CN116059701B - Water purifying agent for sewage treatment and application thereof - Google Patents
Water purifying agent for sewage treatment and application thereof Download PDFInfo
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- CN116059701B CN116059701B CN202310203013.8A CN202310203013A CN116059701B CN 116059701 B CN116059701 B CN 116059701B CN 202310203013 A CN202310203013 A CN 202310203013A CN 116059701 B CN116059701 B CN 116059701B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—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
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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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to the technical field of wastewater treatment, in particular to a water purifying agent for wastewater treatment and application thereof. The water purifying agent for sewage treatment comprises the following raw materials in parts by weight: 8-16 parts of cationic starch flocculant, 20-40 parts of chitosan quaternary ammonium salt, 20-40 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10-20 parts of epoxy modified phenolic resin, 5-10 parts of polymeric ferric sulfate and 5-10 parts of polymeric aluminum sulfate. The water purifying agent for sewage treatment can effectively remove organic matters and inorganic matters in petrochemical wastewater, and particularly can effectively remove a small amount of substances such as emulsified oil and the like remained in the wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a water purifying agent for wastewater treatment and a preparation method and application thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
The components of the wastewater discharged by the petrochemical plant are complex, the petrochemical products are numerous, the reaction process and unit operation are complex, and the wastewater has complex and changeable properties; the waste water has high content of organic matters, especially hydrocarbons and derivatives thereof, and contains various heavy metals. In the processes of oil refining, storage and transportation, oily wastewater is usually discharged, and the oily wastewater usually contains crude oil, finished oil, lubricating oil, a small amount of organic solvent, catalyst and the like. The oil in water is often present in the wastewater in the form of oil slick, oil dispersion, oil emulsion, and oil dissolution.
The wastewater treatment methods commonly employed in the prior art for such wastewater include de-oiling, demulsifier addition, flocculant addition, sedimentation, filtration, and the like. After the steps of de-slicking and demulsification, small amounts of slick and emulsified oil, etc., remain in the wastewater, which are often difficult to remove directly by existing flocculants.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention discloses a water purifying agent for sewage treatment, and a preparation method and application thereof.
Specifically, the technical scheme of the invention is as follows:
the water purifying agent for sewage treatment comprises the following raw materials in parts by weight: 8-16 parts of cationic starch flocculant, 20-40 parts of chitosan quaternary ammonium salt, 20-40 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10-20 parts of epoxy modified phenolic resin, 5-10 parts of polymeric ferric sulfate and 5-10 parts of polymeric aluminum sulfate.
In a second aspect of the present invention, there is provided a method for preparing a water purifying agent for sewage treatment according to the first aspect, the method comprising the steps of: adding the cationic starch flocculant into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin in the raw materials into the solution, and stirring to obtain the water purifying agent for sewage treatment.
In a third aspect of the invention, there is provided the use of the water purifying agent for sewage treatment of the first aspect or the method for producing the water purifying agent for sewage treatment of the second aspect in petrochemical wastewater treatment.
The invention has the following beneficial effects:
the cationic starch flocculant adopted in the invention is a natural polymeric flocculant with excellent performance, the cluster particles are large, the cationic starch flocculant interacts with chitosan quaternary ammonium salt and dimethylaminoethyl acrylate quaternary ammonium salt to form floccules with larger volume, inorganic matters and organic matters in petrochemical wastewater can be adsorbed, particularly floating oil, emulsified oil and dispersed oil in the petrochemical wastewater can be effectively adsorbed, and the floccules with larger volume are beneficial to enhancing sedimentation velocity.
