JP2009280534A - Apparatus for separating and recovering protein and method for separating and recovering protein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize a treatment for coagulating a protein by flushing a stock solution in an apparatus for separating and recovering a protein and a method for separating and recovering a protein in which a protein is separated from a protein-containing raw solution and recovered. <P>SOLUTION: The apparatus for separating and recovering a protein is equipped with a stock solution supply means 2 for supplying a fixed amount of a stock solution X to a decompression container 5 per unit time and a slurry supply means 7 for detecting a storage amount of a second slurry X2 in a coagulation part 6 and supplying the second slurry X2 in an amount based on the detected result from the coagulation part 6 to a separation part 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a protein separation / recovery device and a protein separation / recovery method for separating and recovering a protein from a stock solution containing the protein.

Conventionally, proteins are coagulated and separated and recovered from a stock solution containing proteins such as decanter juice that is discharged as wastewater when potato starch is produced.
In the protein separation and recovery apparatus that separates and recovers protein from the stock solution in this way, a slurry containing the coagulated protein (first slurry) is obtained by flushing the heated stock solution in a flash tank (depressurized container) to coagulate the protein. In addition, a slurry (second slurry) in which the coagulated protein is aggregated in the aggregation tank is generated and the slurry is temporarily stored. The protein separation / recovery device collects the protein by supplying the slurry stored in the aggregation tank to a decanter (separation unit) for solid-liquid separation.
Japanese Patent No. 3846131

By the way, in the conventional protein separation and recovery apparatus, the supply amount of the stock solution to the flash tank is controlled based on the liquid level position of the slurry in the aggregation tank.
That is, in the conventional protein separation and recovery apparatus, when the liquid level of the slurry in the aggregation tank is lowered, the stock solution corresponding to the amount of drop in the liquid level is supplied to the flash tank.

However, in such a protein separation and recovery device, when the change in the amount of slurry supplied from the flash tank to the flocculation tank per unit time is large, the liquid level of the slurry in the flocculation tank changes drastically. The supply amount of the stock solution also changes drastically.
In particular, when decanter juice discharged as effluent when producing potato starch as the stock solution is used, the slurry generated in the flash tank contains a large amount of bubbles, and the flash volume in the flash tank is The amount of slurry to be changed from the flash tank to the agglomeration tank is likely to change with respect to the amount determined by the internal pressure and temperature conditions. For this reason, the supply amount of slurry per unit time tends to change drastically.

In general, the control of the supply amount of the stock solution to the flash tank uses an air-operated valve or the like with a high response speed. However, even when such a pneumatic valve with a high response speed is used, if the liquid level of the slurry in the flocculation tank changes drastically as described above, the supply amount of the stock solution to the flash tank is flocculated. It is difficult to follow the change in the liquid level of the slurry in the tank.
For this reason, the supply amount of the stock solution to the flash tank fluctuates with respect to the required appropriate amount, and the processing of the stock solution in the flash tank is not stable. That is, the process of coagulating proteins by flushing the stock solution, which is the most important process of the protein separation and recovery apparatus, is not stable.

Further, in the protein separation and recovery apparatus, it is preferable to keep the heating temperature of the stock solution supplied to the flash tank constant for stable treatment in the flash tank.
In the conventional protein separation and recovery device, while the temperature of the stock solution supplied to the flash tank is detected, the stock solution is heated to a constant temperature by feedback control for supplying steam to the stock solution. When the supply amount of the stock solution changes drastically, it becomes difficult to heat the stock solution to a constant temperature.
That is, the temperature of the stock solution supplied to the flash tank is defined by the relative amount of the stock solution and steam. For this reason, when the supply amount of the stock solution to the flash tank changes drastically, it becomes difficult to keep the relative amount of the stock solution and steam constant by feedback control, and it becomes difficult to heat the stock solution to a constant temperature. .
As described above, in the conventional protein separation and recovery apparatus, when the supply amount of the stock solution to the flash tank changes drastically, the temperature of the stock solution supplied to the flash tank cannot be stabilized, and the stock solution is processed in the flash tank. Is not stable. That is, the process of coagulating the protein by flushing the stock solution is not stable.

  The present invention has been made in view of the above-described problems, and in a protein separation and recovery apparatus and a protein separation and recovery method for separating and recovering a protein from a stock solution containing protein, the treatment for coagulating the protein by flushing the stock solution It aims at stabilizing.

