CN115594730A - Fish feed protein membrane concentration and separation integrated process - Google Patents
Fish feed protein membrane concentration and separation integrated process Download PDFInfo
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- CN115594730A CN115594730A CN202211229525.3A CN202211229525A CN115594730A CN 115594730 A CN115594730 A CN 115594730A CN 202211229525 A CN202211229525 A CN 202211229525A CN 115594730 A CN115594730 A CN 115594730A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/34—Extraction; Separation; Purification by filtration, ultrafiltration or reverse osmosis
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/142—Amino acids; Derivatives thereof
- A23K20/147—Polymeric derivatives, e.g. peptides or proteins
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Water Supply & Treatment (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
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Abstract
The invention relates to a fish feed protein membrane concentration and separation integrated process, which comprises the following steps of S1: preparing a stock solution to be separated, injecting the stock solution into a separation stock solution box, and removing macromolecular impurities in the stock solution under the action of a microfiltration system to obtain microfiltration membrane permeate; s2: separating polypeptide and polysaccharide in the microfiltration membrane permeate through an ultrafiltration component to form ultrafiltration concentrated solution and ultrafiltration permeate, reserving the ultrafiltration permeate containing concentrated protein, and returning the ultrafiltration concentrated solution containing polypeptide and polysaccharide to an original water tank; s3: the ultrafiltration permeating liquid is sieved by nanofiltration equipment to remove water and partial residual inorganic salt and micromolecular impurities to form nanofiltration concentrated liquid and nanofiltration permeating liquid with the solid content being more than or equal to 30 percent, and the nanofiltration permeating liquid with concentrated protein is neutralized by pH adjustment; s4: and finally, drying the nanofiltration filtrate to obtain protein powder with the protein content not lower than 25%. The invention can improve the protein quality and reduce the enterprise cost.
Description
Technical Field
The invention relates to the technical field of protein separation, in particular to a fish feed protein membrane concentration and separation integrated process.
Background
Fish feed, as the name implies, is feed for fish. It is mainly composed of protein, fat, vitamins and minerals. The protein is an important nutrient substance for the survival of fishes and shrimps and is an important constituent substance for forming cells, tissues and organs of a body. The normal growth of fishes requires that the feed contains enough protein which is easy to digest and absorb and has proper proportion of various amino acids. When the protein intake of the fish is insufficient, the fish grows slowly, the immunity of the organism is reduced, the tissue is updated slowly, the wound healing force is poor, the fish is easy to suffer from diseases, and the production time is delayed. Therefore, the mastering of the protein level of the fish feed is greatly beneficial to guiding fishery production;
the existing protein concentration methods comprise: acetone precipitation; immunoprecipitation; trichloroacetic acid precipitation; ammonium sulfate precipitation; (low temperature) organic solvent precipitation; polyethylene glycol precipitation; dialysis method; ion exchange chromatography, freeze-drying method and the like, some of the methods often cause protein denaturation, some of the methods have high requirements on equipment, large investment and high energy consumption, the process flow is complex, and the time and the labor are consumed, and in the feed cost, the protein is the most expensive part, and how to concentrate the protein dosage in the feed while keeping the rapid growth of the fish, therefore, an integrated process for concentrating and separating the protein membrane of the fish feed is urgently needed to be provided, the culture cost can be reduced to a certain extent, and the method has important significance for promoting the progress of aquaculture technology.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a fish feed protein membrane concentration and separation integrated process.
(1) In order to achieve the purpose, the invention is realized by the following technical scheme: the method comprises the following steps:
s1: preparing a stock solution to be separated, injecting the stock solution to be separated into a separation stock solution tank, and removing macromolecular impurities in the stock solution to be separated under the action of a microfiltration filtration system to obtain a microfiltration membrane permeate;
s2: separating polypeptide and polysaccharide in the microfiltration membrane permeate through an ultrafiltration component to form ultrafiltration concentrated solution and ultrafiltration permeate, reserving the ultrafiltration permeate containing concentrated protein, and returning the ultrafiltration concentrated solution containing polypeptide and polysaccharide to an original water tank;
s3: the ultrafiltration permeating liquid is sieved by nanofiltration equipment to remove water and partial residual inorganic salt and micromolecular impurities to form nanofiltration concentrated liquid and nanofiltration permeating liquid with the solid content being more than or equal to 30 percent, and the nanofiltration permeating liquid with concentrated protein is neutralized by pH adjustment;
s4: and finally, drying the nanofiltration filtrate to obtain protein powder with the protein content not lower than 25%.
