CN113501572A - Special flocculant for municipal refuse leachate and preparation method thereof - Google Patents
Special flocculant for municipal refuse leachate and preparation method thereof Download PDFInfo
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- CN113501572A CN113501572A CN202110853772.XA CN202110853772A CN113501572A CN 113501572 A CN113501572 A CN 113501572A CN 202110853772 A CN202110853772 A CN 202110853772A CN 113501572 A CN113501572 A CN 113501572A
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000002245 particle Substances 0.000 claims abstract description 55
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 239000003463 adsorbent Substances 0.000 claims abstract description 32
- 229940054190 hydroxypropyl chitosan Drugs 0.000 claims abstract description 31
- 239000004964 aerogel Substances 0.000 claims abstract description 30
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 30
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 30
- 229920002472 Starch Polymers 0.000 claims abstract description 28
- 239000008107 starch Substances 0.000 claims abstract description 28
- 235000019698 starch Nutrition 0.000 claims abstract description 28
- 229940037003 alum Drugs 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 230000000149 penetrating effect Effects 0.000 claims abstract description 25
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 23
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000008394 flocculating agent Substances 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims description 65
- 238000001035 drying Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 7
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 5
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 5
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 5
- 235000011054 acetic acid Nutrition 0.000 claims description 5
- 235000015165 citric acid Nutrition 0.000 claims description 5
- 239000011363 dried mixture Substances 0.000 claims description 5
- 239000004310 lactic acid Substances 0.000 claims description 5
- 235000014655 lactic acid Nutrition 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001508 potassium citrate Substances 0.000 claims description 5
- 229960002635 potassium citrate Drugs 0.000 claims description 5
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 claims description 5
- 235000011082 potassium citrates Nutrition 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 239000001632 sodium acetate Substances 0.000 claims description 5
- 235000017281 sodium acetate Nutrition 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 5
- 239000011975 tartaric acid Substances 0.000 claims description 5
- 235000002906 tartaric acid Nutrition 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000000049 pigment Substances 0.000 abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 3
- 229920001661 Chitosan Polymers 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 239000004965 Silica aerogel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- BHQCQFFYRZLCQQ-UHFFFAOYSA-N (3alpha,5alpha,7alpha,12alpha)-3,7,12-trihydroxy-cholan-24-oic acid Natural products OC1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)C(O)C2 BHQCQFFYRZLCQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004380 Cholic acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000012000 cholesterol Nutrition 0.000 description 1
- BHQCQFFYRZLCQQ-OELDTZBJSA-N cholic acid Chemical compound C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 BHQCQFFYRZLCQQ-OELDTZBJSA-N 0.000 description 1
- 229960002471 cholic acid Drugs 0.000 description 1
- 235000019416 cholic acid Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- KXGVEGMKQFWNSR-UHFFFAOYSA-N deoxycholic acid Natural products C1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)C(O)C2 KXGVEGMKQFWNSR-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- -1 hydroxypropyl Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a special flocculant for urban garbage penetrating fluid and a preparation method thereof, and relates to the technical field of flocculants. According to the invention, hydroxypropyl chitosan, plant starch and silicon dioxide aerogel are mixed, glutaraldehyde is added in the mixing process for reaction, so that initial particles are obtained, then a porous adsorbent is added to the initial particles, acrylamide and ammonium persulfate at the same time, so that mixed particles are formed and mixed with alum particles, and a special flocculating agent for municipal refuse penetrant is formed, so that the alum particles can adsorb most suspended matters in the penetrant, the porous adsorbent can adsorb pigments, the initial particles can adsorb heavy metal ions, and the color of the treated penetrant is lightened, so that workers can check the forming of flocs.
Description
Technical Field
The invention relates to the technical field of flocculating agents, in particular to a flocculating agent special for municipal refuse penetrating fluid and a preparation method thereof.
