turbidity removing capability is strong; the sewage purifying agent disclosed by the invention does not cause secondary pollution, has the advantages of high efficiency, low consumption, stable performance, safety and innocuity, and can realize the environment-friendly, high-efficiency and safety of the sewage purifying agent; the preparation method disclosed by the invention is simple to operate, the process conditions can be effectively controlled, special chemical equipment is not needed, and the preparation method is suitable for industrial production.
Detailed Description
The invention will now be more clearly and more fully described by way of the following specific examples, which are not intended to be limiting.
Example 1
The preparation method of the modified polymeric aluminum ferric sulfate comprises the following specific steps: 288g of carboxymethyl cellulose is dissolved in 460g of pure water to form carboxymethyl cellulose solution, 400g of ferric sulfate and 855g of aluminum sulfate are mixed to form inorganic mixture, the inorganic mixture is added into the carboxymethyl cellulose solution and stirred and mixed uniformly, the inorganic mixture is heated to 35-45 ℃ for curing for 24-28 hours, then the mixture is heated to 90-95 ℃ for concentration, then dried in a vacuum drying oven at 75 ℃, and then ground in a grinder to obtain the modified polymeric aluminum ferric sulfate, wherein the particle size of the modified polymeric aluminum ferric sulfate is measured to be less than 100 mu m, the average particle size is 102 mu m, and the dispersivity is 0.242.
The mass of pure water in this example was selected in the range of 1.5 to 2 times the mass of carboxymethyl cellulose, the curing temperature was selected in the range of 35 to 45℃and the curing time was selected in the range of 24 to 28 hours.
Example 2
The preparation method of the calcium lignosulfonate derivative carbon comprises the following specific steps: 500g of calcium lignosulfonate is placed in a carbonization furnace, inert gas is introduced to protect nitrogen in the carbonization furnace, then the temperature of the calcium lignosulfonate is raised to 380 ℃ from room temperature according to the heating speed of 12 ℃/min, then the temperature is kept for 2-2.5 h, the calcium lignosulfonate is cooled to room temperature, pure water is used for washing and removing surface impurities, the calcium lignosulfonate is dried in a vacuum drying oven at 75 ℃, and then the calcium lignosulfonate is placed in a grinding machine for grinding, so that the calcium lignosulfonate derivative carbon is obtained, the particle size of the calcium lignosulfonate derivative carbon is smaller than 100 mu m, the average particle size is 90 mu m, and the dispersity is 0.231;
the inert gas in this example may be one of nitrogen, argon, etc., the heating rate is selected in the range of 10-12 ℃/min, and the carbonization temperature is selected in the range of 380-400 ℃.
The modified polyaluminum ferric sulfate prepared in example 1 and the calcium lignosulfonate derivative carbon prepared in example 2 are used for preparing sewage purifying agents, and particularly examples 3 to 15 are described in detail below.
Example 3
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 4g of fatty alcohol polyoxyethylene ether phosphate sodium salt into 120g of pure water, and stirring at 30-35 ℃ and 800rpm for 50min to obtain a mixed solution A;
(2) 120g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1.5 hours at 40-45 ℃ and 800 rpm;
(3) 36g of calcium lignosulfonate and 40g of calcium lignosulfonate derived carbon are added into the mixed solution B, the mixture is stirred at a high speed for 3 hours at a temperature of between 40 and 45 ℃ and at a speed of 2000rpm, and then air flow drying is carried out at a temperature of 55 ℃ to obtain the sewage purifying agent.
