CN112408752A - Sludge conditioner for sewage treatment and preparation method thereof - Google Patents
Sludge conditioner for sewage treatment and preparation method thereof Download PDFInfo
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- CN112408752A CN112408752A CN202011305244.2A CN202011305244A CN112408752A CN 112408752 A CN112408752 A CN 112408752A CN 202011305244 A CN202011305244 A CN 202011305244A CN 112408752 A CN112408752 A CN 112408752A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
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- Environmental & Geological Engineering (AREA)
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- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
The invention provides a sludge conditioner for sewage treatment and a preparation method thereof, and relates to the technical field of sewage treatment. The sludge conditioner for sewage treatment comprises the following raw materials in parts by weight: 45 parts of modified polyacrylamide, 15 parts of zeolite powder, 10 parts of magnesium hydroxide, 14 parts of anhydrous trisodium phosphate, 7.5 parts of calcium carbonate, 16 parts of chitosan and 3 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 70% of polyacrylamide body, 10% of nano-silver, 10% of surfactant and 10% of antioxidant. According to the invention, the conditioner is used for treating the sewage, the ammonia nitrogen content in the sewage is obviously reduced, the inhibition effect of the sewage on the microbial activity is greatly reduced, the degradation efficiency of organic pollutants is favorably improved, and meanwhile, the formed filter cake contains ammonia nitrogen precipitate substances, so that the filter cake has an obvious promotion effect on the growth of plants, and can be widely applied to the field of agricultural planting.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sludge conditioner for sewage treatment and a preparation method thereof.
Background
Sewage treatment is a process of purifying sewage to meet the requirement of discharging the sewage into a certain water body or reusing the sewage, and the sewage treatment is widely applied to various fields of buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly paid attention to by people in daily life.
Patent publication No. CN101985386B, entitled conditioner for dewatering domestic sludge, the formula of the conditioner comprises: polyacrylamide accounting for 0.3-0.9% of the dry weight of sludge to be treated, bamboo charcoal accounting for 5-20% of the dry weight of the sludge to be treated, quaternary ammonium salt accounting for 0.2-1% of the dry weight of the sludge to be treated, quicklime accounting for 2-5% of the dry weight of the sludge to be treated and polyaluminium sulfate accounting for 5-20% of the dry weight of the sludge to be treated, the conditioner has the advantages of short conditioning reaction time, high sludge settling speed, good dehydration effect, environmental protection, no pollution and the like, but the conditioner has poor conditioning effect on ammonia nitrogen wastewater in the using process, the activity of the high-concentration ammonia nitrogen wastewater on microorganisms is inhibited, the treatment application and the effect of a biochemical method on the conditioner are restricted, the degradation efficiency of the biochemical system on organic pollutants is reduced, the treated sewage is difficult to meet the requirements, and simultaneously, the water content of filter cakes obtained after the treatment of the conditioner is still, there are certain limitations.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a sludge conditioner for sewage treatment and a preparation method thereof, and solves the problems that the conditioner in the prior art has poor conditioning effect on ammonia nitrogen wastewater and the water content of a filter cake obtained after the conditioner is treated is still high.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a sludge conditioner for sewage treatment comprises the following raw materials in parts by weight: 40-50 parts of modified polyacrylamide, 10-20 parts of zeolite powder, 5-15 parts of magnesium hydroxide, 10-18 parts of anhydrous trisodium phosphate, 5-10 parts of calcium carbonate, 12-20 parts of chitosan and 2-4 parts of tackifier;
the modified polyacrylamide comprises the following raw materials in percentage by mass: 70-90% of polyacrylamide body, 10-20% of nano silver, 5-10% of surfactant and 5-10% of antioxidant.
Polyacrylamide has a flocculation effect, nano silver ions have a sterilization effect, in the water treatment process, sludge contains a large amount of bacteria, the self-purification effect of water is hindered, flocculate generated by polyacrylamide cannot treat the harmful bacteria, the harmful bacteria in the sludge are killed by the introduced nano silver ions, chitosan contributes to forming good activated sludge micelles in wastewater, and the anhydrous trisodium phosphate has the effects of softening water, removing scale, purifying and the like.