The polymeric ferric sulfate and the polymeric aluminum sulfate added in the water purifying agent cooperate with the formed flocculating body to carry out adsorption sedimentation on inorganic matters and organic matters of the wastewater, so as to enhance flocculation. Meanwhile, the epoxy modified phenolic resin added in the invention is used as a demulsifier, so that a small amount of residual emulsified oil in the wastewater can be demulsified, and the removal rate of floating oil, emulsified oil and dispersed oil in petrochemical wastewater can be further improved by matching with the formed floccules.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As discussed in the background art, the waste water discharged from petrochemical plants is complex in composition, high in organic matter content, particularly hydrocarbons and derivatives thereof, and contains various heavy metals. In the processes of oil refining, storage and transportation, oily wastewater is usually discharged, and the oily wastewater usually contains crude oil, finished oil, lubricating oil, a small amount of organic solvent, catalyst and the like. The oil in water is often present in the wastewater in the form of oil slick, oil dispersion, oil emulsion, and oil dissolution. The waste water treatment method generally adopted for petrochemical waste water in the prior art comprises the steps of oil slicking, demulsifier adding, flocculant adding, sedimentation, filtration and the like. After the steps of de-slicking and demulsification, small amounts of slick and emulsified oil, etc., remain in the wastewater, which are often difficult to remove directly by existing flocculants. In view of the above, the invention discloses a water purifying agent for sewage treatment, a preparation method and application thereof, and the water purifying agent for sewage treatment can effectively remove floating oil, emulsified oil, suspended matters and the like in the wastewater in petrochemical industry, and effectively reduce COD value, BOD value and the like of the petrochemical wastewater.
In one embodiment of the invention, a water purifying agent for sewage treatment is provided, and the raw materials comprise the following components in parts by weight: 8-16 parts of cationic starch flocculant, 20-40 parts of chitosan quaternary ammonium salt, 20-40 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10-20 parts of epoxy modified phenolic resin, 5-10 parts of polymeric ferric sulfate and 5-10 parts of polymeric aluminum sulfate.
In a specific embodiment, the raw materials of the water purifying agent for sewage treatment comprise the following components in parts by weight: 10-16 parts of cationic starch flocculant, 25-40 parts of chitosan quaternary ammonium salt, 25-40 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 12-20 parts of epoxy modified phenolic resin, 6-10 parts of polymeric ferric sulfate and 6-10 parts of polymeric aluminum sulfate.
In a specific embodiment, the raw materials of the water purifying agent for sewage treatment comprise the following components in parts by weight: 8-14 parts of cationic starch flocculant, 20-35 parts of chitosan quaternary ammonium salt, 20-35 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10-18 parts of epoxy modified phenolic resin, 5-9 parts of polymeric ferric sulfate and 5-9 parts of polymeric aluminum sulfate.
In a specific embodiment, the raw materials of the water purifying agent for sewage treatment comprise the following components in parts by weight: 10-14 parts of cationic starch flocculant, 25-35 parts of chitosan quaternary ammonium salt, 25-35 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 15-18 parts of epoxy modified phenolic resin, 6-9 parts of polymeric ferric sulfate and 6-9 parts of polymeric aluminum sulfate.
Preferably, the raw materials of the water purifying agent for sewage treatment comprise the following components in parts by weight: 12 parts of cationic starch flocculant, 30 parts of chitosan quaternary ammonium salt, 30 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 17.5 parts of epoxy modified phenolic resin, 7.5 parts of polymeric ferric sulfate and 7.5 parts of polymeric aluminum sulfate.
In a specific embodiment, the cationic starch flocculant is a starch-dimethyldiallylammonium chloride-acrylamide terpolymer.
In a specific embodiment, the raw material composition of the water purifying agent for sewage treatment further comprises 20-50 parts of water.
In a specific embodiment, the raw material composition of the water purifying agent for sewage treatment further comprises 25-50 parts of water.
In a specific embodiment, the raw material composition of the water purifying agent for sewage treatment further comprises 20-45 parts of water.
In a specific embodiment, the raw material composition of the water purifying agent for sewage treatment further comprises 25-45 parts of water.
Preferably, the raw material composition of the water purifying agent for sewage treatment further comprises 30 parts of water.
