Abstract
The process of intensifying dehydration of pectin-containing raw materials by using centrifugation with simultaneous application of low-frequency oscillations to the working container creates an electroosmotic effect in unilateral diffusion to improve the filtration process. It is established that to reduce the technological resistance in the presented methods; it is necessary to create a fluidized bed of products due to the oscillating motion of the working capacity. An experimental vibration unit has been developed to determine the rational parameters of the vibrocentric moisture removal process using the electroosmotic effect. It is proved that the complex of the designed equipment provides consecutive carrying out of three-stage vibration filtration-convective drying of high-moisture production by an alternation of action of a stream of the heat carrier, an electromagnetic field, low-frequency fluctuations. According to the research results, the dependences of the kinetics of the moisture diffusion process on the electric field strength are obtained; frequency of electric current and duty cycle of pulses, which allowed to optimize the process parameters according to the criteria of minimizing energy consumption. It was found that the processing time to achieve the desired humidity with the application of vibration, filtration, and electroosmotic effect was twice less than for filtration drying in a fixed bed. In combination with the noted physical and mechanical factors, the proposed technology improves the technical and economic parameters of the studied process.
Highlights
Pectin-containing raw material, in particular, beet pulp, which is a valuable raw material for processing, pharmaceutical, and food industries, was used as the object for processing
The process of intensifying dehydration of pectin-containing raw materials by using centrifugation with simultaneous application of low-frequency oscillations to the working container creates an electroosmotic effect in unilateral diffusion to improve the filtration process
Investigation of the dehumidification process was performed following the general method, which involved measuring the moisture content of pectin-containing raw materials depending on the processing time using a laboratory installation (Figure 1)
Summary
Pectin-containing raw material, in particular, beet pulp, which is a valuable raw material for processing, pharmaceutical, and food industries, was used as the object for processing. One of the most promising areas of beet pulp use is dietary fiber production. Modern technologies have been developed to obtain clarified dietary fiber from beet pulp, which contains a large amount of pectin and can be used as an additive in manufacturing a wide range of foods. Beet pulp dietary fiber has a lower moisture-holding capacity because it contains up to 10% of hydrated pectin. These properties allow using beet dietary fiber to produce dietary supplements for preventive nutrition [2]
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