Background
In the process of municipal waste treatment, penetrating fluid is often generated in the process of stacking waste, in the process of treating the penetrating fluid, a flocculating agent is often needed to remove suspended matters in the penetrating fluid, and in the use process of the existing flocculating agent, a large amount of pigment is generally contained in the penetrating fluid, so that the color of the penetrating fluid is darker, and after the flocculating agent treats the penetrating fluid, the color of the penetrating fluid is still darker, so that whether the forming of flocs is finished or not is difficult to observe, and the use is inconvenient.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a special flocculant for municipal refuse leachate and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: the special flocculant for the urban garbage penetrating fluid is composed of hydroxypropyl chitosan, plant starch, silicon dioxide aerogel, glutaraldehyde, acrylamide, ammonium persulfate, a porous adsorbent and alum, and the components of the materials are as follows: 8-12% of hydroxypropyl chitosan, 12-16% of plant starch, 24-27% of silicon dioxide aerogel, 6-9% of glutaraldehyde, 9-13% of acrylamide, 5-8% of ammonium persulfate, 12-18% of porous adsorbent and 10-16% of alum.
In order to adsorb the pigment, the improvement of the invention is that the porous adsorbent is one or a mixture of more than one of activated carbon, silica gel or activated alumina in any proportion.
In order to be able to form the primary particles, the invention is further developed in that the selected silica aerogel is a fine silica aerogel particle having a diameter of 0.2 to 0.6 mm.
In order to achieve different effects, the invention has the improvement that the components of each material are as follows: 9% of hydroxypropyl chitosan, 14% of plant starch, 26% of silicon dioxide aerogel, 7% of glutaraldehyde, 11% of acrylamide, 6% of ammonium persulfate, 16% of porous adsorbent and 11% of alum.
In order to achieve different effects, the invention has the improvement that the components of each material are as follows: 10% of hydroxypropyl chitosan, 15% of plant starch, 26% of silicon dioxide aerogel, 7% of glutaraldehyde, 12% of acrylamide, 6% of ammonium persulfate, 14% of porous adsorbent and 10% of alum.
In order to achieve different effects, the invention has the improvement that the components of each material are as follows: 10% of hydroxypropyl chitosan, 16% of plant starch, 24% of silicon dioxide aerogel, 8% of glutaraldehyde, 13% of acrylamide, 7% of ammonium persulfate, 12% of porous adsorbent and 10% of alum.
A preparation method of a special flocculant for municipal refuse leachate comprises the following steps:
s1: and (2) pouring hydroxypropyl chitosan into the stirring tank, and pouring clear water into the stirring tank, wherein the weight ratio of hydroxypropyl chitosan to clear water is 1: 11, then mixing and stirring at the stirring speed of 50-60 revolutions per minute, then adding plant starch in the stirring process, adding silicon dioxide aerogel after the plant starch is dissolved, stirring and mixing for 80-90 minutes, and then adjusting the pH value to 8.2-9 by using a regulator to obtain an initial solution;
s2: adjusting the temperature of the initial solution obtained in the step S1 to 40-50 ℃, adding glutaraldehyde into a stirring tank for stirring at the stirring speed of 30-40 revolutions per minute for 3-4 hours, taking out the mixture in the stirring tank, drying the mixture in a drying furnace, and crushing the dried mixture to obtain initial particles;
s3: pouring the initial particles obtained in the step S2 into a reaction tank, and then pouring clear water into the reaction tank, wherein the weight ratio of the initial particles to the clear water is 1: 13 minutes, adding acrylamide and ammonium persulfate into the reaction tank, adjusting the temperature in the reaction tank to 50-60 ℃, then pumping out air in the reaction tank by using a vacuum machine, and continuously introducing nitrogen for reaction for 5-6 hours to obtain a mixed solution;
s4: adding a porous adsorbent into the mixed solution obtained in the step S3, stirring at the rotating speed of 50-60 rpm for 30-40 minutes, pouring out the mixture in the reaction tank, putting the mixture into a drying furnace for drying, and crushing after drying to obtain mixed particles;
s5: and (4) pouring the mixed particles obtained in the step (S3) into a mixing tank, adding alum particles into the mixing tank, mixing and stirring at the stirring speed of 30-35 revolutions per minute for 10-15 minutes, and taking out after mixing is finished to obtain the special flocculating agent for the municipal refuse penetrating fluid.
