JP4815551B2 - Method for producing shochu concentrate - Google Patents

Description

  The present invention relates to a method for producing a shochu concentrate, and more particularly to a method for producing a concentrate having excellent anticorruption properties of the concentrate.

  In 1993, a number of countries, including Japan, adopted the London Convention (the Convention on the Prevention of Marine Pollution from Waste and Other Disposals). Shochu is currently recognized as an exempted item from the Convention, but as a matter of fact, it is difficult to continue the conventional ocean dumping as it is, and efforts in the shochu industry are aimed at the total disposal of land. Has been made.

  Shochu usually contains moisture and solids, and moisture is contained in an amount of 90% by weight or more. The solids contain a large amount of protein, starch, fiber, and the like.

  Although incineration is also conceivable as an onshore treatment of such shochu, it is not a preferable method because incineration facilities and fuel costs increase.

  For this reason, in recent years, Patent Documents 1 and 2 have proposed methods for producing feed, focusing on the components of shochu.

  The technique described in Patent Document 1 separates shochu into a liquid component and a solid component, and after adjusting the suspended matter of the liquid component to 100 (g / l) or less, the liquid component and the solid component are separated separately. And then mixing the dried product of liquid and the dried product of solid, and a method for producing a feed obtained from shochu.

The technique described in Patent Document 2 separates the shochu distillation residue liquid into solid and liquid, concentrates the separated liquid to extract a concentrated liquid having a water content of 65% to 80%, This is a method for producing a wet type feed by mixing mixed raw materials at a predetermined ratio.
Japanese Patent No. 3495429 Japanese Patent No. 2976072

  In the technique described in Patent Document 1, the separated liquid after solid-liquid separation usually contains about 95% of water, and it takes a considerable amount of time to dry it, and the fuel cost is high. Furthermore, there is a drawback that the unsaturated fatty acid is oxidized by the drying treatment, and the quality as a feed is greatly reduced.

  The technique of Patent Document 2 can be manufactured at a lower cost than the technique of Patent Document 1 and has an effect of preventing quality deterioration due to drying. However, when this concentrated liquid is used as an additive for making a feed, However, there is a drawback that the feed rot is deteriorated over time and the feed storage stability is poor. This is due to the fact that the concentrate decays early.

  Then, the subject of this invention makes it a subject to provide the manufacturing method of the concentrate which is excellent in anti-corruption property.

  The other subject of this invention becomes clear by the following description.

  The above problems are solved by the following inventions.

(Claim 1)
In the method of producing a concentrated liquid by separating the shochu from a solid-liquid separation facility and then concentrating the filtrate with a concentration facility ,
A method for producing a shochu concentrate, wherein the total concentration of citric acid, malic acid, succinic acid, lactic acid and acetic acid contained in the concentrate is 3.0% or more and 10% or less.

(Claim 2)
The method for producing a shochu concentrate according to claim 1, wherein the total concentration of acids contained in the concentrate is 3.4% or more and 10% or less.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the concentrate which is excellent in anti-corrosion property can be provided.

  The method for producing a concentrated liquid according to the present invention is characterized in that shochu is separated into solid and liquid, and the separated liquid is concentrated so that the total concentration of acids contained in the concentrated liquid is 3.0% or more. And

  Usually, the concentrated solution will rot in a few days. However, the present invention concentrates the solid-liquid separation solution and the acid (citric acid, malic acid, succinic acid, lactic acid, acetic acid) contained in the concentrated solution. When the total of the respective concentrations of) is set to 3.0% or more, the effect of preventing decay over a long period is exhibited. For example, when this is used as an additive for feed, the feed does not rot and exhibits the effect of excellent feed storage stability. Even if the solid-liquid separation liquid is concentrated, if the total concentration of each acid is less than 3.0%, the anti-corruption effect is inferior, and the problem of poor feed storability when added to livestock feed is not solved.

  Furthermore, in the present invention, it is preferable to concentrate the total concentration of acids contained in the concentrated liquid to 3.4% or more in order to exhibit an effect of better anti-corruption.

  An example of the manufacturing method of the concentrate which concerns on this invention is demonstrated based on attached drawing.

  FIG. 1 is a flow chart showing an example of shochu processing including the method for producing a concentrate according to the present invention.

  As shown in FIG. 1, shochu is carried into a processing facility by a tank lorry, for example, and stored in a stock solution storage tank 1. The stock solution storage tank 1 incorporates, for example, a steam coil to prevent corruption, and the temperature in the tank is maintained at 60 to 80 ° C. The stock solution storage tank 1 is preferably provided with a stirrer (not shown) to prevent sedimentation of solids.

