CN113149356A - Efficient phosphorus removal composite filler and preparation method thereof - Google Patents
Efficient phosphorus removal composite filler and preparation method thereof Download PDFInfo
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- CN113149356A CN113149356A CN202110450064.1A CN202110450064A CN113149356A CN 113149356 A CN113149356 A CN 113149356A CN 202110450064 A CN202110450064 A CN 202110450064A CN 113149356 A CN113149356 A CN 113149356A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/108—Immobilising gels, polymers or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
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- Water Treatment By Sorption (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a high-efficiency phosphorus removal composite filler and a preparation method thereof, wherein the preparation method comprises the following steps: step one, stirring and dissolving polyvinyl alcohol in water at 95 ℃ to form a stable solution; step two, bonding and molding the chemical phosphorus removing agent by using a polyvinyl alcohol aqueous solution, drying the chemical phosphorus removing agent in a drying oven at 105 ℃, and crushing the chemical phosphorus removing agent to obtain phosphorus removing agent particles with the particle size of 20-200 meshes; adding phosphorus removing agent particles, a catalyst, a surfactant, a cross-linking agent and sodium bicarbonate into a polyvinyl alcohol aqueous solution, stirring at a high speed, foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for solidification and shaping; and step four, demolding, cleaning, drying, and cutting into blocks with corresponding sizes as required to obtain the phosphorus removal composite filler. The invention has the advantages of simple manufacturing process, stable chemical property of the filler, easy film formation, large porosity, high mechanical strength, excellent adsorption efficiency and adsorption quantity and excellent phosphorus removal performance.
Description
Technical Field
The invention belongs to the field of sewage treatment, relates to a sewage treatment material, and particularly relates to an efficient phosphorus removal composite filler and a preparation method thereof.
Background
Along with the development of industrial and agricultural industries in China and the improvement of the living standard of people, the discharge amount of urban sewage is rapidly increased, and the untreated sewage is discharged into lakes and rivers, so that the pollution of nitrogen and phosphorus in water bodies is more and more serious day by day, and the direct result is the eutrophication of the water bodies. The problem of water eutrophication is always a serious environmental problem in water pollution, and poses great threat to human health and ecological environment. The difficulty in removing nitrogen, phosphorus and other nutrients in the water body is high, and no single biological, chemical and physical measures are available so far to thoroughly remove the nitrogen and phosphorus nutrients in the wastewater.
Phosphorus, which is different from nitrogen and sulfur, cannot be gaseous in either its oxidized or reduced state and is emitted into the air, and can be collected as a solid only by chemical or biological methods. Therefore, the phosphorus removal method can be divided into two main types, namely a physicochemical treatment method and a biological treatment method, and the chemical phosphorus removal method is to convert phosphorus in sewage into insoluble phosphate precipitates by adding a chemical agent to form sludge so as to realize the removal of the phosphorus. The chemical phosphorus removal method has the problems of expensive medicament, high operating cost, generation of a large amount of chemical sludge, secondary pollution caused by re-release of phosphate radicals in the sludge and the like. The biological method utilizes the metabolism process of microorganisms such as phosphorus-accumulating bacteria and the like to convert phosphorus from sewage into sludge and discharge the sludge out of the system. The biological phosphorus removal has the problems of unstable treatment effect, phosphorus release of sludge and the like, and the phosphorus removal effect is easily influenced by factors such as BOD/TP ratio, temperature, pH value, dissolved oxygen and the like of the environment.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the efficient phosphorus removal composite filler and the preparation method thereof, and the phosphorus removal filler has the advantages of good stability in water, simple manufacturing process, low production cost, high filler porosity, large specific surface area, large microbial load, strong pollutant removal capacity and good phosphorus removal effect.
