In many industrial processes, liquid/solid separation is achieved by a combination of mechanical and thermal (drying) processes, resulting in a low final water (or solvent) content in the product. Thermal drying in a mechanical separation device offers a lot of advantages (lower investment, higher productivity...). Moreover, coupling mechanical and thermal effects may lead in some cases to synergic effects allowing an optimal use of energy. Thermal input by dielectric heating may be adapted to a centrifuge. Previous work (Xabier Apaolaza (2014)1) was performed to develop a centrifugation pilot allowing the implantation of microwaves in a rotating machine. It has already been used for the spinning and drying of textile reel and it will be used for the extraction of natural products for future works. In the present study, the potential of this centrifugal microwave extraction (MW/C) has been compared with a microwave extraction without centrifugal effect for extraction of phenolic compounds from lettuce (Lactuca sativa).
The first results showed the positive effect of the combination of the two effects...
Session: L6 - Cake Filtration – Two- and Multi-Component Slurries
Day: 14 March 2018
Time: 10:45 - 12:00 h