RU2273647C1 - Process for production of pectin from wet coffee purification waste - Google Patents

Abstract

FIELD: food processing industry.

SUBSTANCE: invention discloses a pectin production process characterized by that starting material utilized is wet coffee purification waste, which is washed with water at 70-80°C for about 1 h and then subjected to hydrolysis and extraction at 60-90°C for 1-2 h using hydrolysis agent with pH 1.5-3, whereupon liquid phase is separated and target product is recovered therefrom.

EFFECT: enabled utilization of waste for production of product meeting requirements of corresponding state norm.

Description

The invention relates to a technology for the production of pectin.

Each technology for the production of pectin from any type of raw material provides for its preparation for hydrolysis-extraction, hydrolysis-extraction, separation of the liquid phase and isolation of the target product from it. Moreover, the preparation stage is always individual for each type of raw material, the hydrolysis-extraction stage has three implementation options, the choice of which depends on the chemical composition of the pectin substances of the raw material, and the stages of separation of the liquid phase and isolation of the target product from it are universal, and their choice does not affect the possibility implementation of the entire technology (Donchenko L.V., Technology of pectin and pectin products. Textbook for university students - M .: DeLi, 2000, p. 51-95).

According to the specified source of information, coffee is not considered as a raw material source for pectin production.

In the process of preparation, coffee beans are cleaned from fruit pulp and shells by the dry or wet method to obtain waste that does not have industrial use (Tatarkhenko II, Mokhnachev IG, Kasyanov GI, Technology of subtropical and food flavoring products. Study guide for University students - M .: Academy, 2004, p. 323-325).

The objective of the invention is the expansion of the raw material base of pectin production due to unused coffee processing waste.

The technical result of the invention is the production of pectin from waste wet coffee.

This result is achieved by the fact that the method for the production of pectin from waste coffee wet cleaning involves washing with water at a temperature of about 40 ° C for about 1 hour, hydrolysis-extraction, separation of the liquid phase and the allocation of the target product from it.

The possibility of implementing the indicated purpose in the described way was confirmed empirically.

The authors first conducted an analysis of the composition of pectin substances from wet coffee cleaning waste, which showed that they can be classified as Group II raw materials, hydrolysis-extraction of which is carried out at a temperature of 60-90 ° C for 1-2 hours using a hydrolyzing agent with pH 1.5-3.

Since waste wet coffee cleaning does not require preliminary grinding, an attempt was made to obtain pectin from them without special preparation by hydrolysis-extraction at the above parameters, phase separation and separation of the target product from the liquid phase by traditional methods. However, the obtained product contained, in addition to pectin substances, impurities in an amount of 44.8 to 52.7%, which does not correspond to the concept of "pectin" according to GOST R 51806, according to which the content of pectin substances should be at least 65% by weight of dry substances. From this, it was concluded that in order to obtain pectin from wet coffee cleaning wastes during their preparation for hydrolysis-extraction, it is necessary to conduct operations on the preliminary removal of non-pectin substances from raw materials.

To achieve this goal, a series of experiments was carried out on washing the raw materials with water with varying water temperatures and washing times. Subsequently, the raw materials were processed according to the technology described above. The experiments showed that at a water temperature of 40 ° C and a washing time of 1 hour, the target product contains 76.4% of pectin substances, that is, corresponds to the concept of "pectin" according to the above standard. At the same time, both a reduction and an increase in washing time by 15 minutes or more and an increase or decrease in water temperature by 2 or more degrees, that is, within the inertia of the system, led to an increase in the content of impurities in the resulting product above the limit specified by the standard.

Thus, the proposed method implements the specified purpose only if there is a specified operation for the preparation of waste wet coffee for hydrolysis-extraction, only with the specified parameters of this operation, when carrying out hydrolysis-extraction according to the technological parameters characteristic of the raw materials of group II, and the subsequent separation of the liquid phase and isolating the desired product from it by any conventional methods.

Claims (1)

Method for the production of pectin, characterized in that the raw materials use waste wet coffee, which is washed with water at a temperature of 70-80 ° C for about 1 hour, and then hydrolysis-extraction is carried out at a temperature of 60-90 ° C for 1- 2 hours using a hydrolyzing agent with a pH of 1.5-3, separating the liquid phase and isolating the desired product from it.