In order to make the reaction proceed normally, the invention improves that the regulator in step S1 includes but is not limited to citric acid, potassium citrate, lactic acid, tartaric acid, acetic acid, sodium acetate and sodium hydroxide.
Compared with the prior art, the invention has the advantages and positive effects that,
in the invention, hydroxypropyl chitosan is mixed with plant starch and silicon dioxide aerogel, glutaraldehyde is added in the mixing process for reaction, so that hydroxypropyl chitosan can be adhered to the surface of the silicon dioxide aerogel to obtain initial particles, then the initial particles, acrylamide and ammonium persulfate are simultaneously added into a porous adsorbent, so that the porous adsorbent can be mixed and adhered to the surface of the initial particles to form mixed particles, then alum particles are added to form the special flocculating agent for municipal refuse penetrating fluid, so that in the using process, the alum particles can adsorb most of suspended matters in the penetrating fluid in the initial stage, meanwhile, the porous adsorbent can adsorb matters such as pigments and the like, finally, the initial particles can adsorb heavy metal ions, the flocculation treatment on the penetrating fluid is completed, and the color of the treated penetrating fluid is lightened, so that a worker can view the formation of the batt.
Drawings
FIG. 1 is a flow chart of the invention for providing a special flocculant for municipal refuse leachate and a preparation method thereof.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Referring to fig. 1, the invention provides a special flocculant for municipal refuse leachate, which is composed of hydroxypropyl chitosan, plant starch, silica aerogel, glutaraldehyde, acrylamide, ammonium persulfate, porous adsorbent and alum, and the components of each material are as follows: 8-12% of hydroxypropyl chitosan, 12-16% of plant starch, 24-27% of silicon dioxide aerogel, 6-9% of glutaraldehyde, 9-13% of acrylamide, 5-8% of ammonium persulfate, 12-18% of porous adsorbent, 10-16% of alum, and hydroxypropyl chitosan which is one of chitosan derivatives, wherein hydroxypropyl is introduced on chitosan, so that the chitosan has a remarkable characteristic of good water-soluble chitosan, namely adsorption capacity, and a plurality of low-molecular-weight materials, such as metal ions, cholesterol, triglyceride, cholic acid, organic mercury and the like, can be adsorbed by the chitosan, thereby adsorbing the metal ions in the penetrating fluid.
The porous adsorbent is one or a mixture of more of activated carbon, silica gel or activated alumina in any proportion, the porous adsorbent can effectively adsorb solid matters of certain components in gas or liquid, and the activated carbon, silica gel and activated alumina can adsorb pigments, so that the color of penetrating fluid is lightened, and workers can check the forming of the flocs.
The selected silicon dioxide aerogel is silicon dioxide aerogel particles with the diameter of 0.2-0.6mm, the silicon dioxide aerogel is light, and formed mixed particles can be more easily suspended in the penetrating fluid, so that the special flocculating agent for the municipal refuse penetrating fluid can be more easily mixed with the penetrating fluid.
Example one
The components of each material are as follows: 9% of hydroxypropyl chitosan, 14% of plant starch, 26% of silicon dioxide aerogel, 7% of glutaraldehyde, 11% of acrylamide, 6% of ammonium persulfate, 16% of porous adsorbent and 11% of alum.