And (2) the separation stock solution tank in the step (S1) pressurizes the stock solution to be separated into a microfiltration system through a stock solution pump, and conveys the obtained microfiltration membrane permeate into a filtration water tank.
The microfiltration and filtration system in the step S1 comprises the following steps:
s11: firstly, filtering the stock solution to be separated by a microfiltration membrane of a pipeline filter with the molecular weight cutoff of 120 mu m to remove larger solid impurities in the fluid;
s12: then filtering with a microfiltration membrane of a filter with the molecular weight cutoff of 1 mu m to remove particles and bacteria with the particle size of more than 1 mu m in the fluid;
s13: and finally, filtering the solution by a microfiltration membrane of a filter with the molecular weight cutoff of 0.22 mu m to remove particles and bacteria with the particle size of more than 0.22 mu m in the fluid to obtain the microfiltration membrane permeate.
In the step S2, the ultrafiltration module is provided with at least 3 ultrafiltration devices, and each ultrafiltration device can be connected in series or in parallel.
In the step S2, the microfiltration membrane permeate in the filtration water tank is pressurized into the ultrafiltration module by the ultrafiltration booster pump, the obtained ultrafiltration permeate is conveyed into the ultrafiltration product water tank, the obtained ultrafiltration concentrate is returned to the original water tank for backwashing, and backwashing water carries flushed impurities to be discharged from a sewage outlet.
In the step S2, an ultrafiltration concentrate flow meter is connected between the raw water tank and the ultrafiltration concentrate pipe, and an ultrafiltration effluent flow meter is connected between the ultrafiltration product water tank and the ultrafiltration permeate pipe; a nanofiltration concentrated liquid flow meter is connected between the ultrafiltration water production tank and the nanofiltration concentrated liquid pipe, and a nanofiltration liquid flow meter is connected between the nanofiltration water production tank and the nanofiltration permeation liquid pipe.
In the step S3, the ultrafiltration permeate in the ultrafiltration product water tank is pressurized into the nanofiltration device by the high-pressure pump, the obtained nanofiltration permeate is conveyed into the nanofiltration product water tank, and the obtained nanofiltration concentrate is returned to the ultrafiltration product water tank for backwashing.
The inlet and outlet of the raw liquid pump, the microfiltration and filtration system, the filtration water tank, the ultrafiltration booster pump, the ultrafiltration component, the ultrafiltration water production tank, the high-pressure pump, the nanofiltration equipment and the nanofiltration water production tank are all provided with control valves.
In the above steps S1 and S4, the pressure gauge components are used to adjust the pressure reasonably at each stage, and the constant speed and the constant pressure are respectively adopted for filtration, so as to reduce the viscosity of the feed liquid and increase the permeation rate, and the pressure gauge components include a pressure gauge before filtration, an ultrafiltration concentrate pressure gauge, a nanofiltration feed liquid pressure gauge, a pressure gauge after filtration, an ultrafiltration liquid outlet pressure gauge and a nanofiltration concentrate pressure gauge.
(2) Has the advantages that:
1. according to the invention, the microfiltration and filtration system, the ultrafiltration component and the nanofiltration equipment have low filtration energy consumption which is only about 1/5 of that of thermal concentration and low-temperature concentration, the membrane concentration process is normal-temperature concentration, the biological activity of protein is not affected, the cost of an enterprise can be greatly reduced, part of inorganic salt is removed while the membrane is concentrated, the ash content is reduced, the protein quality is effectively improved, the expansibility is good, and the industrial production expansion requirement is easily realized.
2. The invention is provided with a microfiltration system in front of the ultrafiltration component, which can effectively remove impurities in the system, prevent the lower end of the membrane component from being blocked, and effectively prolong the service life of the membrane component.
3. The invention is also provided with a pressure gauge component, the pressure and the flow can be reasonably regulated at each stage through the variable frequency control of the raw liquid pump, the ultrafiltration booster pump and the high-pressure pump, and constant-speed and constant-pressure filtration is respectively adopted, so that the viscosity of the liquid material is reduced, the passing speed of the membrane is effectively increased, and the interception performance is improved.
4. The membrane equipment has the advantages of simple operation, small occupied area, automatic operation of the equipment and convenient maintenance, and a plurality of filtering processes are arranged in a centralized way, thereby saving the space, improving the working efficiency and ensuring the intensification and the simplification of the whole process.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic view of the overall process of the present invention.
