CN108773991B - Method for improving biogas yield - Google Patents
Method for improving biogas yield Download PDFInfo
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- CN108773991B CN108773991B CN201810717866.2A CN201810717866A CN108773991B CN 108773991 B CN108773991 B CN 108773991B CN 201810717866 A CN201810717866 A CN 201810717866A CN 108773991 B CN108773991 B CN 108773991B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 239000000499 gel Substances 0.000 claims abstract description 17
- 239000010871 livestock manure Substances 0.000 claims abstract description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 16
- -1 acetylsalicylic acid rare earth Chemical class 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229960001138 acetylsalicylic acid Drugs 0.000 claims abstract description 12
- 238000000855 fermentation Methods 0.000 claims abstract description 12
- 239000000017 hydrogel Substances 0.000 claims abstract description 12
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 230000004151 fermentation Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- MAYVZUQEFSJDHA-UHFFFAOYSA-N 1,5-bis(methylsulfanyl)naphthalene Chemical compound C1=CC=C2C(SC)=CC=CC2=C1SC MAYVZUQEFSJDHA-UHFFFAOYSA-N 0.000 claims abstract description 6
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003999 initiator Substances 0.000 claims abstract description 6
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 claims abstract description 6
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 claims abstract description 6
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 claims abstract description 6
- BHXBZLPMVFUQBQ-UHFFFAOYSA-K samarium(iii) chloride Chemical compound Cl[Sm](Cl)Cl BHXBZLPMVFUQBQ-UHFFFAOYSA-K 0.000 claims abstract description 6
- JZLOKWGVGHYBKD-UHFFFAOYSA-M sodium;2-acetyloxybenzoate Chemical compound [Na+].CC(=O)OC1=CC=CC=C1C([O-])=O JZLOKWGVGHYBKD-UHFFFAOYSA-M 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 5
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 3
- GHJOIQFPDMIKHT-UHFFFAOYSA-N propane-1,2,3-triol;prop-2-enoic acid Chemical compound OC(=O)C=C.OCC(O)CO GHJOIQFPDMIKHT-UHFFFAOYSA-N 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 210000003608 fece Anatomy 0.000 abstract description 8
- 244000144972 livestock Species 0.000 abstract description 8
- 244000144977 poultry Species 0.000 abstract description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229940068372 acetyl salicylate Drugs 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010806 kitchen waste Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010796 biological waste Substances 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- 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
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for improving biogas production, which comprises the following operation steps: (1) adding samarium chloride and dysprosium chloride into water, then continuously adding sodium acetylsalicylate, mixing and stirring uniformly, and performing heat preservation treatment to obtain acetylsalicylic acid rare earth; (2) uniformly mixing methyl acrylate, stearyl methacrylate and acrylic acid glyceryl ether ester, adding N, N-dimethylacrylamide, an initiator and N, N, N ', N' -tetramethylethylenediamine, uniformly mixing and stirring, continuously adding acetylsalicylic acid rare earth, uniformly mixing and stirring, performing heat preservation treatment to obtain hydrogel, and drying to obtain gel powder; (3) and mixing the gel powder and the livestock and poultry manure uniformly, adding the mixture into a biogas reactor, and performing biogas fermentation. The method for improving the biogas production can effectively improve the utilization rate of the livestock manure and improve the biogas production of the livestock manure.
Description
Technical Field
The invention belongs to the technical field of biogas fermentation, and particularly relates to a method for improving biogas yield.
Background
The annual output of livestock and poultry manure in China is about 17.3 hundred million t, which is 2.7 times of that of industrial waste. Due to poor management, 25% -30% of livestock and poultry manure flows into the water body along with sewage every year, which is equivalent to the discharge amount of 8.7tCOD or 6.2tBOD industrial pollutants. With the promotion of new rural construction in China and the continuous expansion of the scale of the breeding industry, the number is further improved. The scientific and reasonable treatment of the livestock and poultry manure and the sewage becomes an important content for accelerating the urban and rural integration and the ecological civilized construction. The biogas production is one of important ways for deeply developing and recycling biomass resources, and can realize harmless treatment and multi-level resource comprehensive utilization of wastes such as livestock and poultry manure, kitchen waste and the like. The core of the biogas technology is anaerobic fermentation, which can produce biogas by using different fermentation raw materials such as livestock and poultry manure, kitchen waste, sludge wastewater, energy crops, straws and stalks, aquatic plants, municipal organic waste and the like. In addition, the potential of different fermentation raw materials for producing biogas is different, and the potential of biological waste for producing biogas is greater than that of livestock and poultry manure for each ton of fermentation substrate. The waste is treated by anaerobic fermentation, so that green energy is obtained, and the pollution of organic matters is reduced. However, in the biogas production technology in the prior art, the biogas amount generated per kilogram of dry matter is low, and the utilization rate of waste is low.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for improving the biogas production rate.