A preparation method of a special flocculant for municipal refuse leachate comprises the following steps:
s1: and (2) pouring hydroxypropyl chitosan into the stirring tank, and pouring clear water into the stirring tank, wherein the weight ratio of hydroxypropyl chitosan to clear water is 1: 11, then mixing and stirring at the stirring speed of 50 revolutions per minute, then adding plant starch in the stirring process, adding silicon dioxide aerogel after the plant starch is dissolved, stirring and mixing for 80 minutes, and then adjusting the ph value to 8.4 by using a regulator to obtain an initial solution;
s2: adjusting the temperature of the initial solution obtained in the step S1 to 40 ℃, adding glutaraldehyde into a stirring tank for stirring at the stirring speed of 30 revolutions per minute for 3 hours, taking out the mixture in the stirring tank, drying the mixture in a drying furnace, and crushing the dried mixture to obtain initial particles;
s3: pouring the initial particles obtained in the step S2 into a reaction tank, and then pouring clear water into the reaction tank, wherein the weight ratio of the initial particles to the clear water is 1: 13 minutes, adding acrylamide and ammonium persulfate into the reaction tank, adjusting the temperature in the reaction tank to 50 ℃, then pumping out air in the reaction tank by using a vacuum machine, and continuously introducing nitrogen for reaction for 5 hours to obtain a mixed solution;
s4: adding a porous adsorbent into the mixed solution obtained in the step S3, stirring for 30 minutes at a rotating speed of 50 revolutions per minute, pouring out the mixture in the reaction tank, putting the mixture into a drying furnace for drying, and crushing after drying to obtain mixed particles;
s5: and (4) pouring the mixed particles obtained in the step (S3) into a mixing tank, adding alum particles into the mixing tank, mixing and stirring at the stirring speed of 30 revolutions per minute for 12 minutes, and taking out after mixing is finished to obtain the special flocculating agent for the municipal refuse leachate.
The modifier in step S1 includes, but is not limited to, citric acid, potassium citrate, lactic acid, tartaric acid, acetic acid, sodium acetate, and sodium hydroxide.
Example two
The components of each material are as follows: 10% of hydroxypropyl chitosan, 15% of plant starch, 26% of silicon dioxide aerogel, 7% of glutaraldehyde, 12% of acrylamide, 6% of ammonium persulfate, 14% of porous adsorbent and 10% of alum.
A preparation method of a special flocculant for municipal refuse leachate comprises the following steps:
s1: and (2) pouring hydroxypropyl chitosan into the stirring tank, and pouring clear water into the stirring tank, wherein the weight ratio of hydroxypropyl chitosan to clear water is 1: 11, then mixing and stirring at the stirring speed of 50 revolutions per minute, then adding plant starch in the stirring process, adding silicon dioxide aerogel after the plant starch is dissolved, stirring and mixing for 85 minutes, and then adjusting the ph value to 8.4 by using a regulator to obtain an initial solution;
s2: adjusting the temperature of the initial solution obtained in the step S1 to 55 ℃, adding glutaraldehyde into a stirring tank for stirring at the stirring speed of 35 revolutions per minute for 3 hours, taking out the mixture in the stirring tank, drying the mixture in a drying furnace, and crushing the dried mixture to obtain initial particles;
s3: pouring the initial particles obtained in the step S2 into a reaction tank, and then pouring clear water into the reaction tank, wherein the weight ratio of the initial particles to the clear water is 1: 13 minutes, adding acrylamide and ammonium persulfate into the reaction tank, adjusting the temperature in the reaction tank to 53 ℃, then pumping out air in the reaction tank by using a vacuum machine, and continuously introducing nitrogen for reaction for 5 hours to obtain a mixed solution;
s4: adding a porous adsorbent into the mixed solution obtained in the step S3, stirring at a rotation speed of 50 revolutions per minute for 40 minutes, pouring out the mixture in the reaction tank, putting the mixture into a drying furnace for drying, and crushing after drying to obtain mixed particles;
s5: and (4) pouring the mixed particles obtained in the step (S3) into a mixing tank, adding alum particles into the mixing tank, mixing and stirring at the stirring speed of 30 revolutions per minute for 15 minutes, and taking out after mixing is finished to obtain the special flocculating agent for the municipal refuse leachate.
The modifier in step S1 includes, but is not limited to, citric acid, potassium citrate, lactic acid, tartaric acid, acetic acid, sodium acetate, and sodium hydroxide.
EXAMPLE III
The components of each material are as follows: 10% of hydroxypropyl chitosan, 16% of plant starch, 24% of silicon dioxide aerogel, 8% of glutaraldehyde, 13% of acrylamide, 7% of ammonium persulfate, 12% of porous adsorbent and 10% of alum.