In order to realize the purpose, the invention provides a preparation method of a high-efficiency phosphorus removal composite filler, which is characterized by comprising the following steps: the method comprises the following steps: step one, stirring and dissolving polyvinyl alcohol in water at 95 ℃ to form stable solution; step two, bonding and molding the chemical phosphorus removing agent by using a polyvinyl alcohol aqueous solution, drying the chemical phosphorus removing agent in a drying oven at 105 ℃, and crushing the chemical phosphorus removing agent to prepare phosphorus removing agent particles with the particle size of 20-200 meshes; adding phosphorus removing agent particles, a catalyst, a surfactant, a cross-linking agent and sodium bicarbonate into a polyvinyl alcohol aqueous solution, stirring at a high speed for foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for curing and shaping; and step four, demolding, cleaning, drying, and cutting into blocks with corresponding sizes as required to obtain the phosphorus removal composite filler.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the first step, 100 parts by weight of polyvinyl alcohol and 400-1900 parts by weight of water are added.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the first step, the average polymerization degree of the polyvinyl alcohol is 300-2600, and the alcoholysis degree is 60-99.9%.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the second step, the chemical phosphorus removal agent is one or more of aluminum sulfate, ferric sulfate, ferrous sulfate, ferric chloride, ferrous chloride, sodium aluminate, polyferric salt and polyaluminium salt.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the third step, 100 parts of polyvinyl alcohol aqueous solution, 20-60 parts of phosphorus removing agent particles, 2-12 parts of catalyst, 1-5 parts of surfactant, 3-18 parts of cross-linking agent and 0.1-1 part of sodium bicarbonate by weight.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the third step, the catalyst is one or more of hydrochloric acid, sulfuric acid, nitric acid or boric acid.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the third step, the surfactant is one or more of OP-10, Tween-80, sodium dodecyl benzene sulfonate, Triton-100 and dodecyl dimethyl benzyl ammonium chloride.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the third step, the cross-linking agent is formaldehyde or glutaraldehyde.
Further, the invention provides a preparation method of the efficient phosphorus removal composite filler, which can also have the following characteristics: in the third step, the foaming stirring speed is 800-.
The invention also protects the high-efficiency dephosphorization composite filler prepared by the preparation method.
The invention has the beneficial effects that: the invention provides a high-efficiency phosphorus removal composite filler and a preparation method thereof, the composite filler combines a chemical treatment method and a biological treatment method, a polyvinyl alcohol condensation compound is used as a main component, a chemical phosphorus removal agent is wrapped in the filler, the surface of the filler is of a porous structure and has a large specific surface area, conditions are provided for the attachment growth of microorganisms such as phosphorus accumulating bacteria, and the like, the problems of high phosphorus content in water, adverse biological phosphorus removal and low chemical phosphorus removal effect and the like when the phosphorus content is low are effectively solved through the synergistic phosphorus removal of the chemical phosphorus removal agent and the phosphorus accumulating bacteria, and the influence of water quality fluctuation on the phosphorus removal effect is favorably reduced. Specifically, the method comprises the following steps:
the chemical phosphorus removal agent is coated by polyvinyl alcohol (PVA), the release of the chemical phosphorus removal agent can be controlled by controlling the proportion of the PVA, and the excessive addition of the chemical phosphorus removal agent is avoided, so that not only is waste caused, but also the carbon-phosphorus ratio in a water body is disordered to influence the biochemical effect;
when the phosphorus content of the water body is high, the effect of chemical phosphorus removal is favorably exerted, when the phosphorus content is low, the effect of biological phosphorus removal is more favorably exerted, the filler is combined with the chemical phosphorus removal and the biological phosphorus removal at the same time, the application range is wider, and the influence of the fluctuation of the water quality on the phosphorus removal effect is effectively reduced;
thirdly, precipitates generated by reaction of the released chemical phosphorus removal agent and phosphorus in the water body are attached to the surface of the suspended filler, so that phosphorus elements released by the precipitates again can be directly absorbed by microorganisms on the surface of the filler while the amount of sludge is reduced, and secondary pollution is avoided;
the filler takes PVA as a main component, has extremely excellent hydrophilicity and biocompatibility, has high porosity and large specific surface area, is more favorable for film formation, and has short film formation time and large microorganism attachment amount;
the cross-linking and bonding effects of PVA significantly improve the mechanical strength, the pore structure and the wear resistance of the composite filler, and prolong the service life of the filler;
sixthly, the preparation method has mild conditions, simple process, high production efficiency, short production period, strong pollutant removing capability and good phosphorus removing effect.
Detailed Description
The present invention will be further described with reference to specific embodiments, and the following examples are only used to more clearly illustrate the technical solutions of the present invention, but not to limit the scope of the present invention.
Example 1
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 1788 is stirred and dissolved in 400 parts of 95 ℃ water to form a stable solution.
And step two, bonding and molding the chemical phosphorus removing agent aluminum sulfate by using a polyvinyl alcohol aqueous solution, drying the product in an oven at 105 ℃, and crushing the product to obtain phosphorus removing agent particles with the particle size of 20-200 meshes.