The invention is realized by the following technical scheme.
A method for improving biogas production comprises the following operation steps:
(1) adding 15-18 parts of samarium chloride and 20-26 parts of dysprosium chloride into 260 parts of 230-one water by weight, continuously adding 44-50 parts of sodium acetylsalicylate, uniformly mixing and stirring, heating to 88-92 ℃, and carrying out heat preservation treatment for 3-4 hours to obtain the rare earth acetylsalicylic acid;
(2) according to the weight portion, 34 to 38 portions of methyl acrylate, 13 to 17 portions of octadecyl methacrylate and 21 to 25 portions of acrylic acid glycerol ether ester are evenly mixed, the pH value is adjusted to 6.5 to 7.5 by adopting sodium hydroxide solution, then 320-350 parts of N, N-dimethylacrylamide, 2-4 parts of initiator and 1-2 parts of N, N, N ', N' -tetramethylethylenediamine are slowly added into the mixture, and after the mixture is uniformly mixed and stirred, continuously adding 22-29 parts of acetylsalicylic acid rare earth into the mixture, uniformly mixing and stirring, heating to 37-40 ℃, carrying out heat preservation treatment for 13-15 hours to obtain hydrogel, then repeatedly rinsing the product for 3-5 times by adopting a swelling shrinkage method, drying the product for 24-28 hours in vacuum at 70 ℃, and crushing the product into white powder to obtain gel powder;
(3) uniformly mixing the gel powder and the livestock manure according to the mass ratio of 1:68-72, adding the mixture into a biogas reactor, and performing biogas fermentation.
Specifically, in the step (2), the mass fraction of the sodium hydroxide solution is 10-15%.
Specifically, in the step (2), the average particle size of the gel powder is 60 to 80 mesh.
Specifically, in the step (3), the biogas reactor is any one of an upflow solid reactor, an upflow anaerobic sludge blanket reactor, a complete mixing anaerobic reactor, and an expanded granular sludge blanket reactor.
According to the technical scheme, the beneficial effects of the invention are as follows:
the method for improving the biogas production rate provided by the invention is simple to operate and low in cost, and can effectively improve the utilization rate of the livestock manure and improve the biogas production rate of the livestock manure. The acetylsalicylic acid rare earth prepared in the step (1) can be effectively grafted on the surface of the hydrogel, so that the action effect of the rare earth element and methanogen is enhanced, the activity of the methanogen is further effectively enhanced, and the methane yield of the livestock manure is increased; the hydrogel not only can play a role in increasing the density of microorganisms, but also can effectively adsorb ammonia and nitrogen substances in the biogas, reduce the toxic action of the ammonia and nitrogen substances on the microorganisms, and improve the safety of the biogas; according to the invention, the rare earth elements are grafted on the surface of the hydrogel, so that the surface energy of the hydrogel is enhanced, the adsorption performance of the hydrogel is further enhanced, and the action effect of the hydrogel is effectively improved.
Detailed Description
The present invention is described in detail below with reference to specific examples, but the use and purpose of these exemplary embodiments are merely to exemplify the present invention, and do not set forth any limitation on the actual scope of the present invention in any form, and the scope of the present invention is not limited thereto.