A preparation method of a special flocculant for municipal refuse leachate comprises the following steps:
s1: and (2) pouring hydroxypropyl chitosan into the stirring tank, and pouring clear water into the stirring tank, wherein the weight ratio of hydroxypropyl chitosan to clear water is 1: 11, then mixing and stirring at the stirring speed of 60 revolutions per minute, then adding plant starch in the stirring process, adding silicon dioxide aerogel after the plant starch is dissolved, stirring and mixing for 90 minutes, and then adjusting the ph value to 8.5 by using a regulator to obtain an initial solution;
s2: adjusting the temperature of the initial solution obtained in the step S1 to 50 ℃, adding glutaraldehyde into a stirring tank for stirring at the stirring speed of 35 revolutions per minute for 4 hours, taking out the mixture in the stirring tank, drying the mixture in a drying furnace, and crushing the dried mixture to obtain initial particles;
s3: pouring the initial particles obtained in the step S2 into a reaction tank, and then pouring clear water into the reaction tank, wherein the weight ratio of the initial particles to the clear water is 1: 13 minutes, adding acrylamide and ammonium persulfate into the reaction tank, adjusting the temperature in the reaction tank to 60 ℃, then pumping out air in the reaction tank by using a vacuum machine, and continuously introducing nitrogen for reaction for 5 hours to obtain a mixed solution;
s4: adding a porous adsorbent into the mixed solution obtained in the step S3, stirring at a rotation speed of 60 revolutions per minute for 40 minutes, pouring out the mixture in the reaction tank, putting the mixture into a drying furnace for drying, and crushing after drying to obtain mixed particles;
s5: and (4) pouring the mixed particles obtained in the step (S3) into a mixing tank, adding alum particles into the mixing tank, mixing and stirring at the stirring speed of 35 revolutions per minute for 15 minutes, and taking out after mixing is finished to obtain the special flocculating agent for the municipal refuse leachate.
The modifier in step S1 includes, but is not limited to, citric acid, potassium citrate, lactic acid, tartaric acid, acetic acid, sodium acetate, and sodium hydroxide.
Hydroxypropyl chitosan is mixed with plant starch and silicon dioxide aerogel, and glutaraldehyde is added in the mixing process for reaction, so that the hydroxypropyl chitosan can be adhered to the surface of the silicon dioxide aerogel, thereby obtaining initial particles, then adding the initial particles, acrylamide and ammonium persulfate into the porous adsorbent simultaneously to enable the porous adsorbent to be mixed and adhered to the surfaces of the initial particles to form mixed particles, then alum particles are added to form a flocculating agent special for municipal refuse permeate, so that the alum particles adsorb most suspended matters in the permeate in the initial stage during the use process, meanwhile, the porous adsorbent can adsorb substances such as pigments and the like, and finally the initial particles can adsorb heavy metal ions, thereby completing the flocculation treatment of the penetrating fluid and simultaneously lightening the color of the treated penetrating fluid so that workers can check the forming of the flocs.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes by using the technical contents disclosed in the above description to other fields, but any simple modification, equivalent change and change made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. The special flocculant for urban refuse penetrating fluid is characterized in that: the special flocculant for the urban garbage penetrating fluid is composed of hydroxypropyl chitosan, plant starch, silicon dioxide aerogel, glutaraldehyde, acrylamide, ammonium persulfate, a porous adsorbent and alum, and the components of the materials are as follows: 8-12% of hydroxypropyl chitosan, 12-16% of plant starch, 24-27% of silicon dioxide aerogel, 6-9% of glutaraldehyde, 9-13% of acrylamide, 5-8% of ammonium persulfate, 12-18% of porous adsorbent and 10-16% of alum.
2. The flocculant according to claim 1, which is specially used for municipal waste leachate, and is characterized in that: the porous adsorbent is one or a mixture of more of activated carbon, silica gel or activated alumina in any proportion.
3. The flocculant according to claim 1, which is specially used for municipal waste leachate, and is characterized in that: the selected silicon dioxide aerogel is silicon dioxide aerogel particles, and the diameter of the selected silicon dioxide aerogel particles is 0.2-0.6 mm.
