JP2008188520A - Concentration method of distillation waste liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To concentrate a distillation waste liquid to a level that can be used as a raw material of mixed feed and maintain the nutritional value of the distillation waste liquid. <P>SOLUTION: After addition of oils and fats for feed, concentration is carried out by using a triple-effect concentrator at ≤80°C in a steam atmosphere, thereby the fluidity of concentrated waste liquor of Shochu residue remains even when concentrated until its water content reaches about 40 wt.%. When the concentrated waste liquor of Shochu residue is added to feed so that the nutritional values of proteins, sugars, lipids, vitamins and the like may not be impaired, the oxidation resistance of meat is increased to decrease the amount of a leaked meat juice, and the taste of meat can be improved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for concentrating distilled waste liquid, and more particularly to a technique suitable for use in converting distilled concentrated waste liquid into feed.

  In recent years, the amount of shochu produced has increased dramatically, and a huge amount of shochu has been discharged. Conventionally, the treatment of shochu has been easily solved by dumping into the ocean, but in recent years, legal regulations have become stricter due to environmental considerations and the like, and treatment on land has been forced.

  As a method of treating shochu, there is a method of treating shochu using chicken (broiler, laying hen), pig, or cattle mixed feed, and many shochu processing plants have already been constructed. . In order to turn shochu into feed, first, the shochu is separated into a solid portion and a liquid portion by a solid-liquid separation method. The solid part contains many organic components and can be used as it is.

  On the other hand, regarding the liquid part, the shochu waste liquid is currently discarded after its water content is concentrated to about 70 wt%. When trying to concentrate more than that, the viscosity of the shochu-concentrated waste liquor increases rapidly and the fluidity is lost. On the other hand, since many organic components are contained in the liquid part, various studies for using the liquid part (hereinafter referred to as shochu waste liquid) for feed have been conducted.

  Shochu waste liquid contains a large amount of protein, NFE (carbohydrate) and the like, and further contains a large amount of polyphenol. If shochu-concentrated waste liquid can be added to the feed, it is possible to suppress the deterioration of flavor and reduce the drip loss by imparting antioxidant properties to the meat and suppressing the oxidation of fat. Therefore, it can be used as a mixed feed material having functionality. Similarly, not only shochu, but also distillers (including shochu) produced by the production of whiskey, brandy, or bioethanol, if the liquid part is separated by the solid separation method, If it contains a lot of protein, NFE (carbohydrate), etc., and the distilled concentrated waste liquid can be added to the feed, it can be used as it is.

  However, when a distilled and concentrated waste liquid having a water content of about 70 wt% is added to the feed, the water content of the whole feed rises and the feed tends to harden. For example, if 3% by weight of distilled concentrated waste liquid concentrated until the water content reaches about 70% by weight is added to the feed, the total amount of water in the feed increases by 2.1%, and the feed tends to harden.

  On the other hand, in order to obtain the same effect as the case of using the distilled and concentrated waste liquid having a water content of about 70 wt% by using the distilled and concentrated waste liquid concentrated until the water content becomes about 50 wt%, the feed is 2.1 wt%. It only needs to be added, and the total water content of the feed increases only by 1.1% and has little effect on the properties of the feed. Therefore, if this distilled waste liquid can be concentrated to a water content of about 50 wt%, the water content of the feed can be suppressed to a water content within a range where mold does not occur and is hard to solidify.

  Then, about the method of improving the fluidity | liquidity of a concentrate and concentrating, for example, patent document 1 is disclosing the technique which adds fats and oils to a shochu waste liquid, and concentrates.

JP-A-4-16277

  However, since the technique described in Patent Document 1 is a technique used exclusively to remove moisture from the shochu waste liquid, various inconveniences occur. For example, in the evaporative concentration apparatus described in Patent Document 1, since heat-drying is performed when the shochu waste liquid is concentrated, heat denaturation of proteins contained in the shochu waste liquid occurs, and the nutritional value of the shochu waste liquid is impaired. End up. Moreover, when performing a heat drying, oxidation of shochu waste liquid and added fats and oils occur, and the nutritional value of the shochu waste liquid is further impaired.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to concentrate a distilled waste liquid to such an extent that it can be used as a mixed feed material and to maintain the nutritional value of the distilled waste liquid.