  In order to achieve the above object, the protein separation and recovery apparatus of the present invention is supplied with a vacuum container for flushing a heated stock solution containing protein and a first slurry containing a coagulated protein produced in the vacuum container. An aggregating part for aggregating the coagulated protein, a separation part for solid-liquid separation of the second slurry containing the coagulated protein aggregated in the aggregating part, and a heating part for heating the stock solution supplied to the decompression vessel And a stock solution supply means for supplying a constant amount of the stock solution per unit time to the decompression vessel, and a storage amount of the second slurry in the agglomeration section and a detection result. And a slurry supply means for supplying a second amount of the second slurry from the aggregation section to the separation section.

  According to the protein separation and recovery apparatus of the present invention having such a feature, a constant amount of stock solution per unit time is supplied to the decompression container by the stock solution supply means, and the amount of the second slurry stored in the aggregation portion is detected by the slurry supply means. In addition, an amount of the second slurry based on the detection result is supplied to the separation unit.

  In the protein separation and recovery apparatus of the present invention, the slurry supply unit supplies the second slurry from the aggregation unit to the separation unit so that the amount of the second slurry stored in the aggregation unit is constant based on the detection result. A configuration is adopted in which the amount of the second slurry to be determined is determined.

  In the protein separation and recovery apparatus of the present invention, the slurry supply means detects a supply pump that supplies the second slurry from the aggregation unit to the separation unit, and a storage amount of the second slurry in the aggregation unit. In addition, a configuration is adopted that includes a storage amount instruction adjusting unit that drives the supply pump based on the detection result.

  In the protein separation and recovery apparatus of the present invention, the stock solution is a decanter juice that is discharged as waste water when potato starch is produced.

  Next, the protein separation and recovery method of the present invention includes a first slurry generation step of generating a first slurry containing coagulated protein by depressurizing and flushing a heated stock solution containing protein, and the first slurry containing the first slurry. Generating a second slurry by aggregating the coagulated protein contained therein and temporarily storing the second slurry; a solid-liquid separation step for solid-liquid separation of the second slurry; and And a heating step of heating the stock solution to be used in the first slurry generation step, the method comprising the step of supplying a certain amount of the stock solution to the first slurry generation step, and the second slurry generation step. An amount of the second slurry based on the storage amount of the second slurry is subjected to the separation step.

  According to the protein separation and recovery method of the present invention having such characteristics, a constant amount of the stock solution per unit time is provided to the first slurry generation step, and the amount based on the storage amount of the second slurry in the second slurry generation step. The second slurry is subjected to a separation process.

  In the protein separation and recovery method of the present invention, a configuration is adopted in which the amount of the second slurry supplied to the separation step is determined so that the amount of the second slurry stored in the second slurry generation step is constant. To do.

  Further, in the protein separation and recovery method of the present invention, a configuration is adopted in which the stock solution is a decanter juice that is discharged as waste water when potato starch is produced.

According to the protein separation and recovery apparatus of the present invention, a constant amount of stock solution per unit time is supplied to the decompression container by the stock solution supply means, and the amount of the second slurry stored in the aggregation portion is detected by the slurry supply means, and the detection result An amount of the second slurry is supplied to the separation unit.
That is, according to the protein separation and recovery apparatus of the present invention, even when the supply amount of the first slurry supplied from the decompression container per unit time to the agglomeration portion varies greatly, it is always constant for the decompression container. The stock solution is supplied. For this reason, the supply amount of the undiluted solution to the decompression container becomes constant, and the processing in the decompression container can be stabilized. In addition, since the supply amount of the stock solution to the decompression vessel becomes constant, it becomes easy to heat the stock solution to a constant temperature, and this also makes it possible to stabilize the processing in the decompression vessel.
Furthermore, according to the protein separation / recovery device of the present invention, when the supply amount of the first slurry supplied from the decompression container per unit time to the agglomeration part changes greatly, this change amount is the amount of the second slurry to the separation part. Absorbed by supply amount. For this reason, the storage amount of the second slurry in the coagulation unit can be controlled, and the first slurry sent out from the decompression vessel in the coagulation unit can always be received. Therefore, the first slurry is prevented from overflowing in the decompression vessel, and the decompression vessel can always be kept in a processable state.
According to such a protein separation and recovery apparatus of the present invention, it is possible to stabilize the processing in the decompression container and maintain the environment in which the processing in the decompression container can always be performed. Therefore, according to the protein separation and recovery apparatus of the present invention, it is possible to stabilize the treatment for coagulating the protein by flushing the stock solution.