And step three, adding 20 parts of dephosphorizing agent particles, 2 parts of catalyst sulfuric acid, 1 part of surfactant OP-10, 6 parts of cross-linking agent formaldehyde and 0.1 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring and foaming at a high speed of 2000rpm for 2min, pouring into a mold, and preserving heat at 65 ℃ for 12h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 2 hours, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 18 hours, and the phosphorus removal effect is obvious.
Example 2
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 1799 is stirred and dissolved in 400 parts of 95 ℃ water to form a stable solution.
And step two, bonding and molding the chemical phosphorus removing agent ferric sulfate by using a polyvinyl alcohol aqueous solution, drying the product in an oven at 105 ℃, and crushing the product to obtain phosphorus removing agent particles with the particle size of 20-200 meshes.
And step three, adding 40 parts of phosphorus removing agent particles, 4 parts of catalyst sulfuric acid, 2 parts of surfactant sodium dodecyl benzene sulfonate, 9 parts of cross-linking agent formaldehyde and 0.5 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring at a high speed of 1500rpm, foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for 6h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 1 hour, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 6 hours, and the phosphorus removal effect is obvious.
Example 3
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 2088 is stirred and dissolved in 1150 parts of 95 ℃ water to form a stable solution.
And step two, binding and forming the chemical phosphorus removing agent ferrous sulfate with a polyvinyl alcohol aqueous solution, drying in an oven at 105 ℃, and crushing to obtain phosphorus removing agent particles with the particle size of 20-200 meshes.
And step three, adding 50 parts of dephosphorizing agent particles, 6 parts of catalyst sulfuric acid, 2 parts of surfactant Tween-80, 3 parts of cross-linking agent formaldehyde and 1 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring at 1200rpm for foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for 18h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 3 hours, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 18 hours, and the phosphorus removal effect is obvious.
Example 4
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 2099 is stirred and dissolved in 1900 parts of 95 ℃ water to form a stable solution.
And step two, binding and forming the chemical phosphorus removing agent ferric chloride by using a polyvinyl alcohol aqueous solution, drying the product in an oven at 105 ℃, and crushing the product to obtain phosphorus removing agent particles with the particle size of 20-200 meshes.
And step three, adding 30 parts of phosphorus removal agent particles, 12 parts of catalyst hydrochloric acid, 5 parts of surfactant triton-100, 3 parts of cross-linking agent glutaraldehyde and 0.3 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring at a high speed of 1000rpm, foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for 24h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 4 hours, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 24 hours, and the phosphorus removal effect is obvious.
Example 5
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 2488 is stirred and dissolved in 1150 parts of 95 ℃ water to form a stable solution.
And step two, binding and forming the chemical phosphorus removing agent ferrous chloride by using a polyvinyl alcohol aqueous solution, drying the product in an oven at 105 ℃, and crushing the product to obtain phosphorus removing agent particles with the particle size of 20-200 meshes.
And step three, adding 60 parts of dephosphorizing agent particles, 8 parts of catalyst hydrochloric acid, 4 parts of surfactant dodecyl dimethyl benzyl ammonium chloride, 3 parts of cross-linking agent glutaraldehyde and 0.7 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring at a high speed of 1500rpm, foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for 12h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 2 hours, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 12 hours, and the phosphorus removal effect is obvious.
Example 6
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 117 is stirred and dissolved in 900 parts of 95 ℃ water to form a stable solution.
And step two, binding and forming the sodium aluminate serving as the chemical phosphorus removal agent by using a polyvinyl alcohol aqueous solution, drying the sodium aluminate in an oven at 105 ℃, and crushing the sodium aluminate to obtain phosphorus removal agent particles with the particle size of 20-200 meshes.
And step three, adding 40 parts of phosphorus removing agent particles, 3 parts of catalyst sulfuric acid, 4 parts of surfactant sodium dodecyl benzene sulfonate, 18 parts of cross-linking agent formaldehyde and 0.5 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring at a high speed of 1500rpm, foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for 9h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 1 hour, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 9 hours, and the phosphorus removal effect is obvious.