Preferably, the sludge conditioner comprises the following raw materials in parts by weight: 40 parts of modified polyacrylamide, 10 parts of zeolite powder, 5 parts of magnesium hydroxide, 10 parts of anhydrous trisodium phosphate, 5 parts of calcium carbonate, 12 parts of chitosan and 2 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 80% of polyacrylamide body, 10% of nano-silver, 5% of surfactant and 5% of antioxidant.
Preferably, the sludge conditioner comprises the following raw materials in parts by weight: 45 parts of modified polyacrylamide, 15 parts of zeolite powder, 10 parts of magnesium hydroxide, 14 parts of anhydrous trisodium phosphate, 7.5 parts of calcium carbonate, 16 parts of chitosan and 3 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 70% of polyacrylamide body, 10% of nano-silver, 10% of surfactant and 10% of antioxidant.
Preferably, the sludge conditioner comprises the following raw materials in parts by weight: 50 parts of modified polyacrylamide, 20 parts of zeolite powder, 15 parts of magnesium hydroxide, 18 parts of anhydrous trisodium phosphate, 10 parts of calcium carbonate, 20 parts of chitosan and 4 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 75% of polyacrylamide body, 10% of nano-silver, 7.5% of surfactant and 7.5% of antioxidant.
Preferably, the surfactant is one or more of fatty alcohol polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate and heavy alkylbenzene sulfonate, and the antioxidant is one or more of 2, 6-tertiary butyl-4-methylphenol, thiodipropionic acid diester and phosphite ester.
The surfactant and the antioxidant have large production amount and low use cost, so that the surface tension of the raw materials in water is remarkably reduced, and the raw materials are not easily oxidized in the ordinary storage process.
A preparation method of a sludge conditioner for sewage treatment comprises the following steps:
s1, preparing the modified polyacrylamide in the following specific mode:
1) taking a polyacrylamide body, adding clear water to prepare an acrylamide aqueous solution with the mass concentration of 20-40%, adding a nano-silver aqueous solution according to a set mass fraction, adjusting the pH value of the solution to 6-7 by using a sodium hydroxide solution with the mass concentration of 10-30%, and adding a surfactant according to a set mass fraction;
2) stirring the solution in a sealed container, introducing nitrogen or carbon dioxide, controlling the temperature in the container to be 10-30 ℃, stirring for 20-40min, performing ultraviolet irradiation for polymerization reaction, and obtaining polyacrylamide nano-silver emulsion after the reaction is finished;
3) adding an antioxidant into the emulsion according to a set mass fraction, simultaneously adding acid as a catalyst, controlling the temperature to be 30-60 ℃, reacting for 10-20h, and finally neutralizing the added acid by using a sodium hydroxide solution with the mass concentration of 10-30% to prepare a modified polyacrylamide emulsion;
4) concentrating and dehydrating the modified polyacrylamide emulsion, drying in a vacuum environment, drying, cooling and crushing to obtain powdery modified polyacrylamide;
s2, mixing the prepared modified polyacrylamide with zeolite powder, magnesium hydroxide, anhydrous trisodium phosphate, calcium carbonate and chitosan, fully stirring for 5-10min, adding the tackifier, and continuously stirring for 5-15 min;
and S3, granulating the mixture by using a granulator, drying the prepared granules at the temperature of 40-50 ℃, and drying to obtain the sludge conditioner.
On one hand, the raw material has good subsequent use effect in an alkaline environment, and nitrogen or carbon dioxide is introduced to protect the raw material in the processing process, so that oxygen is prevented from entering to influence the modification of polyacrylamide; secondly, the full stirring ensures that the components of the raw materials are more uniform.
Preferably, the preparation method of the anhydrous trisodium phosphate comprises the following steps:
1) adding trisodium phosphate dodecahydrate crystal into a dissolving container, simultaneously adding 10-15% by volume of water into the container, heating the interior of the container to 85-95 ℃, stirring for dissolving, and purifying the solution;
2) pumping the solution into a metering container, atomizing by a spraying device, and performing spray drying at the atomizing steam pressure of 0.15-0.3Mpa, the inlet temperature of 650-.
The anhydrous trisodium phosphate prepared by the method has high purity, and the introduction of impurities is avoided.
Preferably, the particle size of the sludge conditioner is 100-200 meshes.
