부산대학교 도서관

The objective of this paper is dedicated to the experimental analysis of a square pulsed electric field (PEF) treatment chamber comprising two and three parallel units constituted by three and five alternate HV-Ground electrodes respectively. The chamber made of Plexiglas has a square paralelipedic shape of dimensions 6x6x10 cm³, in which are placed vertical and parallel stainless steel electrodes, of dimensions 10x6 cm². This chamber has been compared to the classic one-unit model constituted of two electrodes, one HV and one ground electrodes both placed on the side walls of the chamber. The experimental analysis was made using a spark-gap switch pulse generator, by measuring the mass of PEF pretreated extracted juice from red beet, the amount of betanine and the consumed energy. The obtained results have shown that the proposed models constituted of two and three units leads to better yields than the similar classic model constituted of only one treatment unit. Indeed, much higher increase rate values of extraction up to 40% with an energy saving up to 48% of both juice mass and betanine were obtained with the multi-units chambers with smaller energy consumption. [ABSTRACT FROM AUTHOR]