JPH09313161A - Filtration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the filtration delay in a filtering process for a mash when producing a fermented liquor to be produced by using a raw material containing a larger amount of starchy substances than that of a malt. SOLUTION: When clogging is caused in a brewer's grain layer in a filtering process for a mash at the time of producing a fermented liquor such as a sparkling wine by reducing the amount of a malt used than that of other starchy raw materials, a step for breaking the brewer's grain layer is introduced thereinto. A filtrate is returned to a filtration tank while turbidity is caused in the filtrate by the breaking operation. The filtrate is recovered when the turbidity is eliminated. The brewer's grain layer is destroyed by lowering and using brewer's grain takeout scrapers 6.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a technique for producing fermented liquor produced by using malt and starch, such as rice, corn grits and corn starch, as an auxiliary raw material, and is formed by saccharifying malt and the raw material for the starch. The present invention relates to a filtration method for purifying a saccharified solution from a maichet.

[0002]

2. Description of the Related Art The production of fermented alcoholic beverages such as beer and low-malt beer produced by using starch raw materials such as malt and rice, corn grits, and cornstarch, first comprises malt and rice, wheat, which are auxiliary raw materials, in a charging step. Mixing with starch raw materials such as cornstarch and keeping it in warm water at an appropriate temperature for an appropriate time, the starch raw material is saccharified by the action of malt enzyme to form a saccharified solution, and the mash is filtered to clean it. This is done by obtaining a simple filtrate.

FIG. 1 shows a schematic view of a filtering device for filtering this maichet. The filtering device 1 has a cylindrical tank 2 made of stainless steel, and a stainless steel filter net 4 is provided in the tank 2 near the tank bottom surface 3. The tank 2 is also a delaminator 5
Also, a scraper 6 is provided. The delaminator 5 is
The rotating shaft 7 and a horizontal bar 8 supported by the rotating shaft 7 are provided, and a plurality of delaminating plates 9 are fixed to the horizontal bar 8. The horizontal bar 8 supported by the rotary shaft 7 of the delaminator 5 is configured to be movable in the vertical direction indicated by the arrow (A) by a cylinder mechanism (not shown), and the horizontal bar 8 is moved during filtration.
To a lower position (indicated by a solid line in the figure) or gradually lowering toward the lower part of the tank 2 and slowly rotating to remove the malt hulls etc. formed on the stirring and filter nets of the Mayche. Filtration is performed while forming a cut in the cake layer with the delamination plate 9 (hereinafter referred to as "delamination"). When the delaminator 5 is not used, it is lifted to the upper position shown by the chain line in the figure.

The meal scraping scraper 6 is composed of a spatula-like member, and is used to remove a meal layer such as malt hulls accumulated on the filter net 4 in the process of filtering the Mayche. Supported by 10. In this link mechanism 10, the operating rod 11 has a driving piston 1
It is fixed at 2, and is driven in the directions of arrows (B)-(C) in the figure. Then, when the operating rod 11 is driven by the piston 12 in the direction of the arrow (C), the dreg scraper 6 is rotated as shown by the arrow (D) in the drawing to rise to the position of the horizontal bar 8. ing.
When the lees layer is removed using the lees scraper 6, the piston 12 is driven to move it below the solid line position shown in the figure, and in that state the horizontal bar 8 is rotated to destroy the entire lees layer. At the same time, collect the destroyed meal at the planned place. The meal collected by the meal scraping scraper 6 is taken out from the take-out port (not shown) of the tank 2.

The bottom of the tank 2 is provided with a plurality of discharge ports 13 for collecting the filtrate and a discharge pipe 14 communicating therewith, and the discharge pipe 14 is provided with a pump 16.
A reflux pipe 15 communicating with the tank 2 is connected to the discharge pipe 14 so that the filtrate can be returned to the filtration tank again by operating the shut-off valves 17 and 18, if necessary. The pump 16 feeds the filtered liquid discharged from the tank 2 to the next step and recirculates it to the filtering tank.

