CN111943341B - Phosphorus removal composition and preparation method thereof, phosphorus removal product and preparation method thereof, and phosphorus removal method - Google Patents
Phosphorus removal composition and preparation method thereof, phosphorus removal product and preparation method thereof, and phosphorus removal method Download PDFInfo
- Publication number
- CN111943341B CN111943341B CN202010809226.1A CN202010809226A CN111943341B CN 111943341 B CN111943341 B CN 111943341B CN 202010809226 A CN202010809226 A CN 202010809226A CN 111943341 B CN111943341 B CN 111943341B
- Authority
- CN
- China
- Prior art keywords
- phosphorus removal
- phosphorus
- water
- agent
- dephosphorization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to the technical field of water treatment, and particularly discloses a phosphorus removal composition and a preparation method thereof, a phosphorus removal product and a preparation method thereof, and a phosphorus removal method, wherein the phosphorus removal composition is prepared from the following raw materials in parts by weight: the preparation method of the bond, the phosphorus removing agent and the water comprises the following steps: mixing the adhesive with water, dissolving and stirring, then adding the phosphorus removing agent, stirring and mixing; the dephosphorization product comprises a porous substrate and the dephosphorization composition loaded on the porous substrate, and the preparation method of the dephosphorization product comprises the following steps: soaking the porous substrate in the mixed solution of the phosphorus removal composition, and drying; the application also discloses a dephosphorization method, and the dephosphorization product is arranged in water for dephosphorization. The phosphorus removal product is used for removing phosphorus from wastewater, the phosphorus removal effect is good, the contact area of the phosphorus removal agent and water can be increased without stirring when the phosphorus removal product is used for removing phosphorus from wastewater, the phosphorus removal effect is improved, and the operation is simple and convenient.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a phosphorus removal composition and a preparation method thereof, a phosphorus removal product and a preparation method thereof, and a phosphorus removal method.
Background
Agricultural wastewater, industrial wastewater and urban wastewater all contain a large amount of phosphorus, the phosphorus is a main element causing water eutrophication, people pay more and more attention to the phosphorus removal, and the phosphorus removal of the wastewater becomes a very urgent task at present.
At present, two methods of biological phosphorus removal and chemical phosphorus removal exist in phosphorus removal, the biological phosphorus removal mainly depends on the action of microorganisms, phosphorus enters activated sludge through phosphorus adsorption of phosphorus accumulating bacteria, and phosphorus in wastewater is removed along with the discharge of the sludge, but the current biological phosphorus removal process cannot ensure that the wastewater stably reaches the requirement of the effluent standard of 0.5mg/L, and the requirement is met by adopting chemical phosphorus removal measures.
Chemical phosphorus removal is completed through a chemical precipitation process, and is implemented by adding a phosphorus removing agent (a metal salt agent) into sewage, mixing the phosphorus removing agent with soluble phosphorus (phosphate) in the sewage to form granular and insoluble precipitate which is separated out from the water, wherein the commonly used phosphorus removing agent comprises iron salt, aluminum salt and lime.
When the chemical phosphorus removal method is adopted to remove phosphorus in river water or lakes, and when the phosphorus removal agent is added, in order to ensure the contact area of the phosphorus removal agent and water to achieve the phosphorus removal effect, continuous stirring is needed to increase the contact area of the phosphorus removal agent and water, and the construction is troublesome and difficult.
Disclosure of Invention
Aiming at the problem that the construction of a phosphorus removing agent is troublesome and difficult in the prior art, the invention provides the phosphorus removing composition which has the characteristics of good phosphorus removing effect and simple and convenient operation, can be used for removing phosphorus from wastewater, and can increase the contact area of the phosphorus removing agent and water without stirring when being used for removing phosphorus from wastewater, thereby improving the phosphorus removing effect.
The second purpose of the invention is to provide a preparation method of the phosphorus removal composition, which has the characteristics of simple and convenient operation and easy realization of industrialization.
The third purpose of the invention is to provide a dephosphorization product, which can be directly applied to dephosphorization without stirring, and has large contact area between wastewater and a dephosphorization agent and good dephosphorization effect.
The fourth purpose of the invention is to provide a preparation method of a dephosphorization product, which has the characteristics of simple and convenient operation and easy realization of industrialization.
The fifth purpose of the invention is to provide a phosphorus removal method, which has the characteristics of realizing phosphorus removal without stirring, along with good phosphorus removal effect and simplicity and convenience.
In order to achieve the first object, the invention provides the following technical scheme: the phosphorus removal composition is prepared from the following raw materials in parts by weight: the additive amount of the adhesive is 2-8% of the additive amount of the water, the additive amount of the phosphorus removing agent is 10-50% of the additive amount of the water, and the phosphorus removing agent at least comprises magnesium oxide.