  The shochu (hereinafter also referred to as stock solution) carried into the stock solution storage tank 1 has a solid content concentration in the range of about 6 to 10% by weight and an ethanol concentration in the range of about 0.3 to 0.8% by weight. .

  The stock solution stored in the stock solution storage tank 1 is sent to the solid-liquid separation facility 2 by a pump (not shown) and separated into solid and liquid.

  A rotary screen and a screw press can be used as the solid-liquid separation facility 2, and the stock solution is separated into a dehydrated cake (solid content) and a filtrate in the solid-liquid separation facility 2.

  According to a preferred embodiment of the present invention, the solid content and the water content in the shochu are separated on a rotary screen and dehydrated to a water concentration of about 70% by a screw press.

  The filtrate is sent to the concentration facility 3, and the dehydrated cake is sent to the drying facility 7.

  The solid-liquid separation facility 2 is preferably cleaned periodically to prevent clogging, and is washed with caustic soda after being operated for a certain period of time depending on the operating conditions. This chemical cleaning is preferably configured to be an automatic cleaning system.

  For example, a clogging condition is detected automatically by creating a sequence program that detects the amount of filtrate reduction, operates the caustic soda supply equipment using the detection signal as a trigger, performs a cleaning operation for a certain period of time, and then stops the operation. Driving is possible.

  When shipping as a concentrated product as a product, it is also preferable to add a centrifuge in order to make the concentrated liquid properties more fluid.

  The filtrate separated by the solid-liquid separation facility 2 is supplied to the concentration facility 3, and the filtrate sent to the concentration facility 3 is heated with steam to evaporate the water in the filtrate, and the total solids (TS ) Concentrate to a concentration of about 35 wt% or more, preferably 40 wt% or more.

  The present invention is characterized in that the total concentration of acids contained in the concentrate is 3.0% or more, and preferably 3.4% or more. Thereby, as above-mentioned, decay of a concentrate is prevented over a long period of time, and even if it uses it as an additive of feed, a feed does not decay and the effect which is excellent in feed storage stability is exhibited.

  The upper limit of the total concentration of acids contained in the concentrate is preferably 10% or less.

  Although it does not specifically limit as the concentration equipment 3, An evaporating can etc. can be used, for example, employ | adopting a triple effect can (triple effect system) is preferable when improving separation efficiency. As the evaporator, a spray type can be preferably used.

  Below, an example of the concentration equipment 3 preferable in this invention is demonstrated.

  FIG. 2 is an overall configuration diagram showing an example of a concentration facility 3 using a spray evaporator, and FIG. 3 is a cross-sectional view of a main part showing a cyclone portion of the spray evaporator.

  The concentration facility 3 includes an evaporator 32 having a spray nozzle 31 therein, a pump 33 that pressurizes the separation liquid supplied to the bottom 32a of the evaporator 32 to be discharged from the spray nozzle 31, and the pump 33 A concentrated liquid is discharged by a measurement signal of a heater 34 disposed between the spray nozzle 31 and heating the separated liquid in the pipe and a concentration controller 35 installed between the pump 33 and the heater 34. A discharge mechanism 36 is provided.

  The inside of the evaporator 32 communicates with a vacuum pump (not shown), and the pressure is reduced by this vacuum pump. In the evaporator 32, the separation liquid supplied from the solid-liquid separation facility 2 is stored in the bottom part 32 a having a small diameter, and a spray box 321 is attached in the can diameter tangential direction of the large diameter body part. As shown in FIG. 3, the spray box 321 is composed of a straight pipe part 321 a having a built-in spray nozzle 31 and a curved pipe part 321 b opened in the tangential direction of the evaporator 32. Therefore, the separated liquid sprayed by the spray nozzle 31 in the straight pipe portion 321a evaporates and then is introduced from the curved pipe portion 321b into the body of the evaporator 32 from the tangential direction.

  The top of the evaporator 32 communicates with a drain treatment facility 5 described later, and moisture evaporated from the top is condensed in the drain treatment facility 5.

  The heater 34 is supplied with steam as a heating source, is supplied with the separation liquid in the bottom 32a of the evaporator 32 by the pump 33, and heats the separation liquid to heat the separation liquid. For example, by setting the steam temperature supplied to the heater 34 to 80 ° C., the 55 ° C. separation liquid is heated to 70 ° C. Condensed water after the steam heats and condenses the separated liquid is discharged from the heater 34 to the outside.