(III) advantageous effects
The invention provides a sludge conditioner for sewage treatment and a preparation method thereof. The method has the following beneficial effects:
1. according to the invention, the conditioner is used for treating the sewage, the ammonia nitrogen content in the sewage is obviously reduced, the inhibition effect of the sewage on the microbial activity is greatly reduced, the degradation efficiency of organic pollutants is favorably improved, and meanwhile, the formed filter cake contains ammonia nitrogen precipitate substances, so that the filter cake has an obvious promotion effect on the growth of plants, and can be widely applied to the field of agricultural planting.
2. According to the invention, the polyacrylamide is modified, so that the flocculation capacity of the conditioner is improved, the treatment of substances difficult to degrade is facilitated, the wastewater can be effectively sterilized through the nano-silver technology, and the growth mechanism of microorganisms in the wastewater can be adjusted.
Polyacrylamide has a flocculation effect, nano silver ions have a sterilization effect, harmful bacteria in sludge are killed by the introduced nano silver ions, so that the polyacrylamide is matched with chitosan and the like to help to form good activated sludge zoogloea in wastewater, and the anhydrous trisodium phosphate has the effects of softening water, removing scale, purifying and the like, so that the obstruction of the harmful bacteria to the quality of water treated by the polyacrylamide is avoided on the original basis, and the flocculation effect of the polyacrylamide is improved.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a sludge conditioner for sewage treatment, which comprises the following raw materials in parts by weight: 40 parts of modified polyacrylamide, 10 parts of zeolite powder, 5 parts of magnesium hydroxide, 10 parts of anhydrous trisodium phosphate, 5 parts of calcium carbonate, 12 parts of chitosan and 2 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 80% of polyacrylamide body, 10% of nano-silver, 5% of surfactant and 5% of antioxidant.
Wherein the surfactant is one or more of fatty alcohol polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate and heavy alkylbenzene sulfonate, and the antioxidant is one or more of 2, 6-tertiary butyl-4-methylphenol, thiodipropionic acid diester and phosphite ester.
A preparation method of a sludge conditioner for sewage treatment comprises the following steps:
s1, preparing the modified polyacrylamide in the following specific mode:
1) taking a polyacrylamide body, adding clear water to prepare an acrylamide aqueous solution with the mass concentration of 20-40%, adding a nano-silver aqueous solution according to a set mass fraction, adjusting the pH value of the solution to 6-7 by using a sodium hydroxide solution with the mass concentration of 10-30%, and adding a surfactant according to a set mass fraction;
2) stirring the solution in a sealed container, introducing nitrogen or carbon dioxide, controlling the temperature in the container to be 10-30 ℃, stirring for 20-40min, performing ultraviolet irradiation for polymerization reaction, and obtaining polyacrylamide nano-silver emulsion after the reaction is finished;
3) adding an antioxidant into the emulsion according to a set mass fraction, simultaneously adding acid as a catalyst, controlling the temperature to be 30-60 ℃, reacting for 10-20h, and finally neutralizing the added acid by using a sodium hydroxide solution with the mass concentration of 10-30% to prepare a modified polyacrylamide emulsion;
4) concentrating and dehydrating the modified polyacrylamide emulsion, drying in a vacuum environment, drying, cooling and crushing to obtain powdery modified polyacrylamide;
s2, mixing the prepared modified polyacrylamide with zeolite powder, magnesium hydroxide, anhydrous trisodium phosphate, calcium carbonate and chitosan, fully stirring for 5-10min, adding the tackifier, and continuously stirring for 5-15 min;
the preparation method of the anhydrous trisodium phosphate comprises the following steps:
1) adding trisodium phosphate dodecahydrate crystal into a dissolving container, simultaneously adding 10-15% by volume of water into the container, heating the interior of the container to 85-95 ℃, stirring for dissolving, and purifying the solution;
2) pumping the solution into a metering container, atomizing by a spraying device, and performing spray drying at the atomizing steam pressure of 0.15-0.3Mpa, the inlet temperature of 650-;
s3, granulating the mixture by using a granulator, drying the prepared granules at the temperature of 40-50 ℃, and obtaining the sludge conditioner after drying, wherein the particle size of the conditioner is 100-200 meshes.
Example two:
the embodiment of the invention provides a sludge conditioner for sewage treatment, which comprises the following raw materials in parts by weight: 45 parts of modified polyacrylamide, 15 parts of zeolite powder, 10 parts of magnesium hydroxide, 14 parts of anhydrous trisodium phosphate, 7.5 parts of calcium carbonate, 16 parts of chitosan and 3 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 70% of polyacrylamide body, 10% of nano-silver, 10% of surfactant and 10% of antioxidant.