  The method for concentrating distillation waste liquid according to the present invention comprises a step of adding fats and oils to the distillation waste liquid from which the solid portion has been removed from the distillation pad, and a step of concentrating the distillation waste liquids to which the fats and oils have been added at a temperature of 80 ° C. or lower in a steam atmosphere. It is characterized by having. Distilled rice cake refers to distilled water such as shochu, whiskey and brandy, or rice cake produced by the production of bioethanol.

  According to the present invention, fats and oils are added to the distillation waste liquid and concentrated at a temperature of 80 ° C. or lower in a steam atmosphere. Thereby, the distilled waste liquid can be concentrated to such an extent that it can be used as a mixed feed material, and the nutritional value of the distilled waste liquid can be maintained. Therefore, if the concentrated concentrated concentrated waste liquid is added to the feed, the flavor deterioration can be suppressed and the drip loss can be reduced.

  As a result of earnest research, the present inventor can produce a distilled concentrated waste liquid that does not impair the nutritional value of the distilled waste liquid by adding fats and oils to the distilled waste liquid and concentrating it in a steam atmosphere at a temperature of 80 ° C. or lower. I found.

  Moreover, the added fats and oils are contained as they are in the distillation concentrated waste liquid obtained by the concentration method of the present invention. If no fats and oils are added, the viscosity of the distilled waste liquid will increase rapidly after being concentrated to a volume of 1/20, so it is the limit to concentrate the water to about 70 wt%. If it is attempted to concentrate further, the distillation waste liquid will solidify, and it will be very difficult to remove from the concentrator and unload during transportation, and it will be difficult to add to the feed. The added fats and oils have a function of reducing the viscosity, and if the distillation waste liquid containing fats and oils is concentrated, the viscosity can be suppressed to the extent that it does not solidify even if the moisture is concentrated to about 50 wt%, and the maximum moisture content. Can be concentrated to about 25 wt%.

  The fats and oils to be added may be either vegetable fats or animal fats. When the fats and oils added to the distillation waste liquid are less than 0.2 wt%, the effect of reducing the viscosity is insufficient, and 5.0 wt% If it exceeds%, it cannot be formulated as a feed ingredient. Therefore, the amount of oil to be added is preferably 0.2 to 5.0 wt% with respect to the distillation waste liquid.

  Moreover, in the concentration method of this invention, it concentrates at the temperature of 80 degrees C or less in water vapor | steam atmosphere. The reason for concentrating at a temperature of 80 ° C. or lower is that the protein contained in the distillation waste liquid undergoes thermal denaturation at 80 ° C. or higher, and therefore the temperature during concentration needs to be 80 ° C. or lower. In addition, the reason for concentration under anaerobic conditions in a steam atmosphere is that oxygen is contained, the components contained in the distillation waste liquid and the added oil and fat are oxidized, and the nutritional value of the distillation waste liquid is It will be damaged. Therefore, it is necessary to perform concentration in an atmosphere that contains as little oxygen as possible.

Next, an example of concentrating shochu will be described as an example of the method for concentrating distillation waste liquid of the present invention.
First, in order to extract the shochu waste liquid, the shochu was separated into a solid portion and a liquid portion by a solid-liquid separation method. At this time, when the water content of the separated liquid part (shochu waste liquid) was measured, the water content was 98 wt% and the dry matter content was 2 wt%.

  Next, feed fats and oils (chicken oil) were fed into the evaporator together with the extracted shochu waste liquid at a rate of 2.0 wt% with respect to the shochu waste liquid using a pump with adjustable speed. FIG. 1 is a diagram showing an outline of the external structure of the triple effect concentrator used in this example, and FIG. 2 is an enlarged view showing the detailed structure of the evaporator.

  As shown in FIG. 1, a feed liquid (a shochu waste liquid to which feed fats and oils are added) 1 is first sent to the first evaporator 6. The atmosphere in the first evaporator 6 is filled with the steam 3 heated by the steam gas sent via the second evaporator 7 and the third evaporator 8. The heated steam 3 is always supplied to the third evaporator 8 and is discharged from the first evaporator 6 via the second evaporator 7, cooled by the cooling water 4 and collected. In addition, the temperature in the 1st-3rd steam cans 6-8 is maintained at 70 to 80 degreeC.

  Then, as shown in FIG. 2, the supply liquid 1 concentrated through the first and second evaporators 6, 7 is finally supplied from the upper part of the third evaporator 8, Concentrate under atmosphere. Then, the concentrated shochu-concentrated waste liquid 2 is supplied from the lower part of the third evaporator 8 to a concentrated liquid tank (not shown), and the removed water is separately collected as condensed water 5.