Example 1
A method for improving biogas production comprises the following operation steps:
(1) adding 15 parts by weight of samarium chloride and 20 parts by weight of dysprosium chloride into 230 parts by weight of water, continuously adding 44 parts by weight of sodium acetylsalicylate, uniformly mixing and stirring, heating to 88 ℃, and carrying out heat preservation treatment for 3 hours to obtain rare earth acetylsalicylic acid;
(2) according to the weight parts, 34 parts of methyl acrylate, 13 parts of octadecyl methacrylate and 21 parts of acrylic acid glycerol ether ester are uniformly mixed, the pH value of the mixture is adjusted to 6.5 by adopting a sodium hydroxide solution, 320 parts of N, N-dimethylacrylamide, 2 parts of an initiator and 1 part of N, N, N ', N' -tetramethylethylenediamine are slowly added into the mixture, the mixture is uniformly mixed and stirred, 22 parts of acetylsalicylic acid rare earth is continuously added into the mixture, the mixture is uniformly mixed and stirred, the mixture is heated to 37 ℃, heat preservation treatment is carried out for 13 hours, hydrogel is prepared, the product is repeatedly rinsed for 3 times by adopting a swelling shrinkage method, and after vacuum drying is carried out for 24 hours at 70 ℃, the product is crushed into white powder, so that gel powder is prepared;
(3) and uniformly mixing the gel powder and the livestock manure according to the mass ratio of 1:68, adding the mixture into a biogas reactor, and performing biogas fermentation.
Specifically, in the step (2), the mass fraction of the sodium hydroxide solution is 10%.
Specifically, in the step (2), the average particle size of the gel powder is 60 mesh.
Specifically, in the step (3), the biogas reactor is an upflow solid reactor.
Example 2
A method for improving biogas production comprises the following operation steps:
(1) adding 16 parts by weight of samarium chloride and 24 parts by weight of dysprosium chloride into 250 parts by weight of water, then continuously adding 46 parts by weight of sodium acetylsalicylate, uniformly mixing and stirring, heating to 90 ℃, and carrying out heat preservation treatment for 3.5 hours to obtain rare earth acetylsalicylate;
(2) uniformly mixing 36 parts by weight of methyl acrylate, 15 parts by weight of octadecyl methacrylate and 23 parts by weight of acrylic acid glyceryl ether ester, adjusting the pH value of the mixture to 7.0 by using a sodium hydroxide solution, slowly adding 330 parts by weight of N, N-dimethylacrylamide, 3 parts by weight of an initiator and 2 parts by weight of N, N, N ', N' -tetramethylethylenediamine, continuously adding 24 parts by weight of acetylsalicylic acid rare earth into the mixture after uniformly mixing and stirring, heating the mixture to 38 ℃ after uniformly mixing and stirring, carrying out heat preservation treatment for 14 hours to prepare hydrogel, repeatedly rinsing the product for 4 times by using a swelling shrinkage method, carrying out vacuum drying at 70 ℃ for 26 hours, and crushing the product into white powder to prepare gel powder;
(3) and uniformly mixing the gel powder and the livestock manure according to the mass ratio of 1:70, adding the mixture into a biogas reactor, and performing biogas fermentation.
Specifically, in the step (2), the mass fraction of the sodium hydroxide solution is 13%.
Specifically, in the step (2), the average particle size of the gel powder is 70 mesh.
Specifically, in the step (3), the biogas reactor is an upflow solid reactor.
Example 3
A method for improving biogas production comprises the following operation steps:
(1) adding 18 parts of samarium chloride and 26 parts of dysprosium chloride into 260 parts of water by weight, continuously adding 50 parts of sodium acetylsalicylate, uniformly mixing and stirring, heating to 92 ℃, and carrying out heat preservation treatment for 4 hours to obtain rare earth acetylsalicylate;
(2) uniformly mixing 38 parts by weight of methyl acrylate, 17 parts by weight of octadecyl methacrylate and 25 parts by weight of acrylic acid glyceryl ether ester, adjusting the pH value of the mixture to 7.5 by using a sodium hydroxide solution, slowly adding 350 parts by weight of N, N-dimethylacrylamide, 4 parts by weight of an initiator and 2 parts by weight of N, N, N ', N' -tetramethylethylenediamine, continuously adding 29 parts by weight of acetylsalicylic acid rare earth into the mixture after uniformly mixing and stirring, heating the mixture to 40 ℃ after uniformly mixing and stirring, carrying out heat preservation treatment for 15 hours to prepare hydrogel, repeatedly rinsing the product for 5 times by using a swelling shrinkage method, carrying out vacuum drying at 70 ℃ for 28 hours, and crushing the product into white powder to prepare gel powder;
(3) and uniformly mixing the gel powder and the livestock manure according to the mass ratio of 1:72, adding the mixture into a biogas reactor, and performing biogas fermentation.
Specifically, in the step (2), the mass fraction of the sodium hydroxide solution is 15%.
Specifically, in the step (2), the average particle size of the gel powder is 80 mesh.
Specifically, in the step (3), the biogas reactor is an upflow solid reactor.