According to the protein separation and recovery method of the present invention, a constant amount of stock solution per unit time is supplied to the first slurry generation step, and an amount of the second slurry based on the amount of the second slurry stored in the second slurry generation step is separated. To be served.
That is, according to the protein separation and recovery method of the present invention, even if the supply amount of the first slurry supplied to the second slurry generation step from the first slurry generation step per unit time greatly changes, A constant stock solution is always provided for the slurry production step. For this reason, the supply amount of the stock solution to the first slurry generation step becomes constant, and the processing in the first slurry generation step can be stabilized. Moreover, since the supply amount of the stock solution to the first slurry generation step becomes constant, it becomes easy to heat the stock solution to a constant temperature, and this also makes it possible to stabilize the processing in the first slurry generation step. .
Furthermore, according to the protein separation method of the present invention, when the supply amount of the first slurry supplied to the second slurry generation step from the first slurry generation step per unit time greatly changes, this change amount is transferred to the separation step. It is absorbed by the supply amount of the second slurry. For this reason, the amount of storage of the second slurry in the second slurry generation step can be controlled, and the first slurry sent out from the first slurry generation step in the second slurry generation step can always be received. Therefore, the first slurry is prevented from overflowing in the first slurry generation step, and the first slurry generation step can be always kept in a processable state.
According to such a protein separation and recovery method of the present invention, it is possible to stabilize the treatment in the first slurry production step and maintain an environment in which the treatment in the first slurry production step can always be performed. Therefore, according to the protein separation and recovery method of the present invention, it is possible to stabilize the treatment for coagulating the protein by flushing the stock solution.

  Hereinafter, an embodiment of a protein separation and recovery apparatus and protein separation and recovery method according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

  FIG. 1 is a flowchart showing a schematic configuration of the protein separation and recovery apparatus of the present embodiment. As shown in this figure, the protein separation and recovery apparatus S1 of the present embodiment includes a stock solution tank 1, a stock solution supply unit 2 (stock solution supply means), a heating unit 3, a jet cooker 4, a flash tank 5 (decompression vessel), and a flocculation tank. 6 (aggregation part), slurry supply part 7 (slurry supply means), and decanter 8 (separation part).

The stock solution tank 1 is a container that temporarily stores a stock solution X supplied from the outside.
The stock solution X stored in the stock solution tank 1 is a liquid containing protein, and in the present embodiment, decanter juice that is discharged as wastewater when potato starch is produced is used.

  The stock solution supply unit 2 sends the stock solution X stored in the stock solution tank 1 to the downstream flash tank 5 side, and in this embodiment, sends a constant amount of the stock solution X to the flash tank side 5 per unit time. . That is, a constant amount of the stock solution X per unit time is supplied to the flash tank 5 by such stock solution supply unit 2.

More specifically, the stock solution supply unit 2 includes a stock solution supply pump 2a for sending the stock solution X from the stock solution tank 1, and a flow rate instruction adjusting unit 2b for controlling the flow rate of the stock solution X sent from the stock solution supply pump 2a to be constant. And. Further, the flow rate instruction adjusting unit 2b includes a flow rate detection sensor 2c for detecting the flow rate of the stock solution X sent from the stock solution supply pump 2a, a valve 2d for passing the stock solution X having a flow rate corresponding to the opening degree, and a flow rate detection sensor 2c. And a flow rate indicating controller 2e for adjusting the opening of the valve 2d based on the detection result.
The stock solution supply unit 2 configured as described above detects the flow rate of the stock solution X sent from the stock solution supply pump 2a by the flow rate detection sensor 2c, and the flow rate indicating controller 2e detects the flow rate of the valve 2d according to the detection result. By adjusting the opening, a constant amount of the stock solution X per unit time is sent to the flash tank 5 side.

