The method of purification of milk from radionuclides

 

(57) Abstract:

Use: dairy industry, in particular, when cleaning the milk from radionuclides. The essence of the invention: after separation in milk contribute sorbent, which is used as a waste of cereals at a ratio of from 1:80 to 1:100, at the moment of contact with the sorbent resulting mixture is heated to 85-95oC for 30-70 min with stirring, cooled to 2 to 10oC and centrifugation, or by filtration of the resulting precipitate salts of strontium with a desiccant. table 1.

The invention relates to methods of cleaning polydisperse liquid media, in particular dairy, from radioactive impurities and can be used in the processes associated with obtaining products safely in sanitary gigienicheskom respect and protection of the environment.

There are various ways of cleaning fluids from radionuclides with natural and plumbing zeolite sorbents on the basis of ferrocyanides metals and ion-exchange resins.

Closest to the claimed is a method comprising cleaning the milk, separating it skimmed milk, cooled to 4-8oC has podci is using 0.1 volume of wet resin per minute (the ratio of the sorbent milk 1:25 1:30) for 5 h, neutralization of milk 1.5 M solutions NOH or CON, washing the resin from milk proteins, processing salt solution, disinfecting resin and wash it softened water. (U.S. Pat. USA N 3194663, CL A 23 C 7/04, B 01 J 39/04).

However, this method is difficult, long and expensive implementation, and in addition, is the pollution of the washing waters.

The aim of the invention is the simplification of the purification method, acceleration and cost reduction.

The technical result of the invention lies in the fact that the original product is in contact with the sorbent, which use waste vegetable (rice) production in the ratio of 1:80 1:100, followed by heating the mixture to a temperature 88-92oC with periodic mixing for 60-90 min, with the formation of insoluble salts of strontium, and then cooled to 4-8oC and filtering the resulting precipitate salts of strontium. The proposed method does not require special equipment, acidification of milk, neutralization of milk does not alter the composition and properties of the processed product. Can be performed in an industrial environment, in conditions of farms and individual farms.

the comfort, get skim milk, and then make a sorbent, which is used as vegetable wastes (e.g., rice) at a ratio of sorbent milk from 1: 80 to 1:100, is heated to a temperature of 80-95oC for 30-70 min with periodic mixing, resulting in the formation of insoluble salts of strontium. Then the mixture is cooled to 2 to 10oC and separated from the salts of strontium by centrifugation or filtration. The cleaning efficiency of skim milk from strontium is 60-65 (see table).

Example 1. In 100 ml of skim milk to make 1 g of waste rice production, heat the mixture to 85oC with periodic stirring for 30 min, cooled to 10oC and precipitated insoluble salts of strontium with the waste is separated by filtration, and then determine the specific radioactivity of the sample. The cleaning efficiency of milk is 60

Example 2. In 80 ml of skim milk to make 1 g of waste wheat production, heat the mixture to 95oC with periodic stirring for 70 min, cooled to 2oC, precipitated insoluble layers of strontium together with waste wheat production is isdi is 65

The method of purification of milk from radionuclides of strontium, including separation, separation of obtaining skim milk and contact with the sorbent, wherein in use as a sorbent waste of cereals at a ratio of 1:80 and 100, respectively, in the moment of contact with the sorbent resulting mixture is heated to 85 95oWith over 30 70 min with stirring and the formation of insoluble salts of strontium and then cooled to 2 10oWith and by centrifugation or filtration of the resulting precipitate salts of strontium with a desiccant.

 

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