The main biochemical component of soy is protein, but it contains quite active anti-nutritional substances, such as proteolytic enzyme inhibitors, urease, lectins and others that reduce its nutritional value. This is the main deterrent to the use of soy in raw form for feeding farm animals and widespread use in the food industry. The article deals with the issues of inactivation of anti-nutrient substances using low-frequency ultrasound in water with hydrogen peroxide.

The theoretical study made it possible to define the main correlation dependences affecting the efficiency of grain preparation for milling. Experimental studies allowed improving the technology of grain softening and washing. Design and operating parameters of ultrasonic facility and technology ensuring high degree of grain cleaning and moistening were studied and structured, namely: ultrasound frequency – 18 kHz; process temperature – 30-40 °C; processing time – 30-40 s; intensity of ultrasonic waves – 1 W/cm2.

Many processes take place in the food and processing industry for a long period of time. The authors of the article, based on experimental studies, propose to intensify the processes of humidification, washing, disinfection and extraction using low-frequency ultrasound. Laboratory ultrasound installations with an ultrasound frequency of 18 – 35 kHz were used for research.

The article considers the method of processing soybeans in the production of feed for farm animals. The proposed technology can reduce the inhibitory activity of raw soy and reduce the activity of urease. Soybean treatment is carried out with an oxidizing solution containing hydrogen peroxide concentration of 9 % at a temperature of 18-20°C with simultaneous acoustic treatment from two ultrasonic emitters with an ultrasound frequency of 20 kHz, creating an intense cavitation for 10 minutes.

The results of a study of the effect of wet ultrasonic lamb meat salting on the muscle tissue microstructure are presented, and the technical parameters of the ultrasonic device are justified. It has been established that significant destruction and swelling of muscle fibers, local destruction of the sarcolemma with its pronounced rugosity are observed at ultrasonic salting with a frequency of 35 kHz, the cross-striation is poorly expressed, the tissue structure is disturbed. An ultrasonic salting with a frequency of 26 kHz was accompanied an increase in the number of transverse microcracks and crevices, loosening of muscle fibers, the formation of cavities between them while retention of the tissue structure, which contributes to the appearance of a brine between muscle fibers and accelerates its penetration into the fiber. It allows us to recommend ultrasound at a frequency of 26 kHz for cavitation activation of the brine to intensify the technological process of lamb meat salting.