The labels in the figure are: the device comprises a stock solution to be separated 1, a stock solution separating tank 2, an ultrafiltration component 3, a stock water tank 4, a nanofiltration device 5, a microfiltration filtration system 6, a 120 mu m pipeline filter 7,1 mu m filter 8,0.22 mu m filter 9, a stock solution pump 10, a filtration water tank 11, an ultrafiltration booster pump 12, an ultrafiltration product water tank 13, an ultrafiltration concentrate pipe 14, an ultrafiltration concentrate flow meter 15, an ultrafiltration permeate pipe 16, an ultrafiltration effluent flow meter 17, a nanofiltration concentrate pipe 18, a nanofiltration concentrate flow meter 19, a nanofiltration permeate pipe 20, a nanofiltration effluent flow meter 21, a high-pressure pump 22, a nanofiltration product water tank 23 and a control valve 24.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
It is to be understood that the arrangement and content of the characters in the drawings are illustrative only and are not to be construed as limiting the invention.
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to the attached figure 1, the fish feed protein membrane concentration and separation integrated process is characterized by comprising the following specific steps: s1: preparing a stock solution 1 to be separated, injecting the stock solution 1 to be separated into a separation stock solution box 2, and removing macromolecular impurities in the stock solution 1 to be separated under the action of a microfiltration system 6 to obtain microfiltration membrane permeate; s2: separating polypeptide and polysaccharide in the microfiltration membrane permeate through an ultrafiltration component 3 to form an ultrafiltration concentrated solution and an ultrafiltration permeate, reserving the ultrafiltration permeate containing concentrated protein, and returning the ultrafiltration concentrated solution containing polypeptide and polysaccharide to a raw water tank 4; s3: the ultrafiltration permeating liquid is sieved by a nanofiltration device 5 to remove water, partial residual inorganic salt and small molecular impurities to form nanofiltration concentrated liquid and nanofiltration permeating liquid containing more than or equal to 30 percent of solid content, and the nanofiltration permeating liquid containing concentrated protein is neutralized by pH adjustment; s4: and finally, drying the nanofiltration filtrate to obtain protein powder with the protein content not lower than 25%.
Further, in the separation raw liquid tank 2 in step S1, the raw liquid 1 to be separated is pressurized into the microfiltration system 6 by the raw liquid pump 10, and the obtained microfiltration membrane permeate is delivered into the filtration water tank 11.
Further, the microfiltration filtration system 6 in step S1 comprises the steps of: s11: firstly, filtering the stock solution 1 to be separated by a microfiltration membrane of a pipeline filter 7 with the molecular weight cutoff of 120 mu m to remove larger solid impurities in the fluid; s12: then filtering through a microfiltration membrane of a filter 8 with the molecular weight cutoff of 1 mu m to remove particles and bacteria with the particle size of more than 1 mu m in the fluid; s13: and finally, filtering the solution by a microfiltration membrane of a filter 9 with the molecular weight cutoff of 0.22 mu m to remove particles and bacteria with the particle size of more than 0.22 mu m in the fluid to obtain the microfiltration membrane permeate.
Further, in step S2, the ultrafiltration module 3 is provided with at least 3 ultrafiltration devices, and each ultrafiltration device can be connected in series or in parallel.
Further, in step S2, the microfiltration membrane permeate in the filtration water tank 11 is pressurized into the ultrafiltration module 3 by the ultrafiltration booster pump 12, the obtained ultrafiltration permeate is conveyed into the ultrafiltration product water tank 13, the obtained ultrafiltration concentrate is returned to the original water tank 4 for backwashing, and backwashing water carries impurities washed away from the sewage outlet.
Further, in step S2, an ultrafiltration concentrate flow meter 15 is connected between the raw water tank 4 and the ultrafiltration concentrate pipe 14, and an ultrafiltration effluent flow meter 17 is connected between the ultrafiltration product water tank 13 and the ultrafiltration permeate pipe 16; a nanofiltration concentrated liquid flow meter 19 is connected between the ultrafiltration water production tank 13 and the nanofiltration concentrated liquid pipe 18, and a nanofiltration liquid flow meter 21 is connected between the nanofiltration water production tank 23 and the nanofiltration permeate pipe 20.
Further, in step S3, the ultrafiltration permeate in the ultrafiltration water production tank 13 is pressurized into the nanofiltration device 5 by the high pressure pump 22, the obtained nanofiltration permeate is conveyed into the nanofiltration water production tank 23, and the obtained nanofiltration concentrate is returned to the ultrafiltration water production tank 13 for backwashing.