By adopting the technical scheme, the phosphorus removal composition is prepared from the adhesive, the phosphorus removal agent and water, when the phosphorus removal composition is used, the porous base material is directly soaked in the phosphorus removal composition, the phosphorus removal agent is loaded on the porous base material through the adhesive, so that the porous base material is directly placed in water during phosphorus removal, and when water flows through the base material, the water reacts with the phosphorus removal agent on the base material to generate a precipitate, so that phosphorus in the water is removed. The contact area of the phosphorus removing agent and water is increased without stirring, the phosphorus removing effect is good, the operation is simpler and more convenient, the practicability and the operability are strong, and the popularization significance is large. Through the control of the addition amount of the adhesive and the phosphorus removing agent, the phosphorus removing agent can be adhered to the base material more firmly, the phosphorus removing agent cannot be dispersed in water due to the action of water flow, the phosphorus removing effect is lost in the precipitated water, more phosphorus removing agents are arranged on the base material, the application time can be prolonged, meanwhile, the higher utilization rate of the phosphorus removing agent is ensured, and the waste of the phosphorus removing agent is reduced.
Further, the addition amount of the binder is 3-4% of the addition amount of water.
Furthermore, the addition amount of the phosphorus removal agent is 30-40% of the addition amount of water.
Furthermore, the phosphorus removal agent is magnesium oxide or a mixture of magnesium oxide and a calcium sulfate product in any proportion.
Further, the phosphorus removing agent is selected from the following raw materials in a mass ratio of 1: (1-7) the mixture of the calcium sulfate product and the magnesium oxide, more preferably the mixture of the calcium sulfate product and the magnesium oxide in the mass ratio of 1 (2-3).
By adopting the technical scheme, the phosphorus removing agent of the proportional system is adopted, the compound adhesive is loaded on the porous base material, the phosphorus removing effect is good, the loading effect is good, and the loss rate of the phosphorus removing agent separated from the base material and lost in water is low.
Further, the adhesive is one or more of polyvinyl alcohol and polyvinyl formal adhesive, and is more preferably polyvinyl alcohol.
By adopting the technical scheme, when the polyvinyl alcohol adhesive is selected as the adhesive for loading the phosphorus removing agent on the base material, the adhesion effect is better, and the loss rate of the phosphorus removing agent is smaller.
In order to achieve the second object, the invention provides the following technical scheme: a preparation method of a phosphorus removal composition comprises the following steps: mixing the adhesive with water, then adding the phosphorus removing agent, and stirring and mixing.
By adopting the technical scheme, the method is simple and convenient, and industrial production is easy to realize.
Further, the method comprises a ball milling step, wherein the mixture obtained after stirring and mixing is subjected to ball milling for 2-5h, the ball milling medium is 200-800 meshes, and the mass ratio of the addition amount of the ball milling medium to the addition amount of the mixed solution is 1: (1-1.5).
By adopting the technical scheme, the mixed solution obtained by mixing the adhesive, the water and the phosphorus removing agent can be uniformly ground through the ball milling step, the phosphorus removing agent can be better bonded and loaded on the base material, and the loss rate of the phosphorus removing agent is lower during phosphorus removal.
In order to achieve the third object, the invention provides the following technical solutions: a phosphorus removal product comprises a porous substrate and a phosphorus removal composition loaded on the porous substrate, wherein the phosphorus removal composition is the phosphorus removal composition.
Through adopting above-mentioned technical scheme, dephosphorization goods in this application are made by porous substrate and the dephosphorization composition of load on porous substrate, in the dephosphorization, can directly arrange dephosphorization goods in aqueous, when the water flows through, through porous substrate, the phosphate in aqueous and the dephosphorization composition reaction precipitation in the porous substrate obtain the precipitate, reach the purpose of removing phosphorus in the water, and this reaction can take place through rivers process, do not need the stirring just to increase the area of contact of dephosphorization agent and water, dephosphorization is effectual, the operation is simple and convenient more, practical operability is strong, and popularization meaning is big.
With the water flow, the phosphate continuously reacts with the dephosphorization composition on the substrate
Further, the porous substrate is made of polyurethane foam.
By adopting the technical scheme, when the polyurethane surface plastic is selected as the porous base material, more dephosphorization compositions can be loaded on the adsorption material, and the flowing water can not be influenced.
In order to achieve the fourth object, the invention provides the following technical solutions: a preparation method of a dephosphorization product comprises the following steps: the method comprises the following steps: the porous substrate is immersed in the mixed solution of the phosphorus removal composition and then dried.
By adopting the technical scheme, the preparation method is simple and convenient to operate and easy to realize industrialization.
Further, the drying temperature is 50-80 ℃, and the phosphorus removing agent is bonded on the porous base material by drying.
By adopting the technical scheme, the drying temperature is controlled so that the phosphorus removing agent can be firmly adhered to the porous base material under the action of the adhesive, and the decomposition of the adhesive caused by overhigh temperature is prevented, so that the phosphorus removing agent falls off from the porous base material.
In order to achieve the fifth object, the invention provides the following technical solutions: a dephosphorization method, wherein the dephosphorization product is arranged in water for dephosphorization.
By adopting the technical scheme, when the phosphorus is removed by the method, the operation is simple and convenient, the contact area of the phosphorus removing agent and water can be ensured without stirring, and the phosphorus removing effect is good.