In one embodiment of the present invention, there is provided a method for preparing the above water purifying agent for sewage treatment, the method comprising the steps of: adding the cationic starch flocculant into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin in the raw materials into the solution, and stirring to obtain the water purifying agent for sewage treatment.
In one embodiment of the invention, the application of the water purifying agent for sewage treatment or the preparation method of the water purifying agent for sewage treatment in the second aspect in petrochemical wastewater treatment is provided.
The present invention will be further illustrated with reference to the following specific examples, but the present invention is not limited to the following examples. The methods are conventional methods unless otherwise specified.
Example 1, a water purifying agent for sewage treatment, which comprises the following raw materials in parts by weight: 8 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 20 parts of chitosan quaternary ammonium salt, 20 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10 parts of epoxy modified phenolic resin, 5 parts of polymeric ferric sulfate, 5 parts of polymeric aluminum sulfate and 20 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Example 2, a water purifying agent for sewage treatment, comprises the following raw materials in parts by weight: 12 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 30 parts of chitosan quaternary ammonium salt, 30 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 15 parts of epoxy modified phenolic resin, 7.5 parts of polymeric ferric sulfate, 7.5 parts of polymeric aluminum sulfate and 35 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Example 3 a water purifying agent for sewage treatment, comprising the following raw materials in parts by weight: 14 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 35 parts of chitosan quaternary ammonium salt, 35 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 17 parts of epoxy modified phenolic resin, 8 parts of polymeric ferric sulfate, 8 parts of polymeric aluminum sulfate and 40 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Example 4, a water purifying agent for sewage treatment, comprising the following raw materials in parts by weight: 16 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 40 parts of chitosan quaternary ammonium salt, 40 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 20 parts of epoxy modified phenolic resin, 10 parts of polymeric ferric sulfate, 10 parts of polymeric aluminum sulfate and 50 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Comparative example 1
A water purifying agent for sewage treatment comprises the following raw materials in parts by weight: 8 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 20 parts of chitosan quaternary ammonium salt, 20 parts of epoxy modified phenolic resin, 5 parts of polymeric ferric sulfate, 5 parts of polymeric aluminum sulfate and 20 parts of water;
adding starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin in raw materials into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Comparative example 2
A water purifying agent for sewage treatment comprises the following raw materials in parts by weight: 8 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 20 parts of chitosan quaternary ammonium salt, 20 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10 parts of epoxy modified phenolic resin, 5 parts of polymeric ferric sulfate and 20 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Comparative example 3
A water purifying agent for sewage treatment comprises the following raw materials in parts by weight: 8 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 20 parts of chitosan quaternary ammonium salt, 20 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 5 parts of polymeric ferric sulfate, 5 parts of polymeric aluminum sulfate and 20 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
Performance test:
the petrochemical wastewater 300 mL is taken, the COD value of the wastewater is 856 mg/l, the BOD value is 247 mg/l, the SS value is 522 mg/l, and the turbidity is 3800. The petrochemical wastewater is subjected to flocculation sedimentation by using the water purifying agents prepared in the examples 1-4 and the comparative examples 1-3, wherein the adding amount of the water purifying agents is as follows: the volume ratio of the water purifying agent to the petrochemical wastewater is 2:25. the measurement results are shown in Table 1. In Table 1, COD (Chemical Oxygen Demand) refers to chemical oxygen demand, BOD (Biochemical oxygen demand) refers to biochemical oxygen demand, and SS (Suspended Substance) refers to suspended matter in water.
