JP2968121B2 - Alcohol solution cleaning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning an alcohol solution containing organic substances derived from food.

[0002]

2. Description of the Related Art When alcohol is used in the food field,
It is used for the purpose of preserving foods by a method of directly adding to foods, a method of spraying the foods on the surface or a method of immersing the foods in an alcohol solution of a certain concentration to sterilize the surface. Utilizing the bactericidal action of alcohol, it is also used as a sanitary control in the process of spraying food manufacturing machines, utensils, fingers and the like. In particular, recently, processed foods have been subjected to freezing processing to improve storage stability or processing suitability, for example, efficiency such as cutting, etc., and their use as freezing refrigerants has been increasing. In this case, an aqueous solution having an alcohol concentration of 20% or more is used. The higher the alcohol concentration, the lower the freezing point. Therefore, the concentration is generally about 60% to 80%. However, when alcohol is used for refrigerant, food is directly immersed,
For example, in meat hams, noodles, and the like, organic components such as proteins and carbohydrates in foods leak out, and the solution is remarkably suspended in the leaked components during repeated use.
Therefore, the used alcohol solution is reused after passing through a filter to remove leaked components.

[0003]

However, since the leaked components are extremely fine, the filtration efficiency is poor, and as the performance of the filter decreases, a clean alcohol solution cannot be obtained.
In addition, the current situation is that the filter must be replaced several times a day.

[0004]

Means for Solving the Problems The present inventors have cleaned the alcohol solution used for the immersion treatment, and have made it possible to sufficiently reuse the alcohol solution.
As a result of examining a method to reduce the complexity of the operation operation associated with filter replacement, it was found that a cationic polymer flocculant was added to the alcohol solution used for immersion, and then a water-soluble anionic polymer flocculant was added. Thus, by forming flocs of food components leaked into the alcohol solution, particularly proteins, which are insoluble components, and carbohydrates, the filterability is remarkably improved, the performance of the filter is suppressed, and a very transparent alcohol solution is obtained. thing,
Further, it has been found that the filter needs to be replaced only once or twice a day, and the workability is improved.

The present invention has been completed based on the above findings. That is, the present invention adds a cationic polymer coagulant to an alcohol solution containing organic matter particles derived from food, and then adds a water-soluble anionic polymer coagulant, thereby coagulating the organic matter, followed by filtration. And a method for cleaning an alcohol solution.

In the present invention, the alcohol solution containing a food-derived organic substance is an alcohol aqueous solution obtained by immersing a food in an alcohol solution, and the alcohol concentration is not particularly limited, and is preferably, for example, 20% or more. The alcohol solution after the immersion treatment contains a large amount of food-derived organic substances such as proteins and carbohydrates. Examples of foods to be immersed include meat and marine products and processed products thereof (eg, hams), processed cereals (eg, noodles), processed egg products, and the like.

As the cationic polymer flocculant used in the present invention, synthetic polymers such as aminoalkyl (meth) acrylate, acrylamide, aminoalkyl (meth) acrylamide and the like can be used. Is preferably a natural polymer such as chitosan.
The chitosan referred to here is obtained by, for example, treating chitin, which forms shells of crustaceans such as crab, shrimp and the like, with hydrochloric acid, dilute alkali treatment, high-temperature treatment with a high concentration (several 10%) of alkali, and deacetylation. Are preferred. In this case, the chitosan used in the present invention suitably has a deacetylation ratio of 60 to 80 mol%. In general, the chitosan thus obtained is extremely difficult to dissolve in water, and it is desirable to add the chitosan dissolved in an acid. Formic acid, acetic acid, malic acid, lactic acid, tartaric acid, citric acid, adipic acid,
Hydrochloric acid or the like is used. The addition ratio of the cationic polymer flocculant is 10 to 150 w / w%, preferably about 20 to 100 w / w%, based on the content of SS (Suspended Solid: suspended particles) in the alcohol solution. On the other hand, it is about 5 to 700 ppm, preferably about 50 to 500 ppm.