4. The flocculant according to claim 1, which is specially used for municipal waste leachate, and is characterized in that: the components of each material are as follows: 9% of hydroxypropyl chitosan, 14% of plant starch, 26% of silicon dioxide aerogel, 7% of glutaraldehyde, 11% of acrylamide, 6% of ammonium persulfate, 16% of porous adsorbent and 11% of alum.
5. The flocculant according to claim 1, which is specially used for municipal waste leachate, and is characterized in that: the components of each material are as follows: 10% of hydroxypropyl chitosan, 15% of plant starch, 26% of silicon dioxide aerogel, 7% of glutaraldehyde, 12% of acrylamide, 6% of ammonium persulfate, 14% of porous adsorbent and 10% of alum.
6. The flocculant according to claim 1, which is specially used for municipal waste leachate, and is characterized in that: the components of each material are as follows: 10% of hydroxypropyl chitosan, 16% of plant starch, 24% of silicon dioxide aerogel, 8% of glutaraldehyde, 13% of acrylamide, 7% of ammonium persulfate, 12% of porous adsorbent and 10% of alum.
7. The method for preparing flocculant specially used for municipal refuse leachate according to claim 1, wherein the flocculant comprises: the method comprises the following steps:
s1: and (2) pouring hydroxypropyl chitosan into the stirring tank, and pouring clear water into the stirring tank, wherein the weight ratio of hydroxypropyl chitosan to clear water is 1: 11, then mixing and stirring at the stirring speed of 50-60 revolutions per minute, then adding plant starch in the stirring process, adding silicon dioxide aerogel after the plant starch is dissolved, stirring and mixing for 80-90 minutes, and then adjusting the pH value to 8.2-9 by using a regulator to obtain an initial solution;
s2: adjusting the temperature of the initial solution obtained in the step S1 to 40-50 ℃, adding glutaraldehyde into a stirring tank for stirring at the stirring speed of 30-40 revolutions per minute for 3-4 hours, taking out the mixture in the stirring tank, drying the mixture in a drying furnace, and crushing the dried mixture to obtain initial particles;
s3: pouring the initial particles obtained in the step S2 into a reaction tank, and then pouring clear water into the reaction tank, wherein the weight ratio of the initial particles to the clear water is 1: 13 minutes, adding acrylamide and ammonium persulfate into the reaction tank, adjusting the temperature in the reaction tank to 50-60 ℃, then pumping out air in the reaction tank by using a vacuum machine, and continuously introducing nitrogen for reaction for 5-6 hours to obtain a mixed solution;
s4: adding a porous adsorbent into the mixed solution obtained in the step S3, stirring at the rotating speed of 50-60 rpm for 30-40 minutes, pouring out the mixture in the reaction tank, putting the mixture into a drying furnace for drying, and crushing after drying to obtain mixed particles;
s5: and (4) pouring the mixed particles obtained in the step (S3) into a mixing tank, adding alum particles into the mixing tank, mixing and stirring at the stirring speed of 30-35 revolutions per minute for 10-15 minutes, and taking out after mixing is finished to obtain the special flocculating agent for the municipal refuse penetrating fluid.
8. The method for preparing flocculant specially used for municipal refuse leachate according to claim 1, wherein the flocculant comprises: the modifier in step S1 includes, but is not limited to, citric acid, potassium citrate, lactic acid, tartaric acid, acetic acid, sodium acetate, and sodium hydroxide.
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| US4279756A (en) * | 1976-05-03 | 1981-07-21 | Commonwealth Scientific And Industrial Research Organization | Water clarification |
| CN103265100A (en) * | 2013-05-08 | 2013-08-28 | 上海纳米技术及应用国家工程研究中心有限公司 | Iron-aluminum composite high-performance absorption flocculant, preparation method and applications thereof |
| CN105461032A (en) * | 2015-10-30 | 2016-04-06 | 无锡市嘉邦电力管道厂 | Sewage treatment flocculant and application thereof |
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