СОЧЕТАННЫЕ ТЕХНОЛОГИИ КОНСЕРВИРОВАНИЯ ПИЩЕВЫХ ПРОДУКТОВ С ИСПОЛЬЗОВАНИЕМ БИОЛОГИЧЕСКИХ БАРЬЕРОВ

Abstract

In this work, we investigate a combined effect of bioprotective cultures and inert gas packaging on the preservation of semi-finished vegetable products under the conditions of standard refrigerated storage. For the preparation of semi-finished vegetable products, fruits of red and yellow bell pep-per, zucchini and eggplant, as well as celery stalks and Iceberg lettuce heads were used. These products were packaged using a flat multilayer film PA/adhesive/PE and a combined film material PET/A1/PE (Lyon company, Russia), along with food gas mixtures Biogon ®NC20 and Biogon ®NC40 (Linde Gas, Russia). Microbial single-strain preparations produced by Chr. Hansen (Den-mark) were used as biobarrier cultures. Technological recommendations for treating semi-finished vegetable products by a suspension of bioprotective cultures, which are resistant to the inert gas media of Biogon ® NC40, are presented. The products were packaged in a gas-barrier film using a mixture of Biogon ® NC40. The as-packaged semi-finished products were stored in a refrigeration chamber at a temperature not exceeding 4 ± 2 °C. The effect of the modified gas media of Biogon ® NC40 and Biogon ® NC20 on the viability of Lactobacillus sakei, Pediococcus acidilactici surva-tus, Lactobacillus and Leuconostoc carnosum cultures was studied. A mixture of Biogon NC40 and Lactobacillus sakei is found to be optimal for preserving the quality of semi-finished pepper, egg-plant and zucchini. Iceberg lettuce is best preserved using Leuconostoc carnosum. The proposed method for the bio-preservation of semi-finished vegetable products has been introduced into production in the Russian company 'Velikoross' (St.-Petersburg).