Wherein the surfactant is one or more of fatty alcohol polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate and heavy alkylbenzene sulfonate, and the antioxidant is one or more of 2, 6-tertiary butyl-4-methylphenol, thiodipropionic acid diester and phosphite ester.
A preparation method of a sludge conditioner for sewage treatment comprises the following steps:
s1, preparing the modified polyacrylamide in the following specific mode:
1) taking a polyacrylamide body, adding clear water to prepare an acrylamide aqueous solution with the mass concentration of 20-40%, adding a nano-silver aqueous solution according to a set mass fraction, adjusting the pH value of the solution to 6-7 by using a sodium hydroxide solution with the mass concentration of 10-30%, and adding a surfactant according to a set mass fraction;
2) stirring the solution in a sealed container, introducing nitrogen or carbon dioxide, controlling the temperature in the container to be 10-30 ℃, stirring for 20-40min, performing ultraviolet irradiation for polymerization reaction, and obtaining polyacrylamide nano-silver emulsion after the reaction is finished;
3) adding an antioxidant into the emulsion according to a set mass fraction, simultaneously adding acid as a catalyst, controlling the temperature to be 30-60 ℃, reacting for 10-20h, and finally neutralizing the added acid by using a sodium hydroxide solution with the mass concentration of 10-30% to prepare a modified polyacrylamide emulsion;
4) concentrating and dehydrating the modified polyacrylamide emulsion, drying in a vacuum environment, drying, cooling and crushing to obtain powdery modified polyacrylamide;
s2, mixing the prepared modified polyacrylamide with zeolite powder, magnesium hydroxide, anhydrous trisodium phosphate, calcium carbonate and chitosan, fully stirring for 5-10min, adding the tackifier, and continuously stirring for 5-15 min;
the preparation method of the anhydrous trisodium phosphate comprises the following steps:
1) adding trisodium phosphate dodecahydrate crystal into a dissolving container, simultaneously adding 10-15% by volume of water into the container, heating the interior of the container to 85-95 ℃, stirring for dissolving, and purifying the solution;
2) pumping the solution into a metering container, atomizing by a spraying device, and performing spray drying at the atomizing steam pressure of 0.15-0.3Mpa, the inlet temperature of 650-;
s3, granulating the mixture by using a granulator, drying the prepared granules at the temperature of 40-50 ℃, and obtaining the sludge conditioner after drying, wherein the particle size of the conditioner is 100-200 meshes.
Example three:
the embodiment of the invention provides a sludge conditioner for sewage treatment, which comprises the following raw materials in parts by weight: 50 parts of modified polyacrylamide, 20 parts of zeolite powder, 15 parts of magnesium hydroxide, 18 parts of anhydrous trisodium phosphate, 10 parts of calcium carbonate, 20 parts of chitosan and 4 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 75% of polyacrylamide body, 10% of nano-silver, 7.5% of surfactant and 7.5% of antioxidant.
Wherein the surfactant is one or more of fatty alcohol polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate and heavy alkylbenzene sulfonate, and the antioxidant is one or more of 2, 6-tertiary butyl-4-methylphenol, thiodipropionic acid diester and phosphite ester.