In conclusion, the invention has the following beneficial effects:
1. the phosphorus removal composition is prepared from an adhesive, a phosphorus removal agent and water, when the phosphorus removal composition is used, a porous base material is directly soaked in the phosphorus removal composition, and the phosphorus removal agent is loaded on the porous base material through the adhesive, so that the porous base material is directly placed in the water during phosphorus removal, and when the water flows through the base material, the water acts with the phosphorus removal agent on the base material to generate a precipitate, so that the phosphorus in the water is removed, the contact area between the phosphorus removal agent and the water is increased without stirring, the phosphorus removal effect is good, the operation is simpler and more convenient, and the practical operability is strong;
2. through the addition control of adhesive and dephosphorization agent in this application file for the dephosphorization agent can glue more firmly on the substrate, can not make the dephosphorization agent disperse in aqueous because of the rivers effect, precipitate the aquatic, lose the dephosphorization effect, have more dephosphorization agents on the substrate moreover, can the live time be more of a specified duration, and simultaneously, still guarantee that the utilization ratio of dephosphorization agent is higher, reduce the waste of dephosphorization agent.
Detailed Description
The present invention is further described in detail with reference to the following examples, which are specifically illustrated by the following: the following examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer, and the starting materials used in the following examples are available from ordinary commercial sources unless otherwise specified.
When the phosphorus is removed by a chemical phosphorus removal method, the phosphorus removing agent is added into water and then is easy to settle, stirring is needed to ensure the contact area of the phosphorus removing agent and the water so as to achieve a good phosphorus removal effect, and especially when phosphorus is removed in places such as river water, lakes or river channels, the stirring operation is inconvenient.
In order to solve the problem, the application provides a phosphorus removal composition and a preparation method thereof, a phosphorus removal product and a preparation method thereof, and a phosphorus removal method, wherein the phosphorus removal composition is prepared from the following raw materials: the phosphorus removal agent comprises a binder, a phosphorus removal agent and water, wherein the addition amount of the binder is 2-8wt% of the addition amount of the water, the addition amount of the phosphorus removal agent is 10-50 wt% of the addition amount of the water, more preferably, the addition amount of the binder is 3-4wt% of the addition amount of the water, and the addition amount of the phosphorus removal agent is 30-40wt% of the addition amount of the water.
The phosphorus removing agent at least comprises magnesium oxide, for example, the phosphorus removing agent is magnesium oxide or the magnesium oxide is mixed with a calcium sulfate product in any proportion, preferably, the phosphorus removing agent is a mixture of the magnesium oxide and the calcium sulfate product in a mass ratio of 1: (1-7) and magnesium oxide, preferably, the phosphorus removing agent is selected from the mixture of the calcium sulfate product and the magnesium oxide with the mass ratio of 1 (2-3), more preferably, the magnesium oxide is selected from light magnesium oxide, wherein the added calcium sulfate product can be pure calcium sulfate or desulfurized gypsum or titanium gypsum, the desulfurized gypsum is used as a byproduct generated in the thermal power industry, the steel industry and the phosphate fertilizer industry, the titanium gypsum is used as a byproduct generated in the production of titanium dioxide by a sulfuric acid process, and the application of the desulfurized gypsum and the titanium phosphate gypsum can not only play a role of the phosphorus removing agent, but also realize the treatment of waste by waste.
The adhesive can be selected from adhesives commonly used in the field, preferably one or more of polyvinyl alcohol adhesive and polyvinyl formal adhesive (i.e. 107 adhesive), the polyvinyl formal adhesive can be obtained from commercial sources directly, and can also be prepared by the method in the field by using the condensation reaction principle of polyvinyl alcohol and formaldehyde under acidic conditions, and the polyvinyl formal adhesive prepared by the following method is exemplified in the document of the application:
heating 200ml of water to 60 ℃, adding 20g of PVA 1799, heating to 90-100 ℃, stirring for 20-30min to fully dissolve the PVA 1799, cooling to 50-60 ℃, adjusting the pH value of the mixed solution to 1.5-2.0, then adding 6ml of formaldehyde, reacting for 25-35min at 80-90 ℃, cooling to 50-60 ℃, adjusting the pH value of the mixed solution to 7-8, and cooling to normal temperature to obtain the polyvinyl formal adhesive.
The application also discloses a preparation method of the phosphorus removal composition, which comprises the following steps: mixing an adhesive with water, dissolving and stirring at 10-30 ℃, then adding a phosphorus removing agent, stirring and mixing to obtain a phosphorus removing composition, in order to ensure that the adhesive and the phosphorus removing agent in the phosphorus removing composition are mixed more uniformly, performing ball milling treatment on the mixture obtained after stirring and mixing to obtain a phosphorus removing mixture, wherein the ball milling treatment parameters are as follows: the ball milling time is 2-5h, the ball milling medium is ceramic balls (alumina), the grain size of the ceramic balls is 200-800 meshes, and the mass ratio of the addition amount of the ball milling medium to the addition amount of the mixed solution is 1: (1-1.5).