Example 7
The efficient phosphorus removal composite filler for sewage treatment is prepared by the embodiment, taking PVA as a main component, adding phosphorus removal agent particles of 20-200 meshes, foaming, crosslinking and curing, and the specific preparation method comprises the following steps:
step one, 100 parts of polyvinyl alcohol 124 is stirred and dissolved in 900 parts of 95 ℃ water to form a stable solution.
And step two, bonding and molding the chemical phosphorus removing agent ferric sulfate by using a polyvinyl alcohol aqueous solution, drying the product in an oven at 105 ℃, and crushing the product to obtain phosphorus removing agent particles with the particle size of 20-200 meshes.
And step three, adding 30 parts of phosphorus removal agent particles, 4 parts of catalyst sulfuric acid, 2 parts of surfactant sodium dodecyl benzene sulfonate, 9 parts of cross-linking agent formaldehyde and 1 part of sodium bicarbonate into 100 parts of polyvinyl alcohol aqueous solution, stirring and foaming at a high speed of 2000rpm for 2min, pouring into a mold, and preserving heat at 65 ℃ for 12h for curing and shaping.
And step four, demolding, cleaning, drying, and cutting into cube blocks with the side length of 2cm according to application requirements to prepare the phosphorus removal composite filler.
Testing the performance of the phosphorus removal composite filler: 10L of simulated wastewater with initial phosphorus concentration of 5mg/L is injected into a container, a phosphorus removal composite filler with the volume ratio of 20% is added, the filler is suspended in the wastewater, the phosphorus concentration of the wastewater is reduced to 1mg/L after 1 hour, the phosphorus concentration of the wastewater is reduced to below 0.5mg/L after 6 hours, and the phosphorus removal effect is obvious.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A preparation method of a high-efficiency phosphorus removal composite filler is characterized by comprising the following steps:
the method comprises the following steps:
step one, stirring and dissolving polyvinyl alcohol in water at 95 ℃ to form a stable solution;
step two, bonding and forming the chemical phosphorus removing agent by using a polyvinyl alcohol aqueous solution, drying at 105 ℃, and crushing to prepare phosphorus removing agent particles;
adding phosphorus removing agent particles, a catalyst, a surfactant, a cross-linking agent and sodium bicarbonate into a polyvinyl alcohol aqueous solution, stirring at a high speed, foaming for 2min, pouring into a mold, and preserving heat at 65 ℃ for solidification and shaping;
and step four, demolding, cleaning, drying, and cutting into blocks with corresponding sizes as required to obtain the phosphorus removal composite filler.
2. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the first step, 100 parts by weight of polyvinyl alcohol and 400-1900 parts by weight of water are added.
3. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the first step, the average polymerization degree of the polyvinyl alcohol is 300-2600, and the alcoholysis degree is 60-99.9%.
4. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the second step, the chemical phosphorus removal agent is one or more of aluminum sulfate, ferric sulfate, ferrous sulfate, ferric chloride, ferrous chloride, sodium aluminate, polyferric salt and polyaluminium salt.
5. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the third step, 100 parts of polyvinyl alcohol aqueous solution, 20-60 parts of phosphorus removing agent particles, 2-12 parts of catalyst, 1-5 parts of surfactant, 3-18 parts of cross-linking agent and 0.1-1 part of sodium bicarbonate by weight.
6. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the third step, the catalyst is one or more of hydrochloric acid, sulfuric acid, nitric acid or boric acid.
7. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the third step, the surfactant is one or more of OP-10, Tween-80, sodium dodecyl benzene sulfonate, Triton-100 and dodecyl dimethyl benzyl ammonium chloride.
8. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the third step, the cross-linking agent is formaldehyde or glutaraldehyde.
9. The preparation method of the high-efficiency phosphorus removal composite filler according to claim 1, characterized in that:
in the third step, the foaming stirring speed is 800-.
10. The high-efficiency phosphorus removal composite filler is characterized in that: the high-efficiency phosphorus removal composite filler is prepared by the preparation method of the high-efficiency phosphorus removal composite filler of any one of claims 1 to 9.
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| CN115417627A (en) * | 2022-08-15 | 2022-12-02 | 洛阳市誉龙净水材料有限公司 | Low-carbon preparation method of normal-temperature non-fired low-density phosphorus removal filler |
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| CN115417627A (en) * | 2022-08-15 | 2022-12-02 | 洛阳市誉龙净水材料有限公司 | Low-carbon preparation method of normal-temperature non-fired low-density phosphorus removal filler |
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| CN113149356B (en) | 2023-07-28 |
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