The heating unit 3 heats the stock solution X sent from the stock solution supply unit 2 (that is, the stock solution X supplied to the flash tank 5) to a constant temperature with steam Y.
The heating unit 3 includes a steam injector 3a that supplies the steam Y to the stock solution X using the flow of the stock solution X, and a temperature instruction adjustment unit 3b that controls the temperature of the stock solution X to which the steam Y is supplied to be constant. ing. Further, the temperature instruction adjusting unit 3b includes a temperature detection sensor 3c for detecting the temperature of the stock solution X supplied with the steam Y (the stock solution X discharged from the steam injector 3a), and a steam Y having a flow rate corresponding to the opening degree. A valve 3d that passes through the injector 3a and a temperature indicating controller 3e that adjusts the opening of the valve 3d based on the detection result of the temperature detection sensor 3c are provided.
And the heating part 3 comprised in this way detects the temperature of the undiluted solution X discharged | emitted from the steam injector 3a with the temperature detection sensor 3c, and according to this detection result, the temperature indication controller 3e opens the opening degree of valve | bulb 3d. Is adjusted to a constant temperature.

The jet cooker 4 efficiently mixes the stock solution X and the steam Y supplied by the heating unit 3 and supplies the mixture to the flash tank 5.
The stock solution X efficiently mixed with the steam Y by the jet cooker 4 is supplied as a paste to the flash tank 5.

The flash tank 5 is a container whose inside is depressurized. By flushing the heated stock solution X, the protein contained in the stock solution X is coagulated, and a slurry X1 (first slurry) containing the coagulated protein is obtained. Is to be generated.
The flash tank 5 discharges the slurry X1 from below and discharges the vapor Z, which is a vaporized component generated when the slurry X1 is generated, from above to the outside. The vapor Z discharged from the flash tank 5 is reused by heat recovery or the like.

The agglomeration tank 6 is supplied with the slurry X1 produced in the flash tank 5 and produces a slurry X2 (second slurry) containing the agglomerated coagulated protein by agglomerating the coagulated protein in the slurry X1. It is.
The aggregation tank 6 includes a container 6a that is supplied with the slurry X1 and temporarily stores the slurry X2, and an agitation device 6b that aggregates the coagulated protein by agitating the inside of the container 6a.

The slurry supply unit 7 detects the amount of slurry X2 stored in the aggregation tank 6 and supplies the amount of slurry X2 based on the detection result from the aggregation tank 6 to the decanter 8. And in this embodiment, the slurry supply part 7 determines the quantity of the slurry X2 supplied to the decanter 8 from the aggregation tank 6 so that the storage amount of the slurry X2 in the aggregation tank 6 may become fixed.
In the present embodiment, the slurry supply unit 7 performs control by replacing the storage amount of the slurry X2 with the liquid level of the slurry X2. That is, the slurry supply unit 7 detects the level of the slurry X2 in the aggregation tank 6 and supplies an amount of the slurry X2 based on the detection result from the aggregation tank 6 to the decanter 8. Further, the slurry supply unit 7 determines the amount of the slurry X2 supplied from the aggregation tank 6 to the decanter 8 so that the liquid level of the slurry X2 in the aggregation tank 6 is constant.

More specifically, the slurry supply unit 7 detects the liquid level of the slurry X2 in the aggregation tank 6 and the slurry supply pump 7a (supply pump) that supplies the slurry X2 from the aggregation tank 6 to the decanter 8, and the detection result. And a liquid level instruction adjusting unit 7b for driving the slurry supply pump 7a. Further, the liquid level instruction adjusting unit 7b detects a liquid level of the slurry X2 in the aggregation tank 6 and a liquid level instruction for driving the slurry supply pump 7a based on the detection result of the liquid level detection sensor 7c. And a controller 7d.
And the slurry supply part 7 comprised in this way detects the liquid level of the slurry X2 stored in the aggregation tank 6 with the liquid level detection sensor 7c, and the liquid level indication controller 7d responds to this detection result. By driving the slurry supply pump 7a, the liquid level of the slurry X2 in the aggregation tank 6 is controlled to be constant.

  The decanter 8 performs solid-liquid separation on the slurry X2 containing the coagulated protein aggregated in the aggregation tank 6, and discharges the solid component as recovered protein X3 and the liquid component as separated liquid X4.

  Next, the operation (protein separation and recovery method) of the protein separation and recovery apparatus of the present embodiment configured as described above will be described.

First, the stock solution X stored in the stock solution tank 1 is sent out by the stock solution supply unit 2 to the flash tank 5 side at a constant amount per unit time.
More specifically, the stock solution X is sent out by the stock solution supply pump 2a, and the flow rate is detected by the flow rate detection sensor 2c. Then, based on the detection result, the flow rate indicating controller 2e adjusts the opening degree of the valve 2d, and a certain amount of the stock solution X passes through the valve 2d. As a result, the stock solution X is sent out to the flash tank 5 side by a fixed amount.

