RU2459428C1 - Method for sterilisation of peach compote with kernels - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention relates to preservation industry, in particular, to a method for sterilisation of peach compote with kernels in jars SKO 1-82-3000. The jars filled with compote are heated in a 150°C air flow at a rate of 1.5-2 m/s during 26 minutes and in 100°C hot water during 25 minutes. Then one performs cooling in an atmospheric air flow at a rate of 7-8 m/s during 30 minutes. During the heat treatment process in the heated and the atmospheric air flows the jars are turned upside down with a frequency equal to 0.33 s^-1.

EFFECT: method allows to preserve natural components of the initial raw material, reduce boiled fruits quantity, enhance nutritive value of the ready product, intensify the thermal interchange process, prevent thermal breakage of containers, simplify the technological process.

Description

The present invention relates to the canning industry, and in particular to methods of sterilizing peach compote with pits in cans SKO 1-82-3000.

Sources that were searched by this method showed that the prototype of the proposed method is a method for 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: 30 - the duration of heating the water in the autoclave to 100 ° C, min; 45 - the duration of their own sterilization, min; 30 - cooling time, min; 118 - back pressure in the autoclave, kPa; 100 - sterilization temperature, ° C.

The disadvantages of this method are:

- the long duration of the heat treatment process, which affects the quality of the finished product;

- uneven heat treatment of different layers of the product in the bank (the temperature difference between the central and peripheral layers reaches 15-17 ° C and, accordingly, the magnitude of the sterilizing effects are not the same; the peripheral layers get excessive heat);

- high consumption of thermal energy and water.

The aim of the proposed method is to reduce the duration of the heat treatment process, save heat energy and water, and improve the quality of the finished product.

This goal 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 150 ° C and a speed of 1.5-2 m / s for 26 min subsequent transfer to a bath with water at a temperature of 100 ° C for 25 minutes and cooling in a stream of atmospheric air at a speed of 7-8 m / s for 30 minutes, and during the heat treatment in a stream of heated and atmospheric air, the cans rotate from the “bottom to the lid” with cha totoy 0.33 s ^-1.

An example of the method

Banks with compote after sealing cover mounted in a carrier providing the mechanical tightness (to prevent cap failure during heating) and placed in a chamber where the heated air circulates _{in the} temperature t = 150 ° C and a speed of 1.5-2 m / s, and for 26 minutes the contents of the cans are heated to 80 ° C, then the carrier with the cans is transferred for 25 minutes in a hot water bath at a temperature of 100 ° C, followed by cooling in a stream of atmospheric air at a speed of 7-8 m / s for 30 minutes and while in the process of heat treatment in sweat e heated and air cans are rotated to the "bottoms on the lid" frequency of 0.33 s ^-1.

Preheating the cans with compote in a stream of heated air prevents thermal battle during sterilization in a bath 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.

And the rotation of the cans during heating in a stream of heated air and when cooled by atmospheric air significantly reduces the unevenness of the heat treatment of canned food, and ensures uniform heating.

The salient features of the proposed method are: the compote is heated in a stream of heated air at a temperature of 150 ° C and a speed of 1.5-2 m / s for 26 min with continued heating in a bath with water at a temperature of 100 ° C for 25 min followed by cooling in a stream of atmospheric air at a speed of 7-8 m / s for 30 minutes, while the banks during heat treatment in a stream of heated and atmospheric air rotate from the “bottom to cover” with a frequency of 0.33 s ^-1 .

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

In addition, the proposed method in comparison with the prototype provides significant savings in thermal energy, completely eliminates the use of water in the cooling process and provides improved quality of the finished product by reducing the duration and ensuring the uniformity of heat treatment.

Literature

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

2. B.L. Flaumenbaum Fundamentals of food preservation. M .: Light and food industry, 1982.

Claims (1)

A method of sterilizing compote from peaches with pits, including heating and cooling processes, characterized in that the compote is heated sequentially in a stream of heated air at a temperature of 150 ° C and a speed of 1.5-2 m / s for 26 minutes and in hot water at a temperature of 100 ° C for 25 minutes, followed by cooling in a stream of atmospheric air at a speed of 7-8 m / s for 30 minutes, while during the heat treatment in a stream of heated and atmospheric air, the cans rotate from the bottom to the lid with a frequency of 0.33 s ^{- 1} .