The application also discloses a dephosphorization product obtained based on the dephosphorization composition, the dephosphorization product comprises a porous substrate and the dephosphorization composition loaded on the porous substrate, and the preparation method comprises the following steps: the porous substrate is immersed in the mixed liquor of the phosphorus removal composition and then dried to adhere the phosphorus removal composition to the porous substrate. In the application, the phosphorus removing agent is loaded on the porous base material through the adhesive, when the porous base material is placed in water to be treated, when water flows through the porous base material, phosphate in the water and the phosphorus removing agent on the porous base material are chemically reacted to form precipitates, and the phosphorus removing operation is realized. It can be seen that the porous substrate in this document, which is preferably a flexible polyurethane foam in this document, uses a porous structure to achieve the loading of the phosphorus removal composition and allows water to flow through. Considering that if the drying temperature is too high, the organic binder is decomposed, thereby reducing the adhesion of the phosphorus removal agent on the porous substrate, the drying parameters in the present document are preferably: the drying temperature is 50-80 ℃.
The application document also discloses a phosphorus removal method using the obtained phosphorus removal product, which comprises the following steps: the obtained dephosphorization product is directly arranged in water for dephosphorization, so that flowing water directly passes through the porous base material loaded with the dephosphorization composition when passing through, phosphate in the water reacts with the dephosphorization agent on the porous base material to generate precipitate for dephosphorization, the contact area of the dephosphorization agent and the water can be increased without stirring, the dephosphorization agent has good dephosphorization effect, and the problem of difficult stirring operation is greatly solved when the dephosphorization agent is particularly applied to the river water or the lake or the river channel.
Specifically, the following are provided: although the sediment obtained after the reaction between the phosphate in the water and the phosphorus removal agent in the porous base material is deposited on the porous base material, under the action of the water flow, part of the sediment deposited on the porous base material can be washed away, so that the water flow can still flow through the porous base material for phosphorus removal, and the problem of short phosphorus removal action time caused by the blockage of the sediment on the porous base material can be solved. When the dephosphorization product is used for a period of time, the dephosphorization effect is found to be weaker, at this time, the dephosphorization agent loaded on the porous substrate is reacted, so that the dephosphorization effect is reduced, or the porous substrate is blocked by the precipitate, or the dephosphorization agent is covered by the precipitate, so that the dephosphorization effect is weak. At the moment, the phosphorus removal product can be taken out and directly replaced, or the taken out porous base material can be directly soaked in the phosphorus removal composition again to load the phosphorus removal agent, although the porosity of the porous base material is reduced by the latter treatment method, the phosphorus removal composition is loaded on the precipitate again, and water can still be subjected to phosphorus removal reaction, so that the phosphorus removal product is replaced after the circulation for a plurality of times, and the reuse of the porous base material can be realized, and the generation of waste is reduced.
In the application, the phosphorus removing agent can be more firmly adhered to the porous substrate by controlling the proportion between the adhesive and the phosphorus removing agent and the selection of the adhesive and the phosphorus removing agent, the phosphorus removing agent cannot fall off due to the action of water flow, the phosphorus removing effect is achieved, the higher utilization rate of the phosphorus removing agent can be ensured, and the waste of the phosphorus removing agent is reduced.
The following preparation examples 1 to 3 are preparation examples of polyvinyl formal adhesives
Preparation example 1
A preparation method of polyvinyl formal adhesive comprises the following steps:
heating 200ml of water to 60 ℃, adding 20g of PVA 1799, heating to 95 ℃, stirring for 25min to fully dissolve the PVA 1799, cooling to 55 ℃, adjusting the pH value of the mixed solution to be 1.5, then adding 6ml of formaldehyde, reacting for 30min at 85 ℃, cooling to 55 ℃, adjusting the pH value of the mixed solution to be 7, and cooling to normal temperature to obtain the polyvinyl formal adhesive (107 adhesive).
Preparation example 2
Heating 200ml of water to 60 ℃, adding 20g of PVA 1799, heating to 90 ℃, stirring for 30min to fully dissolve the PVA 1799, cooling to 50 ℃, adjusting the pH value of the mixed solution to be 1.5, then adding 6ml of formaldehyde, reacting for 35min at 80 ℃, cooling to 50 ℃, adjusting the pH value of the mixed solution to be 7, and cooling to normal temperature to obtain the polyvinyl formal adhesive (107 adhesive).
Preparation example 3
Heating 200ml of water to 60 ℃, adding 20g of PVA 1799, heating to 100 ℃, stirring for 20min to fully dissolve the PVA 1799, cooling to 60 ℃, adjusting the pH value of the mixed solution to be 2.0, then adding 6ml of formaldehyde, reacting for 25min at 90 ℃, cooling to 60 ℃, adjusting the pH value of the mixed solution to be 8, and cooling to normal temperature to obtain the polyvinyl formal adhesive (107 adhesive).