Subsequently, the stock solution X delivered from the stock solution supply unit 2 is heated to a constant temperature by the heating unit 3 (heating process).
More specifically, the stock solution X is heated by being supplied with steam Y through the steam injector 3a. The temperature of the stock solution X heated by the supply of the steam Y is detected by the temperature detection sensor 3c, and the temperature indication controller 3e adjusts the opening degree of the valve 3d based on the detection result, whereby the stock solution An amount of steam Y that warms X to a constant temperature is supplied to the steam injector 3a. As a result, the stock solution X supplied to the flash tank 5 (used in a first slurry generation step described later) is heated to a constant temperature.

  Here, in the protein separation and recovery apparatus of the present embodiment, the stock solution X sent out from the stock solution supply unit 2 is set to a constant amount. For this reason, it is possible to accurately supply the raw solution X with an amount of steam for heating the raw solution X to a constant temperature, and it is possible to reliably heat the raw solution X to a constant temperature.

  Subsequently, the stock solution X heated by the heating unit 3 is efficiently mixed with the steam Y by the jet cooker 4 to form a paste.

Subsequently, the stock solution X is flushed in the decompressed flash tank 5. As a result, the protein contained in the stock solution X coagulates to produce a slurry X1 containing the coagulated protein (first slurry producing step).
Then, the slurry X1 is discharged from below the flash tank 5. Further, vapor Z, which is a vaporized component generated when the slurry X1 is generated, is discharged from above the flash tank 5.

Here, in the protein separation and recovery apparatus of the present embodiment, a constant amount of the stock solution X is always supplied to the flash tank 5 by sending a constant amount of the stock solution X from the stock solution supply unit 2. That is, a constant stock solution X is always supplied to the first slurry generation step. For this reason, the process in the flash tank 5 (that is, the process in the first slurry generation step) can be stabilized.
Furthermore, in the protein separation and recovery apparatus of the present embodiment as described above, since the stock solution X can be reliably heated to a constant temperature by the heating unit 3, the processing in the flash tank 5 (that is, the first process) It is possible to stabilize the treatment in one slurry generation step.

  Subsequently, the slurry X1 is supplied to the aggregation tank 6. Then, when the coagulated protein contained in the slurry X1 is aggregated, a slurry X2 containing the aggregated coagulated protein is generated (second slurry generating step). The slurry X2 is temporarily stored in the aggregation tank 6.

Subsequently, the slurry X2 stored in the aggregation tank 6 is supplied to the decanter 8 by the slurry supply unit 7 so that the liquid level of the slurry X2 in the aggregation tank 6 is constant.
More specifically, the liquid level of the slurry X2 stored in the agglomeration tank 6 is detected by the liquid level detection sensor 7c, and based on this detection result, the liquid level indicating controller 7d moves the slurry supply pump 7a to the liquid level of the slurry X2. Is driven at a predetermined height. As a result, the slurry X2 is supplied to the decanter 8 so that the liquid level of the slurry X2 in the aggregation tank 6 is constant. That is, the amount of slurry X2 stored in the second slurry generation step is determined to be constant, and the amount of slurry X2 based on the determination is provided to the decanter 8 (a solid-liquid separation step described later).

In the protein separation and recovery apparatus of this embodiment, decanter juice that is discharged as waste water when potato starch is produced as the stock solution X is used. For this reason, the slurry X1 produced | generated in the flash tank 5 contains a lot of air bubbles, and, thereby, the transfer amount of the slurry X1 from the flash tank 5 to the aggregation tank 6 fluctuates greatly per unit time.
On the other hand, in the protein separation and recovery apparatus of the present embodiment, the liquid level of the slurry X2 stored in the aggregation tank 6 is controlled to be constant by the slurry supply unit 7. For this reason, even if the transfer amount of the slurry X1 from the flash tank 5 to the flocculation tank 6 changes greatly, this change amount is absorbed by the supply amount of the slurry X2 to the decanter 8.
Therefore, the storage amount of the slurry X2 in the flocculation tank 6 can be controlled to be constant, and the slurry X1 sent out from the flash tank 5 by the flocculation tank 6 can always be received. Therefore, the slurry X1 is prevented from overflowing in the flash tank 5, and the flash tank 5 can always be kept in a processable state.

