RESEARCH OF THE CHANGE OF THE PRODUCT CONSISTENCE DURING HIS ULTRASOUND PROCESS

This article presents the results of studying the effect of ultrasound on the consistency of products. The task of the study was to identify the possibility of using ultrasound to change the consistency of the product from puree to homogenized. For this purpose, laboratory samples of apple puree were periodically processed on an ultrasonic generator at a frequency of 21.7 kHz, for different duration of exposure to ultrasound from 1 minute to 20 minutes. After processing, measurements of physicochemical parameters were carried out the mass fraction of soluble solids, temperature and viscosity. When analyzing the obtained results, it was found that, depending on the exposure time, the indicators of the mass fraction of dry substances in samples No.1, No.2, No.3 slightly increased relative to the control sample from a value of 11.9 to 12.4 V of sample No.4, in which the duration of exposure to ultrasound was 20 minutes, the indicator of the mass fraction of dry substances increased more significantly up to 13.8%. The same dynamics is observed in the obtained values of the viscosity of the product, which gradually increases in proportion to the exposure time from sample No.1 to sample No.4 (4600-6500 Centipoise (CP)). In addition, a comparative assessment of the organoleptic characteristics of experimental samples (taste, color, aroma and texture) was carried out after their ultrasonic treatment, depending on the duration of exposure. It was found that all the organoleptic characteristics of apple puree with an increase in the duration of ultrasonic treatment with a given parameter at a frequency of 21.7 kHz, changed depending on the time of exposure. Thus, the consistency changed from a “granular” structure (in the control sample) to a homogeneous homogenized (in sample No.3). In sample No.4 (with an exposure time of 20 minutes), mashed potatoes were obtained with a fine, finely divided creamy mass. Consequently, the effect of ultrasound with a given frequency of 21.7 kHz for at least 10 minutes allows a pureed product with a puree-like structure to obtain a homogenized puree.