CN111713595A - Method and device for deliming and degreasing tilapia skin - Google Patents
Method and device for deliming and degreasing tilapia skin Download PDFInfo
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- CN111713595A CN111713595A CN202010598488.8A CN202010598488A CN111713595A CN 111713595 A CN111713595 A CN 111713595A CN 202010598488 A CN202010598488 A CN 202010598488A CN 111713595 A CN111713595 A CN 111713595A
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- 241000276707 Tilapia Species 0.000 title claims abstract description 61
- 238000005238 degreasing Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 41
- 239000002253 acid Substances 0.000 claims abstract description 24
- 239000003513 alkali Substances 0.000 claims abstract description 19
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 230000007935 neutral effect Effects 0.000 claims abstract description 5
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 54
- 239000007788 liquid Substances 0.000 claims description 45
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 12
- 239000012670 alkaline solution Substances 0.000 claims description 2
- 241000276701 Oreochromis mossambicus Species 0.000 claims 8
- 241000251468 Actinopterygii Species 0.000 abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 235000018102 proteins Nutrition 0.000 description 15
- 102000004169 proteins and genes Human genes 0.000 description 15
- 108090000623 proteins and genes Proteins 0.000 description 15
- 235000013305 food Nutrition 0.000 description 7
- 238000005237 degreasing agent Methods 0.000 description 2
- 239000013527 degreasing agent Substances 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical class C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 235000021190 leftovers Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- ONJQDTZCDSESIW-UHFFFAOYSA-N polidocanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO ONJQDTZCDSESIW-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 235000004252 protein component Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23J—PROTEIN COMPOSITIONS FOR FOODSTUFFS; WORKING-UP PROTEINS FOR FOODSTUFFS; PHOSPHATIDE COMPOSITIONS FOR FOODSTUFFS
- A23J1/00—Obtaining protein compositions for foodstuffs; Bulk opening of eggs and separation of yolks from whites
- A23J1/04—Obtaining protein compositions for foodstuffs; Bulk opening of eggs and separation of yolks from whites from fish or other sea animals
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23J—PROTEIN COMPOSITIONS FOR FOODSTUFFS; WORKING-UP PROTEINS FOR FOODSTUFFS; PHOSPHATIDE COMPOSITIONS FOR FOODSTUFFS
- A23J1/00—Obtaining protein compositions for foodstuffs; Bulk opening of eggs and separation of yolks from whites
- A23J1/10—Obtaining protein compositions for foodstuffs; Bulk opening of eggs and separation of yolks from whites from hair, feathers, horn, skins, leather, bones, or the like
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Marine Sciences & Fisheries (AREA)
- Detergent Compositions (AREA)
Abstract
The invention relates to the technical field of fish skin processing, in particular to a tilapia skin deliming and degreasing method, which comprises the steps of putting tilapia skin into a sealed container, vacuumizing the sealed container, wherein the sealed container is in a negative pressure state; adding an acid solution/alkali solution into a sealed container; neutralizing the solution to be neutral after stirring, taking out the solution in the sealed container, cleaning the sealed container, and adding the nonionic surfactant; according to the invention, the air in the fish skin is expanded by adopting a negative pressure state for the sealed container, so that the local tear is caused, namely the fish skin is fluffy for the first time; by adding the acid/alkali solution, the generated heat can expand the water inside the fish skin, namely, the fish skin is fluffy for the second time, and the solution can enter the fish skin to react with the fat, namely, the fish skin is fluffy for the third time; after the three times of fluffing, the final degreasing is carried out by the nonionic surfactant conveniently; compared with the traditional processing mode, the processing time is shorter, the process is simpler, and the degreasing and deliming effects are better.
Description
Technical Field
The invention relates to the technical field of fish skin processing, in particular to a method and a device for deliming and degreasing tilapia skin.