Example 1
A preparation method of a dephosphorization product comprises the following steps:
preparation of the phosphorus removal composition: mixing a binding agent with water, dissolving and stirring at 20 ℃, then adding a phosphorus removal agent, stirring and mixing to obtain a mixture, wherein the addition amount of the water is 100g, the addition amount of the binding agent is 4wt% of that of the water, the addition amount of the phosphorus removal agent is 30wt% of that of the water, the binding agent is polyvinyl alcohol, the phosphorus removal agent is magnesium oxide and calcium sulfate with the mass ratio of 2;
performing ball milling treatment on the obtained mixture, wherein the ball milling parameters are as follows: the ball milling time is 3h, the ball milling medium is ceramic balls (alumina), and the mass ratio of the addition amount of the ball milling medium to the addition amount of the mixed solution is 1:1.3;
preparation of a phosphorus removal product: the flexible polyurethane foam plastic is soaked in the dephosphorization composition, is fully soaked and absorbed, and is dried at the drying temperature of 75 ℃.
Example 2
A method for preparing a phosphorus removal product, which is carried out according to the method in the embodiment 1, and is characterized in that,
preparation of the phosphorus removal composition: mixing a binder and water, dissolving and stirring at 10 ℃, then adding a phosphorus removal agent, stirring and mixing to obtain a mixture, wherein the addition amount of the binder is 2wt% of the addition amount of the water, the addition amount of the phosphorus removal agent is 10wt% of the addition amount of the water, the binder is the polyvinyl formal adhesive obtained in preparation example 1, and the phosphorus removal agent is magnesium oxide;
performing ball milling treatment on the obtained mixture, wherein the ball milling parameters are as follows: the ball milling time is 2h, the ball milling medium is ceramic balls (alumina), and the mass ratio of the addition amount of the ball milling medium to the addition amount of the mixed solution is 1:1;
preparation of a dephosphorization product: the soft polyurethane foam plastic is soaked in the dephosphorization composition, is fully soaked and absorbed, and is dried at the drying temperature of 50 ℃.
Example 3
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, with the difference that,
preparation of the phosphorus removal composition: mixing a binder and water, dissolving and stirring at 30 ℃, then adding a phosphorus removal agent, stirring and mixing to obtain a mixture, wherein the addition amount of the binder is 8wt% of the addition amount of the water, the addition amount of the phosphorus removal agent is 50wt% of the addition amount of the water, and the binder is polyvinyl alcohol with the mass ratio of 1;
performing ball milling treatment on the obtained mixture, wherein the ball milling parameters are as follows: the ball milling time is 5h, the ball milling medium is ceramic balls (alumina), and the mass ratio of the addition amount of the ball milling medium to the addition amount of the mixed solution is 1:1.5;
preparation of a dephosphorization product: the flexible polyurethane foam plastic is soaked in the dephosphorization composition, is fully soaked and absorbed, and is dried at the drying temperature of 80 ℃.
Example 4
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, with the difference that,
in the preparation of the phosphorus removal composition, the addition amount of the binder is 3wt% of the addition amount of water, the addition amount of the phosphorus removal agent is 30wt% of the addition amount of water, the binder is polyvinyl alcohol and polyvinyl formal adhesive with the mass ratio of 1.
Example 5
A method for preparing a phosphorus removal product, which is carried out according to the method in the embodiment 1, and is characterized in that,
in the preparation of the phosphorus removal composition, the addition amount of the binder is 4wt% of the addition amount of water, the addition amount of the phosphorus removal agent is 40wt% of the addition amount of water, the binder is polyvinyl alcohol and polyvinyl formal adhesive with the mass ratio of 1.
Examples 6 to 9
A method of making a phosphorus removal product was performed as in example 1, except that the binder was added in the amount shown in table 1 below.
Table 1:
| example 6 | Example 7 | Example 8 | Example 9 | |
| Amount of adhesive added | The addition amount of water is 2wt% | The addition amount of water is 3wt% | The addition amount of water is 5wt% | The addition amount of water is 8wt% |
Examples 10 to 13
A preparation method of a phosphorus removal product, which is carried out according to the method in example 1, except that the addition amount of the phosphorus removal agent is added according to the following table 2.
Table 2:
| item | Example 10 | Example 11 | Example 12 | Example 13 |
| Addition amount of phosphorus removal agent | The addition amount of water is 10wt% | The addition amount of water is 20wt% | The addition amount of water is 40wt% | The water is added in an amount of 50wt% |
Examples 14 to 18
A method of preparing a phosphorus removal product, conducted as in example 1, except that the phosphorus removal agent includes magnesium oxide and calcium sulfate in the following ratio, for example, as shown in table 3:
table 3:
| item | Example 14 | Example 15 | Example 16 | Example 17 | Example 18 |
| Phosphorus removing agent | Magnesium oxide: calcium sulfate =7 | Magnesium oxide: calcium sulfate =1.76 | Magnesium oxide: calcium sulfate =5 | Magnesium oxide: calcium sulfate =3 | Magnesium oxide: calcium sulfate =13.2 |
Example 19
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, and the difference is that the magnesium oxide is heavy magnesium oxide.
Example 20
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, and the difference is that the polyvinyl formal adhesive prepared in the preparation example 1 is used as a binder.