As the water-soluble anionic polymer coagulant, polyacrylic acid or a salt thereof, a partial hydrolyzate of polyacrylamide, a copolymer of acrylic acid and acrylamide, and the like are used. The sodium polyacrylate used is suitable. When sodium polyacrylate is used, a food additive grade is preferred, and its molecular weight is 2
It is preferable to use the one of about 100,000 to 6,000,000. The amount of the water-soluble anionic polymer flocculant added is SS in the alcohol solution.
0.5 to 50% based on the content, preferably 1.0 to 10 w
about 0.5% to 500% with respect to the alcohol solution.
ppm, preferably about 1 to 100 ppm.

The proportion of the cationic polymer flocculant to the water-soluble anionic polymer flocculant is 0.1 to 50 parts by weight, preferably 0.5 to 20 parts by weight, per 100 parts by weight of the former.
It is about parts by weight.

In order to carry out the method of the present invention, for example, an alcohol solution containing organic particles derived from food, preferably
A cationic polymer flocculant and a water-soluble anionic polymer flocculant are added and mixed with an alcohol solution having an SS content of 50 to 5000 ppm and a pH of 2 to 8 while circulating the alcohol solution as needed, and flocs are sufficiently obtained. You just have to remove the flock when you get it. Here, the order of addition of the cationic polymer flocculant and the water-soluble anionic polymer flocculant is not particularly limited, but after the cationic polymer flocculant is added first, the water-soluble anionic polymer flocculant is added. The addition gives a preferable result. In this case, after adding the cationic polymer flocculant, the mixture is sufficiently stirred (at a rotation speed of 10).
~ 500 rpm. Preferably 50 to 300 rpm. ) 1
Next, agglutinate. After the addition of the water-soluble anionic polymer coagulant, the mixture is stirred (rotation speed: 10 to 500 rpm, preferably 50 to 300 rpm) to strengthen the primary coagulation, and then the stirring is stopped and the mixture is allowed to stand to form a large floc. It is better to let it grow.

Hereinafter, an embodiment will be described in detail. Example 1 An alcohol solution (alcohol concentration 55%, SS 512 ppm, pH 5.5) after immersion treatment of ham was 1000
A predetermined amount of chitosan and sodium polyacrylate were sequentially added and stirred, and the mixture was stirred to remove the floc for the cleanliness of the alcohol and the removal of suspended substances. The absorbance (660 nm) of the supernatant was measured. It was as follows. Absorbance (660nm) Raw alcohol solution 0.312 Chitosan 50ppm + Sodium polyacrylate 5ppm 0.089 Chitosan 100ppm + Sodium polyacrylate 5ppm 0.051 Chitosan 200ppm + Sodium polyacrylate 5ppm 0.031 Chitosan 400ppm + Sodium polyacrylate 5ppm 0.0015 The amount added is the concentration based on the amount of alcohol solution. . The same amount of chitosan used was dissolved in a 0.2% hydrochloric acid solution. Also, sodium polyacrylate was dissolved in water to 0.1%. The removal rate of SS content is 400 ppm of chitosan,
It was 99% or more when 5 ppm of sodium polyacrylate was used. The alcohol concentration was almost the same as the concentration at the time of use. The pH was the same.

Example 2 1000 ml of an alcohol solution (alcohol concentration 30%, SS 750 ppm, pH 5.8) obtained by immersing boiled noodles
The result of measurement according to Example 1 was as follows. Absorbance (660nm) Raw alcohol solution 0.510 Chitosan 150ppm + Sodium polyacrylate 5ppm 0.020 Chitosan 150ppm + Sodium polyacrylate 15ppm 0.008 Chitosan 150ppm + Sodium polyacrylate 30ppm 0.015 SS content removal rate can be obtained by using chitosan 150ppm and sodium polyacrylate 5ppm or more. 95% or more.

[0013]

As is clear from the above, the method of the present invention makes it possible to efficiently remove the organic particles from the alcohol solution containing the organic particles derived from food, and to obtain an extremely clean alcohol solution.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) C02F 1/52-1/56 B01D 21/01 B01D 37/03

Claims (4)

(57) [Claims] A cationic polymer flocculant is added to an alcohol solution containing organic particles derived from food , and then a water-soluble anionic polymer flocculant is added to aggregate the organic particles. And then filtering the solution. 2. The method according to claim 1, wherein the anionic polymer flocculant is a polyacrylate. 3. The method according to claim 1, wherein the cationic polymer flocculant is chitosan. 4. An alcohol solution having an alcohol concentration of 20%.
The method according to claim 1, wherein the method is as described above.