Background
With the increasing export quantity of tilapia, the processing problem of fish scales, fish skins and other leftovers becomes more important, waste is caused by random discarding, the environment is polluted, the fish skins are rich in collagen, and the tilapia skin has the advantages of improving immunity, biocompatibility, moisture retention, biodegradability and the like, and is widely applied to the pharmaceutical industry, the cosmetic industry and the food industry, so that the technical problem to be solved in the prior art is to deliming and degreasing the tilapia skin to obtain the protein component of the tilapia skin.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method and a device for deliming and degreasing tilapia skin with simple process and high protein yield.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for deliming and degreasing tilapia skin comprises
Putting tilapia skin into a sealed container, and vacuumizing the sealed container, wherein the sealed container is in a negative pressure state;
adding an acid solution/an alkali solution into a sealed container, and stirring for 2-3 h;
and neutralizing the solution to be neutral after stirring is finished, taking out the solution in the sealed container, cleaning the sealed container, adding the nonionic surfactant, keeping for 1-4h, taking out and rinsing.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a tilapia skin deliming and degreasing device comprises
The top of the sealed container is provided with an air hole, a first liquid inlet hole and a second liquid inlet hole, the bottom of the sealed container is provided with a liquid outlet, and the bottom of the inner wall of the sealed container is also provided with an electromagnetic stirrer;
the vacuum pump is connected to the air hole;
the first container is internally provided with an acid solution/alkali solution, and is also provided with a first conveying pump which is connected to a first liquid inlet hole;
the second container is internally provided with a nonionic surfactant, and is also provided with a second delivery pump which is connected to a second liquid inlet hole;
the air hole, the first liquid inlet hole, the second liquid inlet hole and the liquid outlet are provided with electromagnetic valves; and
and the controller controls the work of the electromagnetic stirrer, the vacuum pump, the first delivery pump, the second delivery pump and the electromagnetic valve.
The invention has the beneficial effects that: the sealed container is put in the tilapia skin under the negative pressure state, and the air in the tilapia skin is expanded due to the negative pressure, so that the part of the tilapia skin is slightly torn, namely the tilapia skin is fluffy for the first time, and the tilapia skin is changed into a porous structure; moreover, by adding the acid solution/alkali solution, because the reaction of the acid solution/alkali solution and the water in the fish skin is an exothermic reaction, the generated heat and negative pressure are in a state, so that the water in the fish skin can expand and even be directly gasified, the fish skin is further fluffy, namely, fluffy for the second time, under the condition of stirring, the acid solution/alkali solution can further enter the fish skin through a fluffy structure to react with the fat, so that more fat is dissolved, and then the fish skin is further fluffy, namely fluffy for the third time; meanwhile, acid and water in the acid solution can dissolve and remove the water-soluble ash and the acid-soluble ash; finally, the fish skin is finally degreased through the nonionic surfactant, after the fish skin is fluffed for the first three times, the inside of the fish skin is basically and completely fiberized, and gaps are larger, so that the final degreasing is conveniently performed by a degreasing agent which has larger groups and stronger degreasing capability and is the nonionic surfactant; compared with the traditional processing mode, the processing time is shorter, the process is simpler, the structure of the device is simple, and the degreasing and deashing effects are better.
Drawings
FIG. 1 is a schematic structural diagram of a tilapia skin deliming and degreasing device according to an embodiment of the present invention;
description of reference numerals: 1. sealing the container; 11. air holes; 12. a first liquid inlet hole; 13. a second liquid inlet hole; 14. a liquid outlet; 15. an electromagnetic stirrer; 2. a vacuum pump; 3. a first container; 4. a first delivery pump; 5. a second container; 6. a second delivery pump.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
A method for deliming and degreasing tilapia skin comprises
Putting tilapia skin into a sealed container, and vacuumizing the sealed container, wherein the sealed container is in a negative pressure state;
adding an acid solution/an alkali solution into a sealed container, and stirring for 2-3 h;
and neutralizing the solution to be neutral after stirring is finished, taking out the solution in the sealed container, cleaning the sealed container, adding the nonionic surfactant, keeping for 1-4h, taking out and rinsing.
From the above description, the sealed container is in a negative pressure state, when the tilapia skin is put into the sealed container, the negative pressure makes the air inside the tilapia skin expand to cause slight local tearing, namely, the tilapia skin is fluffy for the first time, so that the tilapia skin becomes a porous structure; moreover, by adding the acid solution/alkali solution, because the reaction of the acid solution/alkali solution and the water in the fish skin is an exothermic reaction, the generated heat and negative pressure are in a state, so that the water in the fish skin can expand and even be directly gasified, the fish skin is further fluffy, namely, fluffy for the second time, under the condition of stirring, the acid solution/alkali solution can further enter the fish skin through a fluffy structure to react with the fat, so that more fat is dissolved, and then the fish skin is further fluffy, namely fluffy for the third time; meanwhile, acid and water in the acid solution can dissolve and remove the water-soluble ash and the acid-soluble ash; finally, the fish skin is finally degreased through the nonionic surfactant, after the fish skin is fluffed for the first three times, the inside of the fish skin is basically and completely fiberized, and gaps are larger, so that the final degreasing is conveniently performed by a degreasing agent which has larger groups and stronger degreasing capability and is the nonionic surfactant; compared with the traditional processing mode, the processing time is shorter, the process is simpler, the acid solution or the alkali solution can be selected randomly and can be used, and the degreasing and deliming effects are better.