  Subsequently, the slurry X2 supplied to the decanter 8 is subjected to solid-liquid separation (solid-liquid separation step). As a result, the slurry X2 is separated into a solid component and a liquid component, the solid component is discharged as the recovered protein X3, and the liquid component is discharged as the separation liquid X4.

According to the protein separation and recovery apparatus of the present embodiment as described above, a constant amount of the stock solution X is supplied to the flash tank 5 by the stock solution supply unit 2 and the slurry supply unit 7 stores the slurry X2 in the aggregation tank 6. The amount of the slurry X2 based on the detection result is supplied to the decanter 8 while the amount is detected.
That is, according to the protein separation and recovery apparatus of the present embodiment, even when the supply amount of the slurry X1 supplied from the flash tank 5 to the aggregation tank 6 per unit time greatly changes, Is always supplied with a constant stock solution X. For this reason, the supply amount of the stock solution X to the flash tank 5 becomes constant, and the processing in the flash tank 5 can be stabilized. Further, since the supply amount of the stock solution X to the flash tank 5 becomes constant, it becomes easy to heat the stock solution X to a constant temperature, and this also makes it possible to stabilize the processing in the flash tank 5.
Furthermore, according to the protein separation and recovery apparatus of the present embodiment, when the supply amount of the slurry X1 supplied from the flash tank 5 to the flocculation tank 6 per unit time greatly changes, this change amount is the slurry X2 to the decanter 8. Absorbed by the amount of supply. For this reason, the storage amount of the slurry X2 in the flocculation tank 6 can be controlled, and the slurry X1 sent out from the flash tank 5 by the flocculation tank 6 can always be received. Therefore, the slurry X1 is prevented from overflowing in the flash tank 5, and the flash tank 5 can always be kept in a processable state.
According to such a protein separation and recovery apparatus of the present embodiment, it is possible to stabilize the processing in the flash tank 5 and maintain an environment in which the processing in the flash tank 5 can always be performed. Therefore, according to the protein separation and recovery apparatus of the present embodiment, it is possible to stabilize the treatment for coagulating the protein by flushing the stock solution X.

Further, according to the protein separation and recovery method of the present embodiment, a constant amount of the stock solution X per unit time is supplied to the first slurry generation step, and an amount of the slurry X2 is separated based on the amount of slurry X2 stored in the second slurry generation step. Provided to the process.
That is, according to the protein separation and recovery method of the present embodiment, even when the supply amount of the first slurry X1 provided to the second slurry generation process from the first slurry generation process per unit time greatly changes, A constant stock solution X is always provided for the first slurry generation step. For this reason, the supply amount of the stock solution X to the first slurry generation step becomes constant, and the processing in the first slurry generation step can be stabilized. In addition, since the supply amount of the stock solution X to the first slurry generation step becomes constant, it becomes easy to heat the stock solution X to a constant temperature, and this can also stabilize the processing in the first slurry generation step. It becomes.
Furthermore, according to the protein separation method of the present embodiment, when the supply amount of the slurry X1 supplied to the second slurry generation step from the first slurry generation step per unit time greatly changes, this change amount is transferred to the separation step. Is absorbed by the supply amount of the slurry X2. For this reason, the storage amount of the slurry X2 in the second slurry generation step can be controlled, and the slurry X1 sent out from the first slurry generation step in the second slurry generation step can always be received. Therefore, the slurry X1 is prevented from overflowing in the first slurry generation step, and the first slurry generation step can be always maintained in a processable state.
According to such a protein separation and recovery method of the present embodiment, it is possible to stabilize the processing in the first slurry generation step and maintain an environment in which the processing in the first slurry generation step can always be performed. Therefore, according to the protein separation and recovery method of the present embodiment, it is possible to stabilize the treatment for coagulating the protein by flushing the stock solution X.

Note that, according to the protein separation and recovery apparatus and protein separation and recovery method of the present embodiment, the amount of the slurry X2 discharged from the aggregation tank 6 (second slurry generation step) varies per unit time. For this reason, there is a concern that the processing time in the decanter 8 varies and the processing efficiency of the decanter decreases.
However, since the process of coagulating the protein is stabilized by flushing the stock solution X, the dehydrating property of the slurry X2 is improved, and the slurry X2 is treated in the same processing time as the conventional protein separation and recovery apparatus and protein separation and recovery method. Solid-liquid separation is possible. Therefore, according to the protein separation and recovery apparatus and the protein separation and recovery method of the present embodiment, the processing efficiency of the decanter is not reduced.