  The discharge mechanism 36 is disposed between the pump 33 and the heater 34. When the detection result by the concentration controller 35 reaches a predetermined concentration, the control valve 361 is opened and the concentrated liquid is discharged by the discharge pump 362. To do.

  In the concentration facility 3, the separated liquid stored in the bottom 32 a of the evaporator 32 whose pressure is reduced to a predetermined degree of vacuum by a vacuum pump is forcibly circulated in the order of the pump 33, the heater 34, the spray nozzle 31, and the spray box 321. At the same time, steam is supplied to the heater 34.

  The separated liquid circulated by the pump 33 is heated by the heater 34 and then introduced from the spray nozzle 31 into the cylinder of the evaporator 32 in a depressurized state from the tangential direction and sprayed. The sprayed separated liquid is promoted to gas-liquid separation by the cyclone effect, the vapor is discharged from the top of the evaporator 32, and the concentrated liquid is stored in the bottom 32a of the evaporator 32 to have a predetermined concentration. Until the above, the above operation is repeated.

  When the liquid concentration in the evaporator 32 reaches a predetermined concentration, the concentration controller 35 generates a signal, the control valve 361 is opened, and the concentrated liquid is discharged to the outside.

  If scaling or the like occurs in the evaporator 32 in the concentration facility 3, the concentration efficiency is lowered. Therefore, it is preferable to perform daily washing with warm water. This washing operation is pre-programmed as part of the concentration process and is preferably performed in a fully automatic operation. The washing effluent is returned to the stock solution storage tank 1 and is washed with caustic soda after being operated for a certain period of time according to the operating conditions.

  The concentrated liquid is stored in the concentrated liquid storage tank 4 and is carried out to the outside by a tank lorry or the like. Specifically, the concentrated liquid is sold to a feed manufacturing company as a liquid feed material. Such sales are possible because, as described above, the total acid concentration of the acids contained in the concentrate is 3.0% or more, so that it has excellent anti-corruption properties and can be used as a feed additive. This is because it does not rot and exhibits the effect of excellent feed preservation.

  The evaporated vapor generated in the concentration facility 3 is condensed by the drain treatment facility 5 to become concentrated drain. The drain treatment facility 5 is a condenser and includes a drain treatment tower. For example, cooling water is used as a refrigerant for cooling the evaporated vapor, and heat is exchanged between the vapor and the cooling water to condense the vapor. The thermal contact with the cooling water is preferably performed in the process leading to the drain treatment tower in order to efficiently perform the condensation.

  Since the obtained concentrated drain has a high BOD concentration, alcohol (ethanol), which is a main factor of BOD, is distilled and collected in a drain treatment tower.

  About 70 wt% ethanol solution is recovered from the top of the drain treatment tower and can be used as fuel for boiler equipment, and the amount of fuel used can be reduced.

  From the bottom of the drain treatment tower, waste liquid with an ethanol concentration of about 150 to 300 mg / l is generated, and this waste liquid is sent to the waste water treatment facility 6 for processing.

  The effluent from the drain treatment facility 5, deodorized effluent, each washing effluent, and the like are microbially treated into water quality that can be discharged into the river. By adopting the membrane separation activated sludge method, space saving and good treated water can be obtained.

  When there is a public sewer near the facility, it is possible to make the water quality that can be discharged directly with only the drain treatment facility, and the wastewater treatment facility can be omitted.

  In another preferred embodiment of the present invention, the concentrated liquid can be further dried and sold to a feed sales company as a dried product. In order to manufacture such a dried product, the concentrated solution is sent to the drying equipment 7 and dried.

  The drying equipment 7 is not particularly limited, but it is preferable to use, for example, a swirling airflow drying device.

  The drying equipment 7 is supplied with the dehydrated cake from the solid-liquid separation equipment 2 and the concentrated liquid from the concentration equipment 3, and these are mixed, and the mixture is dispersed and introduced into a flow of high-temperature air. Dry to a moisture concentration of 12 wt% or less.

  The air heating source preferably uses steam.

  The dried product is stored in a dried product stock tank (not shown) and carried out of the field, and sold, for example, as a dried product to a feed sales company.

  When the exhaust gas generated in the drying equipment 7 contains an odor component, it is sent to a deodorizing equipment (not shown) provided as necessary and deodorized.

  Since the exhaust from the drying facility contains a large amount of acetaldehyde, it is discharged to the atmosphere after odor removal by a deodorizing scrubber.