Further, in the filtering device 1, a pressure gauge 23 for measuring the pressure inside each of the chamber above the filtering net 4 and the chamber below the filtering net 4 divided by the filtering net 4,
24 is attached, and the filtration status is monitored based on the measured value of the difference between the pressure gauges.

Next, using the filtering device 1 having the above-mentioned configuration,
The step of filtering the mash of the saccharified liquid obtained by mixing the malt and the starch raw material will be described. First, as shown in FIG. 2, while the filtration is started, the delamination machine 5 is gradually lowered downward, and at the same time, the delamination plate 9 is rotated by slowly rotating the horizontal bar 8 to stir the mash. And the delamination plate 9 on the lees layer such as malt hulls formed on the filtration net 4
Filtration is performed while delamination is carried out. During normal filtration,
The lees scraper 6 is housed in the upper position.

The filtrate (saccharified liquid) that has reached the bottom surface 3 of the tank through the filtration net 4 is discharged to the tank 2 by the discharge pipe 14 as shown in FIG.
Taken out. Then, according to the progress of filtration, the filter net 4
On the top, malt shells, heat-coagulated protein, malt, and other cakes such as fine solids obtained from raw materials used are accumulated to form a cake layer 21. In addition, this lees layer 21 has a filtering function substantially. That is, the malt hulls have a very high porosity, and other fine meals are captured in the voids, which enables good filtration. In addition, the delaminator 5 makes a cut in the cake layer, so that the cake is trapped in the upper voids of the wheat layer as the filtration progresses, causing clogging and early deterioration of the filtration capacity. Avoid defects.

[0009]

However, in fermented alcoholic beverages produced by using malt as a raw material, for example, as in Happoshu, the malt usage is less than half that of other raw materials (rice, corn grits, corn starch, etc.). For things (especially in the classification under the Liquor Tax Law, "malt use ratio is less than 25%")
Happo liquor), during filtration, the lees layer becomes thinner in proportion to the malt raw material ratio and other raw materials increase, and the malt layer, which is the layer of malt hulls, immediately becomes clogged and There is a problem that the filtration congestion occurs and the filtration time significantly increases. This situation cannot be solved by the demolition of the cake layer due to the action of the delamination machine described above. And, if this is extremely high, there is a risk that filtration cannot be performed during filtration.

[0010]

Means for Solving the Problems The present invention solves the above-mentioned problems of filtration. In the production of fermented liquor using malt as a raw material, the malt use agent is another starch raw material (rice, corn grits, corn starch). Etc.),
In the Mayche filtration step using a filtration device, when the filtration efficiency is reduced to a predetermined level, that is, when it is determined that there is filtration congestion, the entire lees layer formed on the filtration net is once destroyed, and It is characterized in that the filtrate that has become turbid due to the breaking operation is refluxed to the filtration device, and the collection of the filtrate is restarted when the turbidity of the filtrate is resolved.

According to the present invention, in the Mayche filtration step in the production of fermented liquor with a small amount of malt used, when filtration congestion occurs, the cake efficiency can be restored by destroying the cake layer. Then, by returning the filtrate generated by the destruction of the whole cake layer to the filtration tank, it is possible to eliminate the influence of the turbidity of the filtrate generated by the destruction of the entire cake tank. By destroying the whole cake layer in the filtration step, the congestion of filtration is eliminated and the filtration time is shortened.

According to the present invention, even when the filtration is carried out while the delamination machine is operated after the start of the filtration, the above-mentioned operation of destroying the whole cake layer is carried out when the filtration congestion occurs. As described above, by the action of the delaminator during filtration, it is possible to prevent early filtration congestion, but when using a raw material with less malt, the wheat layer is likely to be clogged and the delaminator is used. It is difficult to destroy the whole cake layer only by the action of. Therefore, by performing destruction of the entire cake layer separately from the delamination operation, more efficient filtration becomes possible.