Example 21
A preparation method of a dephosphorization product is carried out according to the method in the example 1, and the difference is that the dephosphorization agent comprises titanium gypsum and magnesium oxide with the mass ratio of 1.
Example 22
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, and the difference is that the dephosphorization agent comprises desulfurized gypsum and magnesium oxide with the mass ratio of 1.
Example 23
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, and the difference is that magnesium oxide is selected as the dephosphorization agent.
Example 24
A method for preparing a phosphorus removal product, which is carried out according to the method in the embodiment 1, and is characterized in that,
preparation of the phosphorus removal composition: mixing a binder and water, dissolving and stirring at 20 ℃, then adding a phosphorus removal agent, stirring and mixing to obtain a mixture as a phosphorus removal composition, wherein the addition amount of the binder is 4wt% of the addition amount of the water, the addition amount of the phosphorus removal agent is 30wt% of the addition amount of the water, the binder is the polyvinyl formal adhesive obtained in preparation example 1, the phosphorus removal agent is magnesium oxide and calcium sulfate with the mass ratio of 2;
preparation of a phosphorus removal product: the flexible polyurethane foam plastic is soaked in the dephosphorization composition, is fully soaked and absorbed, and is dried at the drying temperature of 75 ℃.
Comparative example
Comparative example 1
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, and the difference is that a dephosphorization agent is calcium sulfate.
Comparative example 2
A phosphorus removal product was prepared as in example 1, except that the binder was added in an amount of 10wt% of the water.
Comparative example 3
A preparation method of a dephosphorization product is carried out according to the method in the embodiment 1, with the difference that,
the addition amount of the phosphorus removing agent is 70wt%.
Performance detection
Preparing a phosphorus-containing solution with the phosphorus content of 20ppm, applying the phosphorus removal product prepared in the above examples and comparative examples to the phosphorus-containing solution with the phosphorus content of 20ppm for phosphorus removal test, firstly, placing the obtained phosphorus removal product in the phosphorus-containing solution, respectively performing oscillation adsorption and static adsorption, then measuring the phosphorus content of the phosphorus-containing solution after adsorption, wherein the oscillation adsorption is performed by oscillating for 20min and then standing for 1 day for adsorption, the static adsorption time is 2 days, and the phosphorus content measurement results are shown in the following table 4.
Table 4:
| detecting items | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 |
| Oscillatory adsorption | 0.0986 | 0.3874 | 0.4012 | 0.5746 | 0.4961 | 0.1085 | 0.1004 | 0.3426 |
| Static adsorption | 0.0845 | 0.3065 | 0.3579 | 0.4826 | 0.4158 | 0.0166 | 0.0974 | 0.0372 |
| Detecting items | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 | Example 15 | Example 16 |
| Oscillating adsorption | 0.2964 | 0.4758 | 0.3077 | 0.2311 | 0.2500 | 0.1160 | 0.1712 | 0.1770 |
| Static adsorption | 0.0280 | 0.3102 | 0.0586 | 0.0198 | 0.0315 | 0.2146 | 0.1217 | 0.2317 |
| Detecting items | Example 17 | Example 18 | Example 19 | Example 20 | Example 21 | Example 22 | Example 23 | Example 24 |
| Oscillating adsorption | 0.1370 | 0.5373 | 0.4502 | 0.4361 | 0.1025 | 0.1013 | 0.1358 | 0.7173 |
| Static adsorption | 0.1191 | 0.4296 | 0.4216 | 0.3541 | 0.1012 | 0.1054 | 0.1125 | 0.6871 |
TABLE 4:
| detecting items | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Oscillating adsorption | 8.786 | 1.6413 | 0.8578 |
| Static adsorption | 9.387 | 1.6974 | 1.8463 |
As can be seen from the above table 4, the phosphorus removal product prepared by the method is applied to water phosphorus removal, the phosphorus removal effect is good, the phosphorus removal rate reaches more than 95% after static adsorption for 2 days, in addition, the oscillation adsorption operation is firstly oscillated for 20min, so that the adhesion capability of the phosphorus removal agent on the porous substrate can be inspected, then the sediment in water is detected, at the moment, the sediment in water is calcium phosphate and magnesium phosphate sediment, only a small amount of calcium sulfate and magnesium oxide sediment exists, the phosphorus removal rate of the phosphorus removal agent is low, then static adsorption is carried out for one day, the phosphorus removal effect of the phosphorus removal agent adhered on the porous substrate is inspected, and the phosphorus removal effect is good.
In addition, referring to the test results of example 1, examples 6 to 9 and comparative example 2, it can be seen that as the content of the binder increases, the phosphorus removal rate increases first and then decreases, and when the addition amount of the binder is 3 to 4wt% of the addition amount of water, the phosphorus removal rate is good, and when the addition amount of the binder is too large, the phosphorus removal effect decreases by wrapping more phosphorus removal agent, and referring to the test results of example 1 and example 20, it can be seen that when the binder is polyvinyl alcohol, the phosphorus removal effect is better than that of polyvinyl formal binder, probably because the binding force of polyvinyl formal binder is stronger, when the phosphorus removal agent is wrapped, the phosphorus removal agent needs to take more time to be exposed to react with phosphate.