  In the present invention, the wastewater treatment facility 6 described above is mixed with the effluent from the drainage treatment facility 5, the deodorized wastewater, each washing wastewater, etc., and microbially treated so that the water quality can be discharged into the river. In addition, by adopting the membrane separation activated sludge method, space saving and good treated water can be obtained.

  The concentrated liquid obtained as described above is blended with ingredients that serve as nutrient sources such as fiber raw materials, protein raw materials, cereals, minerals, vitamins, etc., and feeds such as livestock can be produced using ordinary mixing means. .

  The obtained feed does not rot, and exhibits an effect of excellent feed storage stability.

  Hereinafter, the effects of the present invention will be illustrated by examples.

Example 1
After the shochu produced in the Kyushu shochu and barley shochu manufacturing company was subjected to solid-liquid separation using a solid-liquid separation facility, the filtrate was concentrated using a concentrating facility to obtain a concentrated solution 1.

  As the solid-liquid separation equipment, a screw press (mesh width 1.0 mm) and a decanter (3000 G) were used in series.

  As the concentration facility, a concentration facility using a spray evaporator was used, and a concentrated liquid 1 having a solid content concentration of 40 wt% was obtained.

(Analysis and evaluation)
1. Each acid concentration of acids (citric acid, malic acid, succinic acid, lactic acid, acetic acid) contained in the concentrate 1 was analyzed by high performance liquid chromatography. The analysis results and the total of each acid concentration are shown in Table 1.

  2. The concentrate 1 was allowed to stand and the state of decay was examined. The degree of decay due to the number of days left was examined by sensory test. The evaluation criteria were as follows. The results are shown in Table 1.

◎: Rot odor does not occur even after 6 months or more ○: Rot odor does not occur after 2 months or more

Example 2
In the same manner as in Example 1, a concentrated liquid 2 having a solid content concentration of 35 wt% was obtained.

  The obtained concentrated liquid 2 was analyzed and evaluated in the same manner as in Example 1. The analysis results and evaluation results are shown in Table 1.

Comparative Example 1
In the same manner as in Example 1, a concentrated liquid 3 having a solid content concentration of 30 wt% was obtained.

  The obtained concentrated liquid 3 was analyzed and evaluated in the same manner as in Example 1. The analysis results and evaluation results are shown in Table 1.

Comparative Example 2
In the same manner as in Example 1, a concentrate 4 having a solid content concentration of 20 wt% was obtained.

  The obtained concentrated liquid 4 was analyzed and evaluated in the same manner as in Example 1. The analysis results and evaluation results are shown in Table 1.

Example 3
Except that the shochu liquor in Example 1 was replaced with the shochu liquor produced at a rice shochu manufacturing company in Kyushu, a concentrated solution 5 having a solid content concentration of 40 wt% was produced and similarly analyzed and evaluated. . Each analysis result and evaluation result are shown in Table 2.

Example 4
In the same manner as in Example 3, a concentrated solution 6 having a solid content concentration of 35 wt% was produced, and similarly analyzed and evaluated. Each analysis result and evaluation result are shown in Table 2.

Comparative Example 3
In the same manner as in Example 3, a concentrated liquid 7 having a solid content concentration of 30 wt% was produced, and similarly analyzed and evaluated. Each analysis result and evaluation result are shown in Table 2.

Comparative Example 4
In the same manner as in Example 3, a concentrated liquid 7 having a solid content concentration of 20 wt% was produced, and similarly analyzed and evaluated. Each analysis result and evaluation result are shown in Table 2.

The flowchart which shows an example of the process of the shochu containing the manufacturing method of the concentrate which concerns on this invention Overall configuration diagram showing an example of concentration equipment using a spray-type evaporator Cross section of the main part showing the cyclone part of a spray evaporator

Explanation of symbols

1: Stock solution storage tank 2: Solid-liquid separation equipment 3: Concentration equipment 4: Concentrated liquid storage tank 5: Drain treatment equipment 6: Wastewater treatment equipment 7: Drying equipment

Claims (2)

In the method of producing a concentrated liquid by separating the shochu from a solid-liquid separation facility and then concentrating the filtrate with a concentration facility ,
A method for producing a shochu concentrate, wherein the total concentration of citric acid, malic acid, succinic acid, lactic acid and acetic acid contained in the concentrate is 3.0% or more and 10% or less. The method for producing a shochu concentrate according to claim 1, wherein the total concentration of acids contained in the concentrate is 3.4% or more and 10% or less.

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