  In this example, using such a triple effect concentrator, the shochu liquor was concentrated in three stages to produce a shochu-enriched waste liquor having a water content of about 40 wt%.

  Next, the components and viscosity of the shochu-concentrated waste liquid collected in the concentrate tank were measured. About the component of the shochu-concentrated waste liquid, the component ratio was measured. For comparison, the component ratio was also measured for the shochu-concentrated waste liquor obtained by concentrating the shochu-liquor not added with feed fat and oil until the water content became about 70 wt% by the same method. The results are shown in Table 1.

  As shown in Table 1, it was confirmed that the amount of crude protein, crude ash, and NFE (carbohydrate) remained sufficiently as compared with the comparative example.

  Moreover, the viscosity of the shochu-concentrated waste liquid was measured. For comparison, five shochu concentrates of shochu liquor to which no fat for feed was added until the water content was 96.4, 90.9, 87.2, 64.3, 54.5 wt% by the same method. The viscosity of the concentrated waste liquid was also measured. The results are shown in Table 2.

  As shown in Table 2, in the case where no fat is added, if the water is concentrated to 54.5 wt%, the fluidity is lost and solidified to such an extent that the viscosity of the shochu-concentrated waste liquid cannot be measured. However, it was confirmed that the shochu-concentrated waste liquid concentrated in this example maintained fluidity even when it was concentrated until the water content became 40 wt%.

  Next, the shochu-concentrated waste liquid produced in this example was added to the feed, and the feeding effect was examined. As shown in Table 3, the feed used in this example contains corn, alfalfa, and the like. In this example, 5 wt% of the shochu-concentrated waste liquid was added to the feed. For comparison, a feed having a component ratio as shown in Table 3 was prepared as a comparative example, and the amounts of TBARS (peroxide index value), muscle drip loss, and muscle glycogen were measured for the feeding effect of the shochu-concentrated waste liquid. It was measured.

  FIG. 3 is a diagram showing measured values of TBARS in the present example and the comparative example. TBARS is an index of peroxide and means oxidation to meat. In this example, the value of TBARS is decreased as compared with the comparative example, and it can be seen that the antioxidant property against the meat is increased.

  FIG. 4 is a diagram showing measured values of muscle drip loss in the present example and the comparative example. Muscle drip loss means the amount of leakage of gravy during storage, and in this example, muscle drip loss is reduced compared to the comparative example, and it can be seen that the amount of leakage of gravy decreases.

  FIG. 5 is a diagram showing measured values of muscle glycogen in the present example and the comparative example. As the amount of muscle glycogen increases, the meat taste increases. In this example, the muscle glycogen increases compared to the comparative example, and the meat taste improves.

  As described above, according to the present example, by adding fats and oils for feed and concentrating at a temperature of 80 ° C. or lower in a steam atmosphere using a triple effect concentrating device, the water content becomes about 40 wt%. Even if concentrated, fluidity can be left in the shochu-concentrated waste liquor, and furthermore, the nutritional value of proteins, sugars, lipids, vitamins, etc. can be kept intact. Thereby, if it adds to a feed, antioxidant property with respect to meat will be increased, the amount of leakage of meat juice will be decreased, and also the meat taste can be improved.

It is a figure which shows the outline of the external appearance structure of the triple effect concentration apparatus used in the Example of this invention. It is an enlarged view which shows the detailed structure of the evaporator of the triple effect concentration apparatus used in the Example of this invention. It is a figure which shows the measured value of TBARS in the Example and comparative example of this invention. It is a figure which shows the measured value of the muscle drip loss in the Example and comparative example of this invention. It is a figure which shows the measured value of the muscle glycogen in the Example and comparative example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supply liquid 2 Shochu concentrate waste liquid 3 Heating steam 4 Cooling water 5 Condensed water 6 1st evaporator 7 2nd evaporator 8 3rd evaporator

Claims (2)

Adding fats and oils to the distillation waste liquid from which the solid portion has been removed from the distillation pad;
And a step of concentrating the distillation waste liquid to which the fats and oils are added at a temperature of 80 ° C. or lower in a steam atmosphere.   2. The method for concentrating distillation waste liquid according to claim 1, wherein, in the step of adding the fat and oil, 0.2 to 5.0 wt% of the fat and oil is added to the distillation waste liquid.

Images