Further, the volume fraction of the acid solution is 3.5-4.5%.
Further, the acid solution is hydrochloric acid.
Further, the mass percentage concentration of the alkali solution is 0.3% -0.5%.
Further, the alkali solution is sodium hydroxide.
Further, the "stirring" includes:
the stirring speed is 3-10r/min, and the rotating direction is changed once per minute.
Furthermore, the nonionic surfactant is added and ultrasonic cleaning is carried out simultaneously.
From the above description, through ultrasonic cleaning, with nonionic surfactant as the medium, can make things convenient for the motion of group, enter into the clearance of fish skin easily in react with fat and ash content, also can emulsify the bubble into the fat heating simultaneously, the convenient separation, and then promote the effect of degrease deliming.
Further, the nonionic surfactant is NP-10 with the volume fraction of 1%.
As can be seen from the above description, the NP-10 is one of nonylphenol polyoxyethylene ethers, and NP-10 is a polymer grafted with 10 ethylene oxides.
Further, the vacuum degree in the sealed container is less than-81.2 kpa under the negative pressure.
As can be seen from the above description, by controlling the vacuum degree to be less than-81.2 kpa, at which the boiling temperature of water is 60 ℃, which is also the critical point of protein denaturation, the acidic/alkaline solution is prevented from reacting with water on the fish skin to generate heat to denature the fish skin protein, and the cooked fish skin is prevented from being cooked.
Referring to fig. 1, a tilapia skin deliming and degreasing device comprises
The device comprises a sealed container 1, wherein an air hole 11, a first liquid inlet hole 12 and a second liquid inlet hole 13 are formed in the top of the sealed container 1, a liquid outlet 14 is formed in the bottom of the sealed container 1, and an electromagnetic stirrer 15 is further arranged on the bottom of the inner wall of the sealed container 1;
the vacuum pump 2 is connected to the air hole 11;
the device comprises a first container 3, wherein an acid solution/alkali solution is arranged in the first container 3, a first conveying pump 4 is further arranged on the first container 3, and the first conveying pump 4 is connected to a first liquid inlet hole 12;
the second container 5 is internally provided with a nonionic surfactant, the second container 5 is also provided with a second delivery pump 6, and the second delivery pump 6 is connected to a second liquid inlet hole 13;
the air hole 11, the first liquid inlet hole 12, the second liquid inlet hole 13 and the liquid outlet 14 are provided with electromagnetic valves; and
and a controller which controls the operations of the electromagnetic stirrer 15, the vacuum pump 2, the first delivery pump 4, the second delivery pump 6, and the electromagnetic valve.
GB/T5009.6-2016 (determination of fat in national food safety standards), GB/T5009.4-2016 (determination of ash in national food safety standards) and GB/5009.5-2016 (determination of protein in national food safety standards) are adopted for testing fat and ash in tilapia skin in all examples of the application, wherein the determination of ash in national food safety standards adopts the determination of total ash in the first-law food by the mass of a sample. GB/5009.5-2016 (national food safety Standard) protein determination adopts a second method spectrophotometry, and the protein loss rate calculation formula in the application is 1-
Example one
A tilapia skin deliming and degreasing device comprises
The top of the sealed container is provided with an air hole, a first liquid inlet hole and a second liquid inlet hole, the bottom of the sealed container is provided with a liquid outlet, and the bottom of the inner wall of the sealed container is also provided with an electromagnetic stirrer;
the vacuum pump is connected to the air hole;
the first container is internally provided with an acid solution/alkali solution, and is also provided with a first conveying pump which is connected to a first liquid inlet hole;
the second container is internally provided with a nonionic surfactant, and is also provided with a second delivery pump which is connected to a second liquid inlet hole;
the air hole, the first liquid inlet hole, the second liquid inlet hole and the liquid outlet are provided with electromagnetic valves; and
and the controller controls the work of the electromagnetic stirrer, the vacuum pump, the first delivery pump, the second delivery pump and the electromagnetic valve.
