SU1730157A1 - Method for purification of diffusive juice - Google Patents

Abstract

The invention relates to sugar beet production, in particular to the process of cleaning a diffusion juice. The purpose of the invention is to reduce peptization sediment on defecation and reduce the color of the juice. The method of cleaning the diffusion juice consists in its predefinition, hot defecation, which involves the introduction of lime into the predetermined juice, stirring the mixture and passing through it dispersed ozonated air, saturation and filtration of the juice. After the lime is added to the predispersed lime juice, it is saturated with carbon dioxide at a gas-juice ratio of 1.0: 3.5-6.0, followed by exposure to air for 3.0–4.0 minutes.

Description

The invention relates to sugar beet production, in particular to the process of purification of diffusion juice.

A known method for purifying juice involves treating the juice for hot air flow. The reaction with oxygen in the air flows in the boundary layer of the juice-air. The air is dispersed into the juice to accelerate the reaction. The method is based on the fact that the decomposition of invert sugar in a strongly alkaline medium in the presence of atmospheric oxygen occurs with the formation of fewer carbonyl groups.

The disadvantage of this method is that the amount of carbonyl groups formed in the presence of amino acids and peptides is capable of producing highly colored compounds.

Closest to the present invention is a method for purifying diffusion juice, which includes preliming. hot defecation, which involves the introduction of lime into the pre-precoated juice, stirring the mixture and passing through it dispersed ozonated air, saturation and filtration.

When the juice is treated with ozonized air, the oxidation reactions of monosaccharides are accelerated with the formation of a large amount of colorless substances. The oxidation reactions are the stronger, the higher the ozone concentration.

The disadvantage of this method is that the oxidation processes are not limited to the formation of colorless substances. At the same time, the organic part of coagu XI CA O is oxidized.

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The one formed on the preliming, and the stronger, the higher the concentration of ozone in the air. This leads to increased pepticization of the sediment on defecation and an increase in the color of the juice.

The purpose of the invention is to reduce the pelticization of the sediment on defecation and reduce the color of the juice.

In order to achieve this goal, in the method of purifying diffusion juice, including preliming, hot defecation, introducing lime into the pre-baked juice, stirring the mixture and passing dispersed ozonated air through it, saturating and filtering the juice, the gas-juice volume ratio of 1.0: 3.5-6.0, followed by exposure before passing air for 3.0-4.0 minutes.

The method of cleaning the diffusion juice is as follows.

Lime milk is added to the heated diffusion juice with stirring until pH 11.0-11.2. Then, hot defecation is carried out, for which 1.8-2.2% CaO is added to the pre-juice of juice to the juice mass, after which the defecated juice is saturation with carbon dioxide at a gas-juice ratio of 3.5: 6.0 and kept for 3 -4 minutes In the process of hot bowel movement, dispersed ozonated air is passed through the juice for 10 minutes at a volume ratio of juice to air of 1: 0.5–3.0 with an ozone concentration of 3–10 g / nm3. Then, 1 saturation is performed to the optimum pH value and filtration, II saturation and filtration,

It is known that as the temperature of the defecated juice increases, the solubility of calcium hydroxide in it decreases. It is understood that the formation of saccharic acids during the decomposition of invert sugar just proceeds under conditions of increased solubility of lime, while lactic acid, which is also a decomposition product of invert sugar, on the contrary, is formed in larger quantities with a reduced solubility of lime. Lactic acid is the main source of the formation of coloring matter. Obviously it is more advantageous to have as much as possible solubility of lime on hot bowel movements, and with it to get more saccharic acids.

In the proposed method, it is possible to contain the decrease in solubility of calcium hydroxide under high temperature conditions, which is achieved by forming the juice of soluble carbonaceous sugars in the juice of the juice by introducing carbon dioxide in it in a volume ratio of gas-juice 1: 3.5-6.0.

Fever on stool

helps to reduce the concentration of calcium hydroxide and sugar calcium, which is undesirable, but in the formation of soluble carbonaceous sugars by

the introduction of a limited amount of carbon dioxide into the defecated juice is replenished by the reduced solubility of calcium hydroxide from its high temperature and its sugars. Besides,

an increase in sediment occurs, which is less subject to oxidation, which is manifested in a decrease in the coagulum peptization during defecation. The coarse sediment has a smaller contact surface with

oxidizing agent.