Comparative example 1
The operation steps are the same as those in example 1 except that acetylsalicylic acid rare earth is not added in the step (2).
The biogas production tests were carried out on animal excrements of the same composition by the methods of the respective examples and comparative examples, and then the biogas production per kg of dry matter of animal excrements was measured, and the test results are shown in table 1:
TABLE 1 Effect verification of a method for increasing biogas production
| Item | Biogas production, L/kg |
| Example 1 | 192 |
| Comparative example 1 | 162 |
| Example 2 | 198 |
| Example 3 | 201 |
As can be seen from Table 1, the method of the present embodiment can effectively increase the biogas production of the feces of the livestock.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. The method for increasing the biogas production rate is characterized by comprising the following operation steps:
(1) adding 15-18 parts of samarium chloride and 20-26 parts of dysprosium chloride into 260 parts of 230-one water by weight, continuously adding 44-50 parts of sodium acetylsalicylate, uniformly mixing and stirring, heating to 88-92 ℃, and carrying out heat preservation treatment for 3-4 hours to obtain the rare earth acetylsalicylic acid;
(2) according to the weight portion, 34 to 38 portions of methyl acrylate, 13 to 17 portions of octadecyl methacrylate and 21 to 25 portions of acrylic acid glycerol ether ester are evenly mixed, the pH value is adjusted to 6.5 to 7.5 by adopting sodium hydroxide solution, then 320-350 parts of N, N-dimethylacrylamide, 2-4 parts of initiator and 1-2 parts of N, N, N ', N' -tetramethylethylenediamine are slowly added into the mixture, and after the mixture is uniformly mixed and stirred, continuously adding 22-29 parts of acetylsalicylic acid rare earth into the mixture, uniformly mixing and stirring, heating to 37-40 ℃, carrying out heat preservation treatment for 13-15 hours to obtain hydrogel, then repeatedly rinsing the product for 3-5 times by adopting a swelling shrinkage method, drying the product for 24-28 hours in vacuum at 70 ℃, and crushing the product into white powder to obtain gel powder;
(3) uniformly mixing the gel powder and the livestock manure according to the mass ratio of 1:68-72, adding the mixture into a biogas reactor, and performing biogas fermentation.
2. The method for increasing the biogas production rate of claim 1, wherein in the step (2), the mass fraction of the sodium hydroxide solution is 10-15%.
3. The method for increasing biogas production according to claim 1, wherein in the step (2), the gel powder has an average particle size of 60-80 mesh.
4. The method for increasing biogas production according to claim 1, wherein in the step (3), the biogas reactor is any one of an upflow solid reactor, an upflow anaerobic sludge blanket reactor, a complete mixing anaerobic reactor and an expanded granular sludge blanket reactor.
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| CN108773991B true CN108773991B (en) | 2020-12-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654365A (en) * | 2005-01-19 | 2005-08-17 | 南京大学 | Method for enhancing activity of anaerobic sludge by using rare earth |
| CN101368097A (en) * | 2008-10-09 | 2009-02-18 | 同济大学 | Process for producing luminous rare earth-beta-diketone-polyvinyl pyridine macromolecule composite material |
| KR20120120625A (en) * | 2011-04-25 | 2012-11-02 | 에스케이이노베이션 주식회사 | Preparation for mixed carboxylate by using the seaweed |
| CN103145926A (en) * | 2013-01-17 | 2013-06-12 | 安徽安生生物化工科技有限责任公司 | Preparation method of wood element base polyacrylic acid microgel multiple-effect absorbing agent |
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- 2018-07-03 CN CN201810717866.2A patent/CN108773991B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654365A (en) * | 2005-01-19 | 2005-08-17 | 南京大学 | Method for enhancing activity of anaerobic sludge by using rare earth |
| CN101368097A (en) * | 2008-10-09 | 2009-02-18 | 同济大学 | Process for producing luminous rare earth-beta-diketone-polyvinyl pyridine macromolecule composite material |
| KR20120120625A (en) * | 2011-04-25 | 2012-11-02 | 에스케이이노베이션 주식회사 | Preparation for mixed carboxylate by using the seaweed |
| CN103145926A (en) * | 2013-01-17 | 2013-06-12 | 安徽安生生物化工科技有限责任公司 | Preparation method of wood element base polyacrylic acid microgel multiple-effect absorbing agent |
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