Example two
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device comprises the following steps
Putting tilapia skin into a sealed container, and vacuumizing the sealed container by a vacuum pump, wherein the sealed container is in a negative pressure state of-88.8 kpa;
adding a 3.5% hydrochloric acid solution by volume fraction into a sealed container through a first delivery pump, wherein the ratio of the materials to the liquid is 1: 4 (mass ratio), stirring for 2.5h by using an electromagnetic stirrer; during stirring, the stirring speed is 8r/min, and the rotating direction is changed once per minute.
Neutralizing the solution to be neutral after stirring, discharging the solution in the sealed container through a liquid outlet, cleaning the sealed container, conveying 1% NP-10 through a second conveying pump, carrying out ultrasonic cleaning, and taking out and rinsing the tilapia skin after 2 hours.
The ash content of the treated tilapia skin is 1.341%, the fat content is 0.045%, and the protein loss rate is 6.352%.
EXAMPLE III
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment is the same as the second embodiment, and is not repeated, and is different from the second embodiment in that the sealed container is in a negative pressure state of-85.4 kpa; adding a hydrochloric acid solution with the volume fraction of 4.0%, wherein the material-liquid ratio is 1: 4.5 (mass ratio), stirring for 3 hours; when stirring, the stirring speed is 6 r/min;
1.2% NP-10 was added while ultrasonic cleaning was continued for 2 hours, and then taken out and rinsed.
The ash content of the tilapia skin after treatment is 1.633%, the fat content is 0.029%, and the protein loss rate is 9.145%.
Example four
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment, which is the same as the second embodiment and is not repeated, and the difference from the second embodiment is that the sealed container is in a negative pressure state of-93.3 kpa; adding a hydrochloric acid solution with the volume fraction of 4.2%, wherein the material-liquid ratio is 1: 5 (mass ratio), stirring for 2.5 h; when stirring, the stirring speed is 3 r/min;
1.5% NP-10 was added while ultrasonic cleaning was continued for 2.5h, and then removed and rinsed.
The ash content of the tilapia skin after treatment is 1.593 percent, the fat content is 0.024 percent, and the protein loss rate is 13.343 percent.
EXAMPLE five
A method for deliming and degreasing tilapia skin comprises
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment, which is the same as the second embodiment and is not repeated, and the difference from the second embodiment is that the sealed container is in a negative pressure state of-82.1 kpa; adding a hydrochloric acid solution with the volume fraction of 4.3%, wherein the material-liquid ratio is 1: 6 (mass ratio), stirring for 2 h; when stirring, the stirring speed is 8 r/min;
0.8% NP-10 was added while ultrasonic cleaning, and after 3 hours, it was taken out and rinsed.
The ash content of the tilapia skin after treatment is 1.733 percent, the fat content is 0.079 percent, and the protein loss rate is 8.971 percent.
EXAMPLE six
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment is the same as the second embodiment, and is not repeated, and is different from the second embodiment in that the sealed container is in a negative pressure state of-84.6 kpa; adding a hydrochloric acid solution with the volume fraction of 4.5%, wherein the material-liquid ratio is 1: 8 (mass ratio), and stirring for 2 hours; when stirring, the stirring speed is 10 r/min;
adding 1% AEO-9 (fatty alcohol polyoxyethylene ether) and simultaneously carrying out ultrasonic cleaning, and taking out and rinsing after lasting for 4 h.
The ash content of the tilapia skin after treatment is 1.047%, the fat content is 0.079%, and the protein loss rate is 14.697%.
EXAMPLE seven
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment, which is the same as the second embodiment and is not repeated, and the difference from the second embodiment is that the sealed container is in a negative pressure state of-93.7 kpa;
adding a sodium hydroxide solution with the mass percentage concentration of 0.4%, wherein the material-liquid ratio is 1: 4 (mass ratio), stirring for 2.5 h; when stirring, the stirring speed is 10 r/min;
ultrasonic cleaning is carried out, and after 3 hours, the product is taken out and rinsed.
The ash content of the treated tilapia skin is 1.455%, the fat content is 0.063%, and the loss rate of protein is 8.402%.