The operation of breaking or loosening the lees layer in the present invention can be carried out by using the lees scraper of the filtration device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the filtration method according to the present invention will be described with reference to FIGS.
7. Note that FIG. 7 is a block diagram illustrating the function of the control device 30 that controls the filtration device 1 that implements the method of the present invention.

The filtration method of the present invention comprises malt and rice, wheat,
It is applied to fermented liquor produced using starch raw materials such as cornstarch, which uses less malt than other raw materials. An example applied when applied to manufacturing will be described.

[0016] Maiche produced from starch and raw materials such as malt and rice, corn grits and corn starch is
It is supplied to the above-described filtering device 1 and filtered by the method described in FIGS. Immediately after the start of filtration, the filtration is performed while lowering the delaminator 5 to the lower limit level and slowly stirring the Maichet 20 by the delamination plate 9.

During the filtration, the pressure gauge 23 described above is used.
Based on the measured values of 24 and 24, the control device 30 always determines the pressure difference between the pressure on the filtered side of the upper mesh and the cake layer of the filtration net 4 and the pressure on the filtration side of the saccharified liquid discharge below the filtration net 4. It is monitored and thus the status of filtration is monitored. Control device 3
When the difference between the pressure in the upper area and the pressure in the lower area of the filter net 4 is within the normal range, it is determined that the filtration is normally performed. However, when the pressure difference is equal to or higher than a predetermined level, as described above, it is determined that a filtration congestion occurs because clogging occurs between the wheat layers that are lees and filtration efficiency is reduced, Move to the following operation.

When the filtration efficiency drops to a predetermined level, the control device 30 operates the piston 12 to lower the lees scraper 6 to the lower position, as shown in FIG. The lees scraper 6 descends and enters the lees layer 21. In this state, the horizontal bar 8 supporting the lees scraper 6 is slowly rotated. The meal layer 21 in a state where the differential pressure reaches the upper limit is hard, and it is usually difficult to loosen it depending on the delamination plate 9 of the delaminator 5. However, by using the lees scraper 6,
It becomes possible to destroy the meal layer 21.

The rotation of the lees scraper 6 is carried out by the filtration net 4
It suffices to sweep the upper surface once over substantially the entire surface. In this example, the scraper 6 is supported on the left and right of the horizontal bar 8 about the rotation shaft 7, and the horizontal bar 8 is rotated 180 degrees. do it. The rotation of the lees scraper 6 is performed at a slow speed of about 1 rotation in about 12 minutes. When the horizontal bar 8 of the delaminating machine 5 is slowly rotated with the lees scraper 6 being lowered, the lees layer 21 accumulated on the filter net 4 and clogged as shown in FIG. Destroyed by 6.

When the lees scraper 6 has substantially rotated once, the control device 30 operates the piston 12 again to return the lees scraper 6 to the upper position as shown in FIG. Since the wheat layer that has reached the upper limit of the differential pressure is hard as described above, when the wheat layer is stirred with the lees scraper 6, the wheat layer is moved in a lump to some extent, but is broken and loosened. As a result of being stirred by the stirring rod 9, the clogging between the wheat layers of the cake layer 21 is eliminated, the wheat layer is formed again, and smooth filtration is performed.

When the lees layer is destroyed by the lees scraper 6, turbidity occurs in the filtrate, so at the time when the lees layer scraping operation by the lees scraper 6 starts, the outlet valve 18 of the discharge pipe 14 is controlled by a controller. It is automatically closed by 30, and the valve 17 of the reflux pipe 15 is opened. As a result, the filtrate is not taken out as it is, but returned to the tank 2 through the reflux pipe 15 and circulated until the turbidity disappears (see FIG. 6).

The turbidity meter 25 attached to the discharge pipe 14 constantly monitors the degree of turbidity of the filtered liquid that has passed through the filter net 4, and the filtered liquid is circulated until the turbidity is resolved. When the turbidity of the filtrate becomes equal to or lower than a predetermined level and becomes stable, the control device 30 closes the valve 17 of the reflux pipe 15 and opens the take-out valve 18 again, and returns to the normal filtration process. In this example, the turbidity of the filtrate can be reduced to 300 ppm or less by repeatedly circulating it for about 2 minutes.