  The preferred embodiments of the protein separation / recovery device and the protein separation / recovery method according to the present invention have been described above with reference to the accompanying drawings. Needless to say, the present invention is not limited to the above-described embodiments. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the said embodiment, the structure which uses the decanter soup discharged | emitted as waste_water | drain when manufacturing potato starch as stock solution X was demonstrated.
However, the present invention is not limited to this, and any liquid containing protein can be used as a stock solution.

Moreover, in the said embodiment, the structure which detects the storage amount of the slurry X2 in the aggregation tank 6 indirectly by detecting the liquid level of the slurry X2 in the aggregation tank 6 was demonstrated.
However, the present invention is not limited to this. For example, the amount of slurry X2 stored in the aggregation tank 6 may be detected by detecting the weight of the slurry X2 in the aggregation tank 6.

Moreover, in the said embodiment, the structure which heats the stock solution X by supplying the steam Y to the stock solution X was demonstrated.
However, the present invention is not limited to this, and the stock solution X may be heated using another heating unit such as a heater.

It is a flowchart which shows schematic structure of the protein isolation | separation collection | recovery apparatus in one Embodiment of this invention.

Explanation of symbols

  S1... Protein separation and recovery device, 1... Stock solution tank, 2... Stock solution supply unit (stock solution supply means), 2a... Stock solution supply pump, 2b. Heating unit, 3a ... Steam injector, 3b ... Temperature indication adjusting unit, 4 ... Jet cooker, 5 ... Flash tank (decompression vessel), 6 ... Coagulation tank (coagulation unit), 7 ... Slurry supply unit ( Slurry supply means), 7a... Slurry supply pump (supply pump), 7b... Liquid level indication adjustment unit (storage amount indication adjustment unit), 8 ... Decanter (separation unit), X ... Stock solution, Y ... Steam , X1 ... slurry (first slurry), X2 ... slurry (second slurry)

Claims (7)

A vacuum container for flushing the heated stock solution containing the protein, a first slurry containing the coagulated protein produced in the vacuum container, and an aggregating part for aggregating the coagulated protein; A protein separation and recovery apparatus comprising: a separation unit that solid-liquid separates the second slurry containing the aggregated coagulated protein; and a heating unit that heats the stock solution supplied to the vacuum vessel,
Stock solution supply means for supplying a constant amount of the stock solution per unit time to the vacuum vessel;
And a slurry supply means for detecting a storage amount of the second slurry in the aggregation unit and supplying an amount of the second slurry based on the detection result from the aggregation unit to the separation unit. Recovery device.   The slurry supply means determines an amount of the second slurry supplied from the aggregation unit to the separation unit so that a storage amount of the second slurry in the aggregation unit is constant based on the detection result. The protein separation and recovery apparatus according to claim 1.   The slurry supply means detects a supply pump for supplying the second slurry from the aggregation unit to the separation unit, a storage amount of the second slurry in the aggregation unit, and controls the supply pump based on the detection result. The protein separation / recovery device according to claim 1, further comprising a storage amount instruction adjusting unit that is driven.   The protein separation / recovery device according to any one of claims 1 to 3, wherein the undiluted solution is decanter juice discharged as wastewater when potato starch is produced. A first slurry generating step for generating a first slurry containing coagulated protein by depressurizing and flushing a heated stock solution containing protein and a second by aggregating the coagulated protein contained in the first slurry. A second slurry generation step for generating a slurry and temporarily storing the second slurry, a solid-liquid separation step for solid-liquid separation of the second slurry, and the stock solution used for the first slurry generation step A method for separating and recovering protein, comprising a heating step of heating,
A protein characterized in that a predetermined amount of the stock solution is provided to the first slurry generation step, and an amount of the second slurry based on a storage amount of the second slurry in the second slurry generation step is provided to the separation step. Separation and recovery method.   6. The protein separation and recovery method according to claim 5, wherein an amount of the second slurry to be provided to the separation step is determined so that a storage amount of the second slurry in the second slurry generation step is constant. The protein separation and recovery method according to claim 5 or 6, wherein the stock solution is a decanter juice discharged as waste water when potato starch is produced.

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