Separation of free bran using electrostatic field system with electrically assisted flat PVC surface

The objective of this study was to investigate the possibility of separating free bran from bulgur using the triboelectric property of a flat PVC surface. The findings demonstrate that bran, which has an adverse impact on the physical appearance and quality of bulgur, can be effectively separated. It was established that the study offers a solution to the issue of bran. The use of a flat PVC surface, which can be defined as a flat inclined channel, represents a new technological development for bulgur production technology. The dimensions of the device were designed to be 4, 5 and 6 cm in width, 20, 40 and 60 cm in length, and with angles of 30, 35 and 40 degrees, respectively. A series of plates was fixed at the final point of the PVC surface in order to establish an electric field. To generate the electric field, one of the plates was subjected to a positive charge, while the other was treated with a negative charge. A variety of distances were observed between the plates, contingent upon the width of the tunnel. The flat PVC system proved to be an effective means of achieving the desired outcome. Consequently, a fine bulgur-bran mixture with an initial bran content of 5 g per 1000 g of bulgur was conducted through the system at a flow rate of 0.89 g/s. This resulted in a significant reduction in bran content from 5 g to approximately 2 g (60% reduction).