A preparation method of a sludge conditioner for sewage treatment comprises the following steps:
s1, preparing the modified polyacrylamide in the following specific mode:
1) taking a polyacrylamide body, adding clear water to prepare an acrylamide aqueous solution with the mass concentration of 20-40%, adding a nano-silver aqueous solution according to a set mass fraction, adjusting the pH value of the solution to 6-7 by using a sodium hydroxide solution with the mass concentration of 10-30%, and adding a surfactant according to a set mass fraction;
2) stirring the solution in a sealed container, introducing nitrogen or carbon dioxide, controlling the temperature in the container to be 10-30 ℃, stirring for 20-40min, performing ultraviolet irradiation for polymerization reaction, and obtaining polyacrylamide nano-silver emulsion after the reaction is finished;
3) adding an antioxidant into the emulsion according to a set mass fraction, simultaneously adding acid as a catalyst, controlling the temperature to be 30-60 ℃, reacting for 10-20h, and finally neutralizing the added acid by using a sodium hydroxide solution with the mass concentration of 10-30% to prepare a modified polyacrylamide emulsion;
4) concentrating and dehydrating the modified polyacrylamide emulsion, drying in a vacuum environment, drying, cooling and crushing to obtain powdery modified polyacrylamide;
s2, mixing the prepared modified polyacrylamide with zeolite powder, magnesium hydroxide, anhydrous trisodium phosphate, calcium carbonate and chitosan, fully stirring for 5-10min, adding the tackifier, and continuously stirring for 5-15 min;
the preparation method of the anhydrous trisodium phosphate comprises the following steps:
1) adding trisodium phosphate dodecahydrate crystal into a dissolving container, simultaneously adding 10-15% by volume of water into the container, heating the interior of the container to 85-95 ℃, stirring for dissolving, and purifying the solution;
2) pumping the solution into a metering container, atomizing by a spraying device, and performing spray drying at the atomizing steam pressure of 0.15-0.3Mpa, the inlet temperature of 650-;
s3, granulating the mixture by using a granulator, drying the prepared granules at the temperature of 40-50 ℃, and obtaining the sludge conditioner after drying, wherein the particle size of the conditioner is 100-200 meshes.
In the invention, in the process of sewage treatment, the conditioner is directly added into sewage, the adding amount of the conditioner is 1-2g/L, then the sewage is stirred for 5-10min, and sludge after reaction is subjected to pressure filtration by a pressure filter, and then sludge cakes are output;
in the invention, part of sewage is quantitatively selected at the same time, a conditioner in the prior art is added, sludge after the same reaction is subjected to pressure filtration by a pressure filter, and a mud cake is output and used as a comparative example, the water content of the mud cakes in the three examples and the comparative example is detected, and the results are shown in the following table:
TABLE 1
As can be seen from the above Table 1, the water content of the sludge cake output by the conditioner of the present invention is significantly reduced and the conditioner has a good water reducing effect.
In the invention, the determination method of ammonia nitrogen content in sewage can adopt one of a nano colorimetric method, a phenol-hypochlorite (or salicylic acid-hypochlorite) colorimetric method, an electrode method and the like, firstly, a water sample is prepared, wherein the water sample comprises a comparative example and three examples, four samples of the water sample are all quantified to be 100ml, the comparative example is a sewage water sample which is not treated by a conditioner, the three examples are sewage water samples which are treated by the conditioner, the ammonia nitrogen content in the four samples is determined, and the determination results are shown in the following table:
TABLE 2
As can be seen from the above Table 2, the ammonia nitrogen content in the sewage is significantly reduced by using the conditioner of the present invention to treat the sewage, so that the inhibition effect of the wastewater on the microbial activity is greatly reduced, and the improvement of the degradation efficiency of the organic pollutants is facilitated.
In the actual treatment process, the filter cake after sewage treatment can be used as substances such as fertilizer and the like for agricultural planting, however, the filter cake after the treatment of the traditional regulator can not bring promotion effect to the growth of plants, in the invention, the growth condition of the plants is observed by utilizing a blank group, a control group and an implementation group, and the effect of the filter cake is analyzed;
wherein the blank group is plants planted in the soil without adding filter cakes; the control group is obtained by adding filter cakes obtained in the prior art into soil and then planting plants; adding the filter cakes obtained in the three embodiments into soil, and then planting plants; thus, data were obtained for the blank group, the control group, and the three working groups, and the results are shown in the following table:
TABLE 3
As can be seen from the above Table 3, when the conditioner of the present invention is used for treating sewage, the output mud cake has a significant promoting effect on the growth of plants, and can be widely applied to the field of agricultural planting.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A sludge conditioner for sewage treatment is characterized in that: the sludge conditioner comprises the following raw materials in parts by weight: 40-50 parts of modified polyacrylamide, 10-20 parts of zeolite powder, 5-15 parts of magnesium hydroxide, 10-18 parts of anhydrous trisodium phosphate, 5-10 parts of calcium carbonate, 12-20 parts of chitosan and 2-4 parts of tackifier;
the modified polyacrylamide comprises the following raw materials in percentage by mass: 70-90% of polyacrylamide body, 10-20% of nano silver, 5-10% of surfactant and 5-10% of antioxidant.
