RU2534271C2 - Apple compote sterilisation method - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: method involves sequential heating of compote in a 120°C air flow at a rate of 8-9 m/s during 18 minutes, showering with 100°C water during 18 minutes with stage cooling in baths with 80°C water during 5 minutes, with 60°C water during 5 minutes and with 40°C water during 7 minutes. During processes of heating in air flow and cooling, the jar is subjected to interrupted 2-3-minutes' turning upside down with a frequency equal to 0.166 s^-1 with a 2-3 minutes' interval.

EFFECT: more complete preservation of biologically active components of the initial raw materials and boiled and cracked fruits quantity reduction.

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Description

The proposed method for the invention relates to the canning industry, and in particular to methods for sterilizing apple compote in cans SKO 1-82-1000.

Sources, which were searched by this method, showed that the prototype of the proposed method is a method of sterilizing compotes [1], the essence of which is that the rolled cans are placed in a sterilization apparatus (autoclave) and subjected to heat treatment according to the regime:

where: 25 - the duration of heating the water in the autoclave to 100 ° C, min; 35 - the duration of their own sterilization, min; 25 - cooling time, min; 118 - back pressure in the autoclave, kPa; 100 - sterilization temperature, ° C. The total duration of the regime is 60-65 minutes.

The disadvantages of this method are:

- long duration of the process and uneven heat treatment of different layers of the product in the bank (the temperature difference between the central and peripheral layers reaches 8-9 ° C) and, accordingly, different sizes of sterilizing effects, while the peripheral layers of the product receive excessive heat exposure, which significantly reduces the nutritional value finished products due to the splitting of biologically active components contained in the feedstock;

- violation of the integrity of the fruit due to excessive heat and digestion of individual fruits located in the peripheral areas of the banks;

- high consumption of heat and electric energy and water.

The technical result of the proposed method is aimed at creating a method for the production of compotes, providing: reducing the duration of the process; reduction in the number of boiled fruits and fruits with cracked peels; more complete preservation of biologically active components of the feedstock in the finished product, as well as saving heat energy, water and thereby reducing costs and increasing the competitiveness of the finished product.

The specified technical result is achieved due to the fact that according to the proposed method, the cans after seaming are installed in a special carrier that provides mechanical tightness of the cans, and subjected to heating in a stream of heated air at a temperature of 120 ° C and a speed of 2.5-3 m / s for 28 min with simultaneous intermittent 2-3-min rotation of the can from “bottom to cover” with a frequency of 0.166 s ^-1 with an interval of 2-3 min, with continued heating by hot showering at a temperature of 100 ° C for 12 min in a static state, followed by a stepwise about by bathing with water at a temperature of 80 ° C for 5 min, 60 ° C for 5 min and 40 ° C for 7 min, while the jar is also subjected to intermittent 2-3-minute rotation from the “bottom to cover” frequency 0.166 s ^-1 with an interval of 2-3 minutes.

An example implementation of the method.

Cans with compote after sealing the lid are installed in a carrier that provides mechanical tightness (to prevent the lid from tearing off during heating), and placed in a chamber where heated air circulates with a temperature of t _in = 120 ° C and a speed of 2.5-3 m / s, and for 28 minutes the contents of the cans are heated with a simultaneous intermittent 2-3 minutes rotation of the can from the “bottom to the lid” with a frequency of 0.166 s ^-1 with an interval of 2-3 minutes, then the carrier with the cans is transferred to the heating zone by hot water temperature of 100 ° C for 12 min, while Anka is in a static state, followed by stepwise cooling in baths with water at a temperature of 80 ° C for 5 min, 60 ° C for 5 min and 40 ° C for 7 min, and the jar is also subjected to intermittent 2-3 minutes rotation from "bottom to cover" with a frequency of 0.166 s ^-1 with an interval of 2-3 minutes.

Preheating the cans with compote in a stream of heated air prevents the thermal battle during subsequent sterilization by showering with water at a temperature of 100 ° C, and the use of hot water at a temperature of 100 ° C in the second stage of heating provides an intensification of the heat treatment process, since the heat transfer coefficient of water is several times higher than air.

The use of intermittent rotation of the cans in the processes of heating with hot air and cooling helps to intensify the process of internal heat transfer in the can and in combination with holding the cans in a static state during hot water stifling prevents the process of mechanical rubbing of fruits among themselves, which helps to preserve their integrity, and shortening the duration of the process contributes to more complete conservation of biologically active components contained in the feedstock.

In addition, intermittent rotation of the cans saves the energy spent on the rotation of the cans, while ensuring the uniformity of the heat treatment process and its intensification.

Salient features of the proposed method are: the compote is heated in a stream of heated air with a temperature of 120 ° C and a speed of 2.5-3 m / s for 28 minutes with a simultaneous intermittent 2-3-minute rotation of the can from “bottom to cover” with a frequency of 0.166 s ^-1 with an interval of 2-3 minutes with continued heating with water at a temperature of 100 ° C for 12 minutes in a static state of the cans, followed by stepwise cooling in baths with water at a temperature of 80 ° C for 5 min, 60 ° C for 5 min and 40 ° C for 7 min, and the bank also subjected to intermittent 2-3 minutes with rotation "bottoms on the lid" frequency of 0.166 s ^-1 at intervals of 2-3 minutes.

This mode ensures the industrial sterility of canned food, as evidenced by the magnitude of the sterilizing effect, which corresponds to the normative value of 150-200 conv. min [2].

In addition, the proposed method in comparison with the prototype provides significant savings in heat and electric energy, water, provides a more complete conservation of biologically active components of the feedstock, reducing the number of boiled fruits and fruits with cracked skin and increasing the competitiveness of the finished product.

Literature

1. A collection of technological instructions for the production of canned food. T.2 - M., Food industry, 1977.

2. B.L. Flowmenbaum. Basics of food preservation. M., Light and food industry, 1982.

Claims (1)

A method of sterilizing apple compote, including heating and cooling processes, characterized in that the compote is heated sequentially in an air stream at a temperature of 120 ° C and a speed of 2.5-3 m / s for 28 minutes and hot water is heated at a temperature of 100 ° C for 12 minutes, followed by stepwise cooling in baths with water at a temperature of 80 ° C for 5 min, 60 ° C for 5 min and 40 ° C for 7 min, and the jar is subjected to heating in an air stream and cooling intermittent 2-3-minute rotation from “bottom to cover” with a frequency of 0 , 166 s ^-1 with an interval of 2-3 minutes.