Further, inlet and outlet positions of the raw liquid pump 10, the microfiltration and filtration system 6, the filtration water tank 11, the ultrafiltration booster pump 12, the ultrafiltration module 3, the ultrafiltration water production tank 13, the high-pressure pump 22, the nanofiltration device 5 and the nanofiltration water production tank 13 are all provided with control valves 24.
Further, in steps S1 and S4, through the manometer subassembly, at each stage reasonable regulation pressure, adopt constant speed and constant pressure filtration respectively, reduce feed liquid viscosity, increase the infiltration rate, the manometer subassembly includes the manometer before straining, ultrafiltration concentrate manometer, and the feed liquor manometer of receiving nanofiltration, the manometer after straining, ultrafiltration play liquid manometer and receive the concentrate manometer.
The working principle is as follows:
when in use, the stock solution 1 to be separated is prepared firstly, the stock solution 1 to be separated is injected into the stock solution separating box 2, and macromolecular impurities in the stock solution are removed under the action of the microfiltration and filtration system 6 to obtain microfiltration membrane permeate; then separating polypeptide and polysaccharide in the microfiltration membrane permeate through an ultrafiltration component 3 to form an ultrafiltration concentrated solution and an ultrafiltration permeate, reserving the ultrafiltration permeate containing concentrated protein, and returning the ultrafiltration concentrated solution containing polypeptide and polysaccharide to a raw water tank 4; then, the ultrafiltration permeating liquid is sieved by a nanofiltration device 5 to remove water and partial residual inorganic salt and small molecular impurities to form nanofiltration concentrated liquid and nanofiltration permeating liquid with the solid content of more than or equal to 30 percent, and the nanofiltration permeating liquid with concentrated protein is neutralized by pH adjustment; finally, drying the nanofiltration filtrate to obtain protein powder with the protein content not lower than 25%; according to the invention, through the microfiltration and filtration system, the filtration energy consumption of the ultrafiltration component and the nanofiltration equipment is low, which is only about 1/5 of that of the heat concentration and the low-temperature concentration, and the membrane concentration process is the normal-temperature concentration, so that the biological activity of the protein is not affected, the cost of an enterprise can be greatly reduced, part of inorganic salt is removed while the membrane is concentrated, the ash content is reduced, the protein quality is effectively improved, the expansibility is good, and the industrial production expansion requirement is easily realized; the ultrafiltration membrane component is arranged in front of the ultrafiltration component, so that impurities in the system can be effectively removed, the lower end of the membrane component is prevented from being blocked, the service life of the membrane component is effectively prolonged, in addition, the gradient separation of protein is realized, and the permeation liquid can meet the different requirements of different products on different protein molecular weights; the invention also arranges a pressure gauge component, can reasonably regulate pressure and flow at each stage by the variable frequency control of the raw liquid pump, the ultrafiltration booster pump and the high-pressure pump, and adopts constant-speed and constant-pressure filtration respectively, thereby reducing the viscosity of the liquid, effectively improving the passing speed of the membrane and improving the interception performance; the membrane equipment has the advantages of simple operation, small occupied area, automatic operation of the equipment and convenient maintenance, and a plurality of filtering processes are arranged in a centralized way, so that the space is saved, the working efficiency is improved, and the whole process is intensified and simplified;
the foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A fish feed protein membrane concentration and separation integrated process is characterized by comprising the following specific steps:
s1: preparing a stock solution (1) to be separated, injecting the stock solution (1) to be separated into a separation stock solution box (2), and removing macromolecular impurities in the stock solution under the action of a microfiltration system (6) to obtain a microfiltration membrane permeate;
s2: separating polypeptide and polysaccharide in the microfiltration membrane permeate through an ultrafiltration component (3) to form an ultrafiltration concentrated solution and an ultrafiltration permeate, reserving the ultrafiltration permeate containing concentrated protein, and returning the ultrafiltration concentrated solution containing polypeptide and polysaccharide to a raw water tank (4);
s3: the ultrafiltration permeating liquid is sieved by a nanofiltration device (5) to remove water and partial residual inorganic salt and micromolecular impurities to form nanofiltration concentrated liquid and nanofiltration permeating liquid with solid content more than or equal to 30 percent, and the nanofiltration permeating liquid with concentrated protein is neutralized by pH adjustment;
s4: and finally, drying the nanofiltration filtrate to obtain protein powder with the protein content not lower than 25%.