Example eight
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment, which is the same as the second embodiment and is not repeated, and the difference from the second embodiment is that the sealed container is in a negative pressure state of-92.9 kpa; adding a sodium hydroxide solution with the mass percentage concentration of 0.5%, wherein the material-liquid ratio is 1: 5 (mass ratio), and stirring for 3 hours; when stirring, the stirring speed is 8 r/min;
1.5% NP-10 was added while ultrasonic cleaning was continued for 1 hour, and then taken out and rinsed.
The ash content of the tilapia skin after treatment is 1.451%, the fat content is 0.041%, and the protein loss rate is 11.291%.
Example nine
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment, which is the same as the second embodiment and is not repeated, and the difference from the second embodiment is that the sealed container is in a negative pressure state of-83.0 kpa;
adding a sodium hydroxide solution with the mass percentage concentration of 0.6%, wherein the material-liquid ratio is 1: 8 (mass ratio), stirring for 2.5 h; when stirring, the stirring speed is 10 r/min;
0.7% NP-10 was added while ultrasonic cleaning was continued for 1.5h, and then removed and rinsed.
The ash content of the treated tilapia skin is 1.972%, the fat content is 0.086%, and the protein loss rate is 6.837%.
Example ten
A tilapia skin deliming and degreasing method adopting the tilapia skin deliming and degreasing device in the first embodiment is the same as the second embodiment, and is not repeated, and is different from the second embodiment in that the sealed container is in a negative pressure state of-84.6 kpa;
adding a sodium hydroxide solution with the mass percentage concentration of 0.6%, wherein the material-liquid ratio is 1: 4 (mass ratio), and stirring for 2 hours; when stirring, the stirring speed is 3 r/min;
2% NP-10 was added while ultrasonic cleaning, and after 1 hour, it was taken out and rinsed.
The ash content of the tilapia skin after treatment is 0.547%, the fat content is 0.023% and the protein loss rate is 15.675%.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for deliming and degreasing tilapia skin is characterized by comprising
Putting tilapia skin into a sealed container, and vacuumizing the sealed container, wherein the sealed container is in a negative pressure state;
adding an acid solution/an alkali solution into a sealed container, and stirring for 2-3 h;
and neutralizing the solution to be neutral after stirring is finished, taking out the solution in the sealed container, cleaning the sealed container, adding the nonionic surfactant, keeping for 1-4h, taking out and rinsing.
2. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein the volume fraction of the acid solution is 3.5-4.5%.
3. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein the acid solution is hydrochloric acid.
4. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein the mass percentage concentration of the alkali solution is 0.3% -0.5%.
5. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein said alkaline solution is sodium hydroxide.
6. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein said "stirring" comprises:
the stirring speed is 3-10r/min, and the rotating direction is changed once per minute.
7. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein the nonionic surfactant is added and ultrasonic cleaning is simultaneously performed.
8. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein the nonionic surfactant is NP-10 with a volume fraction of 1%.
9. The method for deliming and degreasing tilapia mossambica skin according to claim 1, wherein the vacuum degree in the sealed container under negative pressure is less than-81.2 kpa.
10. A deliming and degreasing device for tilapia skin is characterized by comprising
The top of the sealed container is provided with an air hole, a first liquid inlet hole and a second liquid inlet hole, the bottom of the sealed container is provided with a liquid outlet, and the bottom of the inner wall of the sealed container is also provided with an electromagnetic stirrer;
the vacuum pump is connected to the air hole;
the first container is internally provided with an acid solution/alkali solution, and is also provided with a first conveying pump which is connected to a first liquid inlet hole;
the second container is internally provided with a nonionic surfactant, and is also provided with a second delivery pump which is connected to a second liquid inlet hole;
the air hole, the first liquid inlet hole, the second liquid inlet hole and the liquid outlet are provided with electromagnetic valves; and
and the controller controls the work of the electromagnetic stirrer, the vacuum pump, the first delivery pump, the second delivery pump and the electromagnetic valve.
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| CN107142293A (en) * | 2017-03-08 | 2017-09-08 | 大连工业大学 | A kind of preparation method of the tilapia skin gelatin peptide with antioxidation activity |
| CN110226664A (en) * | 2019-07-16 | 2019-09-13 | 山西潞安石圪节智华生物科技有限公司 | A kind of preparation method of peony seeds albumen powder |
| CN210385716U (en) * | 2019-08-07 | 2020-04-24 | 内蒙古普力泰材料科技有限公司 | Magnetic stirring mixer |
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