TABLE 1
As can be seen from Table 1, the water purifying agents of examples 1 to 4 of the present invention can effectively reduce COD value, BOD value, SS value and turbidity in petrochemical wastewater. The preparation method and application of the water purifying agent for sewage treatment in comparative example 1 are the same as in example 1, except that: the raw materials of the water purifying agent for sewage treatment in comparative example 1 were less dimethylaminoethyl acrylate quaternary ammonium salt than those in example 1. The preparation method and application of the water purifying agent for sewage treatment in comparative example 2 are the same as in example 1, except that: the raw material of the water purifying agent for sewage treatment in comparative example 2 was less polyaluminum sulfate than that in example 1. The preparation method and application of the water purifying agent for sewage treatment in comparative example 3 are the same as in example 1, except that: the raw material of the water purifying agent for sewage treatment in comparative example 3 was less epoxy-modified phenolic resin than in example 1. It can be seen from Table 1 that the flocculation effect of the water purifying agents for sewage treatment of comparative examples 1 to 3 is significantly reduced as compared with example 1.
Placing 3 ml of the water purifying agents of the examples 1-4 and the comparative examples 1-3 in a container, and adding petrochemical wastewater into the container until the mixed solution reaches 100 ml, wherein the content of floating oil in the petrochemical wastewater is as follows: 300 mg/l, emulsified oil content is: 350 mg/l, dispersed oil content: 4000 mg/l. And (3) fully shaking the petrochemical wastewater added with the water purifying agent, standing for sedimentation, and taking the wastewater at a position 5 cm below a solution interface after the sedimentation is completed to determine the oil content in the wastewater.
The water purifiers of the above examples 1 to 4 and comparative examples 1 to 3 were tested, and the oil contents of the resulting wastewater are shown in table 2 below.
TABLE 2
As can be seen from Table 2, the water purifying agents of examples 1 to 4 of the present invention can effectively reduce floating oil, emulsified oil and dispersed oil in petrochemical wastewater. The water purifying agents for sewage treatment of comparative examples 1 to 3 significantly reduced the adsorption effect on the floating oil, emulsified oil and dispersed oil in petrochemical wastewater.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A water purifying agent for sewage treatment is characterized by comprising the following raw materials in parts by weight: 8 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 20 parts of chitosan quaternary ammonium salt, 20 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 10 parts of epoxy modified phenolic resin, 5 parts of polymeric ferric sulfate, 5 parts of polymeric aluminum sulfate and 20 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
2. A water purifying agent for sewage treatment is characterized by comprising the following raw materials in parts by weight: 12 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 30 parts of chitosan quaternary ammonium salt, 30 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 15 parts of epoxy modified phenolic resin, 7.5 parts of polymeric ferric sulfate, 7.5 parts of polymeric aluminum sulfate and 35 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
3. A water purifying agent for sewage treatment is characterized by comprising the following raw materials in parts by weight: 14 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 35 parts of chitosan quaternary ammonium salt, 35 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 17 parts of epoxy modified phenolic resin, 8 parts of polymeric ferric sulfate, 8 parts of polymeric aluminum sulfate and 40 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
4. A water purifying agent for sewage treatment is characterized by comprising the following raw materials in parts by weight: 16 parts of starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer, 40 parts of chitosan quaternary ammonium salt, 40 parts of dimethylaminoethyl acrylate quaternary ammonium salt, 20 parts of epoxy modified phenolic resin, 10 parts of polymeric ferric sulfate, 10 parts of polymeric aluminum sulfate and 50 parts of water;
adding the starch-dimethyl diallyl ammonium chloride-acrylamide ternary graft copolymer into water, stirring to obtain a solution, sequentially adding chitosan quaternary ammonium salt, dimethylaminoethyl acrylate quaternary ammonium salt, polymeric ferric sulfate, polymeric aluminum sulfate and epoxy modified phenolic resin into the solution, and stirring to obtain the water purifying agent for sewage treatment.
5. Use of the water purifying agent for sewage treatment according to any one of claims 1 to 4 in petrochemical wastewater treatment.
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| CN111268776A (en) * | 2018-12-04 | 2020-06-12 | 上海泽戌化学科技有限公司 | Flocculant for petrochemical wastewater treatment and preparation method thereof |
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