2. The integrated process of membrane concentration and separation for fish feed protein according to claim 1, wherein the separation stock solution tank (2) in step S1 pressurizes the stock solution (1) to be separated into the microfiltration system (6) by the stock solution pump (10), and the resulting microfiltration membrane permeate is transferred into the filtration water tank (11).
3. The integrated process for concentration and separation of fish feed protein membrane as claimed in claim 2, wherein the microfiltration and filtration system (6) in step S1 comprises the following steps:
s11: firstly, filtering the stock solution (1) to be separated through a microfiltration membrane of a pipeline filter (7) with the molecular weight cut-off of 120 mu m to remove larger solid impurities in the fluid;
s12: then filtering through a microfiltration membrane of a filter (8) with the molecular weight cutoff of 1 mu m to remove particles and bacteria with the particle size of more than 1 mu m in the fluid;
s13: and finally, filtering the solution by a microfiltration membrane of a filter (9) with the molecular weight cutoff of 0.22 mu m to remove particles and bacteria with the molecular weight cutoff of more than 0.22 mu m in the fluid to obtain microfiltration membrane permeate.
4. The integrated process of concentration and separation of a fish feed protein membrane as claimed in claim 1, wherein in the step S2, the ultrafiltration module (3) is provided with at least 3 ultrafiltration devices, and each ultrafiltration device can be connected in series or in parallel.
5. The integrated process of concentration and separation of the fish feed protein membrane as claimed in claim 4, wherein in the step S2, the microfiltration membrane permeate in the filtration water tank (11) is pressurized into the ultrafiltration module (3) through the ultrafiltration booster pump (12), the obtained ultrafiltration permeate is conveyed into the ultrafiltration production water tank (13), the obtained ultrafiltration concentrate is returned to the raw water tank (4) for backwashing, and the backwashing water carries the flushed impurities and is discharged from a sewage outlet.
6. The integrated process of concentration and separation of fish feed protein membrane as claimed in claim 5, wherein in step S2, an ultrafiltration concentrate flow meter (15) is connected between the raw water tank (4) and the ultrafiltration concentrate pipe (14), and an ultrafiltration effluent flow meter (17) is connected between the ultrafiltration water tank (13) and the ultrafiltration permeate pipe (16); a nanofiltration concentrated liquid flow meter (19) is connected between the ultrafiltration water production tank (13) and the nanofiltration concentrated liquid pipe (18), and a nanofiltration liquid flow meter (21) is connected between the nanofiltration water production tank (23) and the nanofiltration permeate pipe (20).
7. The integrated process of concentration and separation of fish feed protein membrane as claimed in claim 1, wherein in step S3, the ultrafiltration permeate in the ultrafiltration water production tank (13) is pressurized into the nanofiltration device (5) by the high pressure pump (22), the obtained nanofiltration permeate is conveyed into the nanofiltration water production tank (23), and the obtained nanofiltration concentrate is returned to the ultrafiltration water production tank (13) for backwashing.
8. The integrated process for concentration and separation of fish feed protein membrane according to 1~7, wherein the raw liquid pump (10), the microfiltration and filtration system (6), the filtration water tank (11), the ultrafiltration booster pump (12), the ultrafiltration module (3), the ultrafiltration water production tank (13), the high pressure pump (22), the nanofiltration equipment (5) and the nanofiltration water production tank (13) are provided with control valves (24) at the inlet and outlet.
9. The integrated process of concentration and separation of fish feed protein membrane as claimed in claim 1, wherein in steps S1 and S4, pressure is reasonably adjusted at each stage by pressure gauge components, constant-speed and constant-pressure filtration is respectively adopted to reduce viscosity of feed liquid and increase permeation speed, and the pressure gauge components comprise a pressure gauge before filtration, an ultrafiltration concentrate pressure gauge, a nanofiltration feed liquid pressure gauge, a pressure gauge after filtration, an ultrafiltration liquid pressure gauge and a nanofiltration concentrate pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229525.3A CN115594730A (en) | 2022-10-08 | 2022-10-08 | Fish feed protein membrane concentration and separation integrated process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229525.3A CN115594730A (en) | 2022-10-08 | 2022-10-08 | Fish feed protein membrane concentration and separation integrated process |
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| Publication Number | Publication Date |
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| CN115594730A true CN115594730A (en) | 2023-01-13 |
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| CN202211229525.3A Pending CN115594730A (en) | 2022-10-08 | 2022-10-08 | Fish feed protein membrane concentration and separation integrated process |
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- 2022-10-08 CN CN202211229525.3A patent/CN115594730A/en active Pending
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