[0023]

[Examples] Next, an example is shown in which the production of Happoshu using malt and starches such as rice, corn grits and corn starch as raw materials was taken as an example. Table 1 shows that in the production of Happoshu with a malt content of 24% by weight, the Maichet was filtered using the filtration method according to the present invention (after improvement) and a conventional method not used (before improvement). The experimental result which compared with the case where it carried out by the method for filtration time and turbidity is shown. In addition, in the present example, as in the case of wort filtration of normal beer, Maicher's filtration is performed to obtain a first filtrate (first wort in the case of beer), and the lees in the tank are refreshed. By washing with water and filtering this, the extract remaining in the lees was extracted as a second filtrate (second wort in the case of beer). In each of the steps of the first and second filtrates, the entire cake layer was destroyed once. In addition, you may perform this destruction operation multiple times as needed in each process.

[0024]

[Table 1]

As can be seen from the results in Table 1, the total filtration time was 240 to 270 minutes before the improvement, and 170 minutes to 190 minutes after the improvement. It was shortened. In addition, in the case of normal beer with a malt usage of 67% or more, the total filtration time of the first wort filtration and the second wort filtration is about 150 to 180 minutes. Shortening the filtration time is effective.

[0026]

As described above, according to the filtration method of the present invention, when fermented liquor is produced by using more starch raw materials such as rice, wheat and cornstarch than malt, filtration congestion occurs in the Maichet filtration step. Even if it happens, quickly eliminate the filtration congestion,
Since the filtration can be completed in almost the same filtration time as fermented liquor such as beer using a large amount of malt, it is possible to efficiently produce fermented liquor.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a filtration device used in a filtration method of the present invention.

FIG. 2 is a diagram showing a normal filtration state of a filtration device.

[Fig. 3] Fig. 3 is a diagram illustrating a process of filtering a maiche.

FIG. 4 is a diagram illustrating an operation of destroying a cake layer.

FIG. 5 is a diagram illustrating a manner in which a meal layer is destroyed.

FIG. 6 is an explanatory diagram of a case where a filtrate is circulated.

FIG. 7 is a block diagram illustrating a function of a control device of the filtration device used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration device 2 Tank 3 Bottom of tank 4 Filtration net 5 Delamination machine 6 Debris scraper 7 Rotating shaft 9 Delamination plate 10 Link 11 Operation rod 12 Piston 13 Discharge port 14 Discharge pipe 15 Reflux pipe 16 Pump 17, 18 Valve 20 Maisher 21 cake layer 23, 24 pressure gauge 25 turbidity meter 30 controller

Claims (3)

[Claims] 1. A filtration method comprising saccharifying malt and an auxiliary material, which is used in a larger amount than malt, to form a mash, and supplying the mash to a filtering device to collect a filtrate, after the start of filtration. When the filtration efficiency is lowered to a predetermined level, the whole layer of the lees accumulated on the filter net provided at the bottom of the filtration device is destroyed, and the cloudy filtrate returned by the destruction operation is returned to the filtration device. The filtration method is characterized in that collection of the filtrate is restarted when the turbidity of the solution is resolved. 2. A filtration method comprising saccharifying malt and an auxiliary material used in a larger amount than malt to form a maichet, and supplying the maichet to a filtration device to collect a filtrate, after starting filtration. Performing filtration while stirring the mash in the filtration device, and when the filtration efficiency drops to a predetermined level, destroy the entire layer of lees accumulated on the filter net provided at the bottom of the filtration device, and by this destruction operation A filtration method, wherein the cloudy filtrate is returned to the filtration device, and collection of the filtrate is restarted when the cloudiness of the filtrate is resolved. 3. The filtration method according to claim 1, wherein the operation of destroying the layer of lees is performed by using a lees scraper of a filtration device.