Thus, in the proposed method, the concentration of Ca (OH) 2 and its sugars in the solution is prevented from dropping the juice with lime and the reaction is directed towards the formation of the desired saccharinic acids.

As a result, the peptization of the sediment on defecation and the color of the juice are reduced.

The method was carried out on a diffusion juice of the same quality (DB 86.6%) under comparable conditions.

EXAMPLE 1. 8, heated to 85 ° C, a diffusion juice, taken in an amount of 1.5 liters, is pre-defecated by adding lime in an amount of 0.2% by weight of juice to increase the alkalinity to a pH of 11.1. . The duration of predefinition is 4 minutes. Then a bowel movement is performed. 2.0% lime is added to the juice.

to the mass of juice, after which it is carbonated at a gas-juice volume ratio of 1: 4.75 and incubated for 3.5 minutes. The process of hot defecation is carried out for 10 minutes while passing dispersed

ozonized air (ozone concentration of 6.5 r / HMj with a juice-air volume ratio of 1: 1.75. Then the juice is saturate to a pH of 11.3 and filtered. The filtrate is saturized to alkalinity of the juice And the saturation and filtered.

The following indicators were obtained: peptizirovano on defecation 1.6% of the mass of coagulant, the color of juice II saturation is 8.4 units. PC.

PRI mme R 2. The method is carried out analogously to Example 1. However, the juice is saturated with carbon dioxide at a gas-juice volume ratio of 1: 3.5 and held thereafter for 3 minutes.

The juice has the following indicators: peptizirovano on defecation 1.8% of the mass of the coagulum, the chromaticity of the juice It saturation is 8.8 units of Pcs.

Example 3: The method is carried out analogously to example 1, however, the juice is carbonated with carbon dioxide in bulk. 6 and incubated after this 4 min.

The juice has the following characteristics: neivisation 1.6% of the mass of the coagulum on the bowel movement, the chromaticity of the juice II saturation is 8.7 units. PC.

Example 4. The method is carried out analogously to example 1. However, the juice is saturated with carbon dioxide at a gas-juice ratio of 1: 3 and held for 2 minutes.

The juice has the following indicators: peptizirovano on defecation 3.0% of the mass of coagulant / color of juice II saturation is 10.4%.

PRI me R 5. The method is carried out analogously to Example 1. However, the juice is saturated with carbon dioxide at a gas-juice ratio of 1: 7 and incubated after 5 min.

The juice has the following indicators: peptizirovano on defecation 2.8% of the mass of coagulum, the chromaticity of juice II saturation is 10.0 units W.

By a known method, the following indicators were obtained: peptized on de0

five

0

five

0

feces 4.1% of the mass of the coagulum, the chromaticity of the juice II saturation amounted to 11.6%.

The best indicators of the quality of sludge and juice are achieved in examples 1, 2 and 3, when carbon dioxide is saturated with carbon dioxide at a volume ratio of gas to juice of 1: 3.5–6, followed by holding for minutes.

Outside of the indicated ratios, the amount of peptizing colloidal substances from the stool increases and the color of the juice increases. And saturation increases, which is confirmed by examples 4 and 5. -;

The proposed method makes it possible to reduce the coagulization of the coagulum on the bowel movement by 2-3% and the color of the juice of the II saturation by 3-4 U.S.

FORUMAWLAH AND ISLANDS

The method of purification of diffusion juice, including predefinition. hot defecation, which involves introducing lime into the pre-refined juice, mixing the mixture and passing through it dispersed ozonized air, saturation and filtration of the juice, characterized in that, in order to reduce peptization of the sediment to defecation and reduce the chromaticity of the juice, lime is added Saturated with carbon dioxide at a gas-juice ratio of 1.0: 3.5-6.0, followed by exposure before passing air for 3.0-4.0 minutes.

Claims (1)

Claim A method for purifying diffusion juice, including predefection. hot defecation, which involves introducing lime into the pre-defecated juice, mixing the mixture and passing dispersed ozonized air through it, saturation and filtering the juice, characterized in that that, in order to reduce the peptization of the sediment during defecation and reduce the color of the juice, after the lime is introduced into the pre-defecated juice, it is carbonated with carbon dioxide at a volume ratio of gas-juice of 1.0: 3.5-6.0, followed by exposure to air passage for 3 , 0-4.0 minutes