Referring to the detection results of example 1, example 23 and comparative example 1, when the phosphorus removing agent is formed by compounding magnesium oxide and calcium sulfate, the phosphorus removing effect is optimal, and when the phosphorus removing agent is formed by magnesium oxide, the phosphorus removing effect is better, but when the phosphorus removing agent is formed by calcium sulfate, the phosphorus removing effect is poorer, and only the removal rate of about 50% can be achieved.
Referring to the detection results of example 1, examples 10 to 13 and comparative example 3, it can be seen that as the content of the phosphorus removing agent increases, the phosphorus removing rate increases and then decreases slightly, especially the phosphorus removing effect decreases more during static adsorption, probably because when the content of the phosphorus removing agent is too much, the adhesion between part of the phosphorus removing agent and the porous substrate is weak, part of the phosphorus removing agent falls off in water, precipitates at the bottom, the contact area with water is reduced, and the phosphorus removing effect decreases. When the addition amount of the phosphorus removing agent is 30-40wt%, the phosphorus removing effect is better.
Referring to the test results of example 1 and examples 14-18, it can be seen that the phosphorus removal rate of the phosphorus removal agent is increased and then slightly decreased with the increase of the ratio of magnesium oxide, and the ratio of magnesium oxide to calcium sulfate is (2-3): 1, the dephosphorization effect is better. Referring to example 1 and example 19, it can be seen that the magnesium oxide has better phosphorus removal effect when light magnesium oxide is used. Referring to the test results of examples 21 and 22, it can be seen that when the calcium sulfate in the phosphorus removing agent is added in the form of titanium gypsum and desulfurized gypsum, the phosphorus removing effect is slightly different. Referring again to the test results of example 23, it can be seen that the phosphorus removal effect is slightly reduced when the phosphorus removal composition is not ball milled.
Application example
The polyurethane foam plastic loaded with the phosphorus removal composition prepared in the example 1 is prepared into an adsorption column, then the tidal white river water is added with disodium hydrogen phosphate to prepare river water with high phosphorus content, the river water flows through the foam plastic adsorption column loaded with the phosphorus removal agent, the phosphorus content in the phosphorus-containing river water before passing through the adsorption column is determined to be 26.48mg/L, and the phosphorus content in the river water after passing through the adsorption column is determined to be 0.6495 mg/L.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (4)
1. A preparation method of a dephosphorization product is characterized by comprising the following steps:
s1, mixing an adhesive with water, dissolving and stirring at 10-30 ℃, then adding a phosphorus removal agent, stirring and mixing, and carrying out ball milling treatment on the obtained mixture to obtain a phosphorus removal mixture;
the addition amount of the adhesive is 2-8% of the addition amount of water, and the addition amount of the phosphorus removal agent is 10-50% of the addition amount of water; the phosphorus removing agent at least comprises magnesium oxide, and the adhesive is one or more of polyvinyl alcohol and polyvinyl formal adhesive;
the ball milling processing parameters are as follows: the ball milling time is 2-5h, the ball milling medium is 200-800 meshes, and the mass ratio of the addition amount of the ball milling medium to the addition amount of the mixed solution is 1 (1-1.5);
s2, the polyurethane foam plastic is soaked in the mixed solution of the dephosphorization mixture and then dried at the temperature of 50-80 ℃ so that the dephosphorization mixture is adhered to the polyurethane foam plastic.
2. The method for preparing a phosphorus removal product of claim 1, wherein the binder is added in an amount of 3-4% of the amount of water; the addition amount of the phosphorus removing agent is 30-40% of the addition amount of water;
the phosphorus removing agent is selected from magnesium oxide or a mixture of magnesium oxide and a calcium sulfate product in any proportion.
3. The preparation method of a phosphorus removal product as claimed in claim 1, wherein the phosphorus removal agent is a mixture of a calcium sulfate product and magnesium oxide in a mass ratio of 1 (1-7).