Example 4
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 4.65g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 128g of pure water, and stirring at 30-35 ℃ and 1000rpm for 40min to obtain a mixed solution A;
(2) 83.1g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1.2 hours at 40-45 ℃ and 1000 rpm;
(3) Adding 37.5g of calcium lignosulfonate and 24.75g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2200rpm for 2.5h, and performing air flow drying at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 5
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 7g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 137.5g of pure water, and stirring at 30-35 ℃ and 1200rpm for 30min to obtain a mixed solution A;
(2) 110g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1h at 40-45 ℃ and 1200rpm;
(3) Adding 43g of calcium lignosulfonate and 40g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2500rpm for 2 hours, and performing air flow drying at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 6
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 7.5g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 120g of pure water, and stirring at 30-35 ℃ and 1000rpm for 40min to obtain a mixed solution A;
(2) 79.5g of modified polymeric aluminum ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1.2 hours at 40-45 ℃ and 1000 rpm;
(3) Adding 37.5g of calcium lignosulfonate and 25.5g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2200rpm for 2.5h, and performing air flow drying at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 7
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 8g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 125g of pure water, and stirring at 30-35 ℃ and 1200rpm for 40min to obtain a mixed solution A;
(2) 104g of modified polyaluminium ferric sulfate is added into the mixed solution A, and stirred for 1.5 hours at the temperature of 40-45 ℃ and the rpm of 1000rpm to obtain mixed solution B;
(3) Adding 62g of calcium lignosulfonate and 24g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2000rpm for 2.5h, and performing air flow drying at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 8
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 10g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 135g of pure water, and stirring at 30-35 ℃ and 1000rpm for 30min to obtain a mixed solution A;
(2) 104g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1h at 40-45 ℃ and 800 rpm;
(3) 56g of calcium lignosulfonate and 24g of calcium lignosulfonate derived carbon are added into the mixed solution B, the mixture is stirred at a high speed for 3 hours at 40-45 ℃ and 2500rpm, and then air flow drying is carried out at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 9
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 10g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 135g of pure water, and stirring at 30-35 ℃ and 1000rpm for 30min to obtain a mixed solution A;
(2) 104g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1h at 40-45 ℃ and 800 rpm;
(3) Adding 42g of calcium lignosulfonate and 44g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2500rpm for 3 hours, and performing air flow drying at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 10
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 7g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 150g of pure water, and stirring at 30-35 ℃ and 1200rpm for 40min to obtain a mixed solution A;
(2) 108g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1.5 hours at the temperature of 40-45 ℃ and the rpm of 1000 rpm;
(3) And adding 38g of calcium lignosulfonate and 47g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2000rpm for 2.5 hours, and performing air flow drying at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 11
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 6g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 90g of pure water, and stirring at 30-35 ℃ and 1000rpm for 40min to obtain a mixed solution A;
(2) 90g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1.2 hours at the temperature of 40-45 ℃ and the rpm of 1000 rpm;
(3) 50g of calcium lignosulfonate and 56g of calcium lignosulfonate derived carbon are added into the mixed solution B, the mixture is stirred at a high speed for 2.5 hours at 40-45 ℃ and 2200rpm, and then air flow drying is carried out at a temperature of 60 ℃ to obtain the sewage purifying agent.
Example 12
The preparation of the sewage purifying agent comprises the following steps:
(1) Dissolving 5g of fatty alcohol polyoxyethylene ether phosphate sodium salt in 144g of pure water, and stirring at 30-35 ℃ and 800rpm for 50min to obtain a mixed solution A;
(2) 96g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1.5 hours at 40-45 ℃ and 800 rpm;
(3) Adding 47g of calcium lignosulfonate and 56g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2000rpm for 3 hours, and performing air flow drying at a temperature of 55 ℃ to obtain the sewage purifying agent.
Example 13
The preparation of the sewage purifying agent comprises the following steps:
(1) 9g of fatty alcohol polyoxyethylene ether phosphate sodium salt is dissolved in 115g of pure water, and stirred for 50min at 30-35 ℃ and 800rpm to obtain a mixed solution A;
(2) Adding 109g of modified polyaluminium ferric sulfate into the mixed solution A, and stirring for 1.5 hours at 40-45 ℃ and 800rpm to obtain a mixed solution B;
(3) 60g of calcium lignosulfonate and 22g of calcium lignosulfonate derived carbon are added into the mixed solution B, the mixture is stirred at a high speed for 3 hours at a temperature of between 40 and 45 ℃ and at a speed of 2000rpm, and then air flow drying is carried out at a temperature of 55 ℃ to obtain the sewage purifying agent.
Example 14
The preparation of the sewage purifying agent comprises the following steps:
(1) 9g of fatty alcohol polyoxyethylene ether phosphate sodium salt is dissolved in 115g of pure water, and stirred for 50min at 30-35 ℃ and 800rpm to obtain a mixed solution A;
(2) Adding 107g of modified polyaluminium ferric sulfate into the mixed solution A, and stirring for 1.5 hours at 40-45 ℃ and 800rpm to obtain a mixed solution B;
(3) Adding 34g of calcium lignosulfonate and 50g of calcium lignosulfonate derived carbon into the mixed solution B, stirring at a high speed at 40-45 ℃ and 2000rpm for 3 hours, and performing air flow drying at a temperature of 55 ℃ to obtain the sewage purifying agent.
Example 15
The preparation of the sewage purifying agent comprises the following steps:
(1) 9g of fatty alcohol polyoxyethylene ether phosphate sodium salt is dissolved in 104g of pure water, and stirred for 30min at 30-35 ℃ and 1000rpm to obtain a mixed solution A;
(2) 104g of modified polyaluminium ferric sulfate is added into the mixed solution A, and the mixed solution B is obtained after stirring for 1h at 40-45 ℃ and 800 rpm;
(3) 50g of calcium lignosulfonate and 37g of calcium lignosulfonate derived carbon are added into the mixed solution B, the mixture is stirred at a high speed for 3 hours at 40-45 ℃ and 2500rpm, and then air flow drying is carried out at a temperature of 60 ℃ to obtain the sewage purifying agent.
The wastewater purifying agents prepared in examples 1 to 15 were used for the test evaluation of dephosphorization-flocculation performance: the sewage purifying agents prepared in the above examples 1 to 15 were prepared by preparing 4% aqueous solutions with pure water respectively using modified polyaluminum ferric sulfate, and lignin calcium sulfonate derived carbon as control groups (comparative example 1 is modified polyaluminum ferric sulfate, comparative example 2 is polyaluminum ferric sulfate, and comparative example 3 is lignin calcium sulfonate derived carbon), stirring to dissolve thoroughly, adding the above solutions into a certain amount of phosphorus-containing grease municipal sewage with slow stirring, finally making the mass concentration of the anhydrous purifying agent in the wastewater be 60mg/L, then continuing to stir the solution slowly for 5min, and standing for 25min.
1. Observing the formation speed, the size and the sinking speed of the flocs in the experimental process:
in the experimental process, the sewage purifying agents prepared in the examples 1 to 15 are added into phosphorus-containing grease urban sewage, suspended matters in the sewage are aggregated to form particles, the particles can be quickly settled, and the treated water quality becomes clear and bright; the modified polyaluminum ferric sulfate of comparative example 1 and the polyaluminum ferric sulfate of comparative example 2 flocculate suspended matters in sewage to form alum blossom, but the sedimentation speed is slower, and the water quality treated by comparative example 1 and comparative example 2 is more turbid than the water quality of examples 1 to 15; the calcium lignosulfonate-derived carbon of comparative example 3 also caused suspended matter in the water to flocculate, but the flocculation rate was slow, the sedimentation rate was slower, and the water quality of comparative example 3 was cloudy.
2. The phosphorus-containing oily municipal sewage before and after the treatment was tested, and the suspended matter content in the phosphorus-containing oily municipal sewage measured at the beginning was 80.3mg/L, the phosphorus content was 9.9mg/L and the light transmittance was 68.6%, and the results of the test on the treated sewage, the suspended matter content (mg/L), the phosphorus content (mg/L), the light transmittance (%), the suspended matter removal (%), and the phosphorus removal (%) were shown in Table 1.
As can be seen from Table 1, the wastewater purifying agents prepared in examples 1 to 15 of the present invention have a removal rate of suspended matters in wastewater of more than 98%, a transmittance of more than 98.5% after wastewater treatment, and a phosphorus removal rate of more than 98.5% in wastewater, and the wastewater purifying agent of the present invention has good turbidity removal performance and good phosphorus removal performance; in the sewage purifying agents of the embodiments 5 to 8 and 13, the sum of the calcium lignosulfonate and the calcium lignosulfonate derived carbon is 75 to 83 percent of modified polymeric aluminum ferric sulfate, the mass ratio of the calcium lignosulfonate is larger than that of the calcium lignosulfonate derived carbon, the suspended matter removal rate and the phosphorus removal rate are over 99 percent, the transmittance after sewage treatment is over 99 percent, and the sewage purifying agents of the embodiments 5 to 8 and 13 have more turbidity removal and phosphorus removal performances; the removal rate of suspended matters and phosphorus elements in the sewage in comparative examples 1 to 3 is obviously lower than that of the sewage purifying agent of the invention, and the water quality standard required by urban sewage treatment is not met.
TABLE 1 effects after sewage treatment
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution of the present invention, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified or equivalently replaced without departing from the spirit and scope of the present invention, and any modification or partial replacement thereof should be included in the scope of the claims of the present invention.
Claims (10)
1. The sewage purifying agent is characterized by comprising 45-60 wt.% of modified polymeric aluminum ferric sulfate, 18-32 wt.% of calcium lignosulfonate, 11-20 wt.% of calcium lignosulfonate derivative carbon and 2-5 wt.% of fatty alcohol polyoxyethylene ether phosphate sodium salt;
the modified polymeric aluminum ferric sulfate is obtained by curing ferric sulfate, aluminum sulfate and carboxymethyl cellulose;
the calcium lignosulfonate derived carbon is obtained by carbonizing calcium lignosulfonate.
2. The sewage purifying agent according to claim 1, wherein the sum of calcium lignosulfonate and calcium lignosulfonate derived carbon is 75-83% by mass of modified polymeric aluminum ferric sulfate, and the mass ratio of calcium lignosulfonate is greater than the mass ratio of calcium lignosulfonate derived carbon.
3. The sewage purifying agent according to claim 1, wherein the specific preparation steps of the modified polyaluminum ferric sulfate are as follows: dissolving carboxymethyl cellulose in pure water to form carboxymethyl cellulose solution, mixing ferric sulfate and aluminum sulfate to form inorganic mixture, adding the inorganic mixture into the carboxymethyl cellulose solution, stirring and mixing uniformly, heating to 35-45 ℃ for curing for 24-28 h, concentrating, drying and grinding to obtain modified polymeric aluminum ferric sulfate, wherein the particle size of the modified polymeric aluminum ferric sulfate is smaller than 120 mu m.
4. A sewage purifying agent according to claim 3, wherein the molar ratio of ferric sulfate, aluminum sulfate and carboxymethyl cellulose is 1:2.5:1.2; the mass of the pure water is 1.5 to 2 times of that of the carboxymethyl cellulose.
5. The sewage purifying agent according to claim 1, wherein the specific preparation steps of the calcium lignosulfonate derivative carbon are as follows: under the protection of inert gas, heating the calcium lignosulfonate to 380-400 ℃ from room temperature, maintaining for 2-2.5 h, cooling to room temperature, washing with pure water, drying and grinding to obtain the calcium lignosulfonate derivative carbon, wherein the particle size of the calcium lignosulfonate derivative carbon is smaller than 100 mu m.
6. A sewage purification agent according to claim 5, wherein the heating rate is 10 to 12 ℃/min.
7. A method for producing a sewage purifying agent according to any one of claims 1 to 6, comprising the steps of:
(1) Dissolving the sodium salt of the fatty alcohol polyoxyethylene ether phosphate in the weight part into pure water, and stirring for 30-50 min at 30-35 ℃ to obtain a mixed solution A;
(2) Adding the modified polyaluminium ferric sulfate in the weight part into the mixed solution A, and stirring for 1-1.5 h at the temperature of 40-45 ℃ to obtain a mixed solution B;
(3) Adding the calcium lignosulfonate and the calcium lignosulfonate derivative carbon in the weight parts into the mixed solution B, stirring at a high speed for 2-3 hours at a temperature of 40-45 ℃, and then carrying out pneumatic drying to obtain the sewage purifying agent.
8. The process for producing a sewage purifying agent according to claim 7, wherein in the step (1), the mass of pure water is 1 to 1.5 times the mass of the modified polyaluminum ferric sulfate.
9. The process for preparing a sewage purifying agent according to claim 7, wherein in the step (1) and the step (2), the stirring rate is 800 to 1200rpm; in the step (3), the high-speed stirring speed is 2000-2500 rpm.
10. The process for preparing a sewage purifying agent according to claim 7, wherein in the step (4), the temperature of the pneumatic drying is 55 to 65 ℃.
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