Engineering, Energy, Transport AIC

Bandura Valentyna – Professor, Candidate of Technical Sciences, Head of the Department of Agricultural Engineering and Technical Service, Vinnitsa National Agrarian University (3, Sonychna St., Vinnytsia, 21008, Ukraine, e-mail: bandura_3@ukr.net)

The key process for extracting oils from raw materials is extraction. In this case, extraction is a complex and time-consuming process. The extraction process is characterized by low intensity. One of the most promising and innovative methods of extracting plant material is the use of microwave technologies. As there are no generally accepted recommendations for microwave extraction regimens and extract properties, this makes it impossible to create the appropriate technology and to develop a microwave extractor to obtain the target substances.

The article reviews the existing equipment for extraction of various raw materials. It is shown that pulsed electromagnetic field is an effective tool for the implementation of microwave technology. The degree of intensification of mass transfer processes with the application of directional energy diffusion technologies can be much higher than the possibilities of traditional technologies. Scientists study that traditional processes take 3 hours or more, and the process of barodiffusion plus gravity takes less than 30 minutes.

The results of the study of the innovative process of soybean extraction using microwave technologies are presented in the article. With increasing temperature, the extraction rate increased, which was associated with an increase in the rates of chemical reactions and diffusion coefficients, a positive effect on the kinetic, internally and externally diffusive nucleus, the driving force of the process increased, and the resistance to its course decreased. The intensification of the extraction process by the microwave field occurs by increasing the pressure inside the capillaries of the vegetable raw materials, with their subsequent destruction and maximum flow of the target component into the extractant. There is a flow of diffusion, which contributes to a significant reduction in time and increase the extraction of valuable components from raw materials.

The use of microwave technologies is real and promising as the extraction process facilitates the release of the target component with a significant increase in the concentration (an average of 2 times) and a significant reduction in the oil extraction time.

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