2. The sludge conditioner for sewage treatment as claimed in claim 1, wherein: the sludge conditioner comprises the following raw materials in parts by weight: 40 parts of modified polyacrylamide, 10 parts of zeolite powder, 5 parts of magnesium hydroxide, 10 parts of anhydrous trisodium phosphate, 5 parts of calcium carbonate, 12 parts of chitosan and 2 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 80% of polyacrylamide body, 10% of nano-silver, 5% of surfactant and 5% of antioxidant.
3. The sludge conditioner for sewage treatment as claimed in claim 1, wherein: the sludge conditioner comprises the following raw materials in parts by weight: 45 parts of modified polyacrylamide, 15 parts of zeolite powder, 10 parts of magnesium hydroxide, 14 parts of anhydrous trisodium phosphate, 7.5 parts of calcium carbonate, 16 parts of chitosan and 3 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 70% of polyacrylamide body, 10% of nano-silver, 10% of surfactant and 10% of antioxidant.
4. The sludge conditioner for sewage treatment as claimed in claim 1, wherein: the sludge conditioner comprises the following raw materials in parts by weight: 50 parts of modified polyacrylamide, 20 parts of zeolite powder, 15 parts of magnesium hydroxide, 18 parts of anhydrous trisodium phosphate, 10 parts of calcium carbonate, 20 parts of chitosan and 4 parts of tackifier; the modified polyacrylamide comprises the following raw materials in percentage by mass: 75% of polyacrylamide body, 10% of nano-silver, 7.5% of surfactant and 7.5% of antioxidant.
5. The sludge conditioner for sewage treatment as claimed in claim 1, wherein: the surfactant is one or more of fatty alcohol-polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate and heavy alkylbenzene sulfonate, and the antioxidant is one or more of 2, 6-tertiary butyl-4-methylphenol, thiodipropionic acid diester and phosphite ester.
6. A preparation method of a sludge conditioner for sewage treatment is characterized by comprising the following steps: the preparation method comprises the following steps:
s1, preparing the modified polyacrylamide in the following specific mode:
1) taking a polyacrylamide body, adding clear water to prepare an acrylamide aqueous solution with the mass concentration of 20-40%, adding a nano-silver aqueous solution according to a set mass fraction, adjusting the pH value of the solution to 6-7 by using a sodium hydroxide solution with the mass concentration of 10-30%, and adding a surfactant according to a set mass fraction;
2) stirring the solution in a sealed container, introducing nitrogen or carbon dioxide, controlling the temperature in the container to be 10-30 ℃, stirring for 20-40min, performing ultraviolet irradiation for polymerization reaction, and obtaining polyacrylamide nano-silver emulsion after the reaction is finished;
3) adding an antioxidant into the emulsion according to a set mass fraction, simultaneously adding acid as a catalyst, controlling the temperature to be 30-60 ℃, reacting for 10-20h, and finally neutralizing the added acid by using a sodium hydroxide solution with the mass concentration of 10-30% to prepare a modified polyacrylamide emulsion;
4) concentrating and dehydrating the modified polyacrylamide emulsion, drying in a vacuum environment, drying, cooling and crushing to obtain powdery modified polyacrylamide;
s2, mixing the prepared modified polyacrylamide with zeolite powder, magnesium hydroxide, anhydrous trisodium phosphate, calcium carbonate and chitosan, fully stirring for 5-10min, adding the tackifier, and continuously stirring for 5-15 min;
and S3, granulating the mixture by using a granulator, drying the prepared granules at the temperature of 40-50 ℃, and drying to obtain the sludge conditioner.
7. The method for preparing the sludge conditioner for sewage treatment according to claim 6, wherein the method comprises the following steps: the preparation method of the anhydrous trisodium phosphate comprises the following steps:
1) adding trisodium phosphate dodecahydrate crystal into a dissolving container, simultaneously adding 10-15% by volume of water into the container, heating the interior of the container to 85-95 ℃, stirring for dissolving, and purifying the solution;
2) pumping the solution into a metering container, atomizing by a spraying device, and performing spray drying at the atomizing steam pressure of 0.15-0.3Mpa, the inlet temperature of 650-.
8. The method for preparing the sludge conditioner for sewage treatment according to claim 6, wherein the method comprises the following steps: the granularity of the sludge conditioner is 100-200 meshes.
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