4. A phosphorus removal method is characterized in that a phosphorus removal product obtained by the preparation method of claim 1 is directly arranged in water, running water passes through the porous phosphorus removal product, and phosphate in the water reacts with a phosphorus removal agent on the phosphorus removal product to generate a precipitate for removing phosphorus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010809226.1A CN111943341B (en) | 2020-08-12 | 2020-08-12 | Phosphorus removal composition and preparation method thereof, phosphorus removal product and preparation method thereof, and phosphorus removal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010809226.1A CN111943341B (en) | 2020-08-12 | 2020-08-12 | Phosphorus removal composition and preparation method thereof, phosphorus removal product and preparation method thereof, and phosphorus removal method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111943341A CN111943341A (en) | 2020-11-17 |
| CN111943341B true CN111943341B (en) | 2023-01-10 |
Family
ID=73333253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010809226.1A Active CN111943341B (en) | 2020-08-12 | 2020-08-12 | Phosphorus removal composition and preparation method thereof, phosphorus removal product and preparation method thereof, and phosphorus removal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111943341B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011375B (en) * | 2021-11-09 | 2022-12-20 | 河南省科学院化学研究所有限公司 | Preparation of granular phosphorus removing agent by titanium gypsum resource utilization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693185A (en) * | 2009-10-16 | 2010-04-14 | 东南大学 | Industrial salty slurry base composite dephosphorization material and preparation method thereof |
| JP2012254408A (en) * | 2011-06-09 | 2012-12-27 | Omuta Denshi Kogyo Kk | Production of scavenger of phosphorus in wastewater, and method for treating phosphorus-containing wastewater |
| CN104971687A (en) * | 2015-07-20 | 2015-10-14 | 北京宝鸿锐科环境科技有限公司 | Efficient compound iron-based phosphorous-removing adsorbent as well as preparation method, application method and regeneration method thereof |
| CN106083180A (en) * | 2016-06-23 | 2016-11-09 | 安徽美自然环境科技有限公司 | The preparation method of a kind of dephosphorization filler and be filled with the dephosphorization equipment of this filler |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005046731A (en) * | 2003-07-29 | 2005-02-24 | Green Japan:Kk | Phosphorus adsorbent |
| CN106186250B (en) * | 2016-07-12 | 2020-04-24 | 晓清环保科技股份有限公司 | Phosphorus removal material and preparation method thereof |
| CN106219692B (en) * | 2016-08-26 | 2022-10-21 | 上海润溪环保科技有限公司 | Tourmaline used as water body dephosphorization filter material and preparation method thereof |
-
2020
- 2020-08-12 CN CN202010809226.1A patent/CN111943341B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693185A (en) * | 2009-10-16 | 2010-04-14 | 东南大学 | Industrial salty slurry base composite dephosphorization material and preparation method thereof |
| JP2012254408A (en) * | 2011-06-09 | 2012-12-27 | Omuta Denshi Kogyo Kk | Production of scavenger of phosphorus in wastewater, and method for treating phosphorus-containing wastewater |
| CN104971687A (en) * | 2015-07-20 | 2015-10-14 | 北京宝鸿锐科环境科技有限公司 | Efficient compound iron-based phosphorous-removing adsorbent as well as preparation method, application method and regeneration method thereof |
| CN106083180A (en) * | 2016-06-23 | 2016-11-09 | 安徽美自然环境科技有限公司 | The preparation method of a kind of dephosphorization filler and be filled with the dephosphorization equipment of this filler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111943341A (en) | 2020-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5098567A (en) | Waste water treating process | |
| US4917802A (en) | Method for treating waste water | |
| CN101003390A (en) | Method for preparing flocculant of ferric chloride of polysilicon acid | |
| CN109607943B (en) | Sewage treatment method for composite treatment of high-phosphorus wastewater and high-ammonia-nitrogen wastewater | |
| CN111943341B (en) | Phosphorus removal composition and preparation method thereof, phosphorus removal product and preparation method thereof, and phosphorus removal method | |
| CN106746483A (en) | The agent of compound type sludge decrement, preparation method and applications | |
| CN104828924A (en) | Composite dephosphorizing agent for treating phosphorus-containing wastewater and application method thereof | |
| ZA200801824B (en) | Porous media for autotrophic denitrification using sulfur | |
| Chen et al. | Recent developments in anammox-based membrane bioreactors: A review | |
| CN111977833A (en) | Aluminum oxidation wastewater treatment method and method for preparing iron phosphate by using wastewater | |
| CN102774978A (en) | Treatment method for waste water with high content of nitrogen and phosphorus | |
| CN108328677B (en) | Multifunctional environment-friendly composite material and preparation method and application thereof | |
| US4125466A (en) | Treatment of sludge comprising biological aggregate | |
| CN112661234A (en) | Efficient phosphorus removal agent for sewage treatment and preparation method thereof | |
| KR100342171B1 (en) | Composition of chemicals for simultaneous removing nitrogen and phosphorus in wastewater and method for treating wastewater using the same | |
| CN113087038A (en) | Ammonia nitrogen remover for sewage treatment | |
| CN108439646A (en) | A kind of preprocess method of organic wastewater with high concentration during sulfhydryl heterocycle class production of chemicals | |
| Zhang et al. | Sustainable treatment of antibiotic wastewater using combined process of microelectrolysis and struvite crystallization | |
| TWI424968B (en) | Process and treatment device containing organic sulfur compound water | |
| KR20140128717A (en) | Waste water treatment agent for phosphorus removal andpreparation method thereof | |
| JP4153267B2 (en) | Dephosphorization / ammonia removal method, ammonia fertilizer production method, and melt solidification method | |
| CN113087289B (en) | Treatment method of circuit board development wastewater | |
| KR101269140B1 (en) | Manufacturing method of Phosphorus Absorbent with Hydroxide | |
| KR100996283B1 (en) | A porous sulfur-calcium carbonate foam including polymer and method for eliminating nitrate through sulfur-oxidation denitrification using the same | |
| CN110642461B (en) | Alkali-activated leather-immobilized bacillus pumilus/H2O2Method for purifying printing and dyeing wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |