Low temperature drying of pomace in spout and spout-fluid beds

Effect of coating on post-drying of freeze-dried strawberry pieces

“…It has been found that the high temperature applications such as 250°C of drying medium causes pomace hydrolysis and reduces the quality of oil produced (Gogus and Maskan, 2006). Contrast to this high temperature, lower temperature was needed in spouted bed drying and the lowest energy consumption was obtained for an air temperature close to 80°C (Marmo, 2007).…”

Drying and Shrinkage Kinetics of Solid Waste of Olive Oil Processing

“…Furthermore, the moisture content of two-phase olive mill waste must be reduced to about 5-8% (wet basis) to extract residual oil or use the material as fuel. [1] Numerous research works have studied drying of both solid and liquid olive mill wastes using a cabinet-type dryer, [3,4] a rotary dryer, [5,6] a tray dryer, [7,8] a spout-fluid bed dryer, [9] a fluidized bed dryer, [10][11][12] a solar dryer, [13,14] a microwave-convection pilot-scale dryer, [2] a microwave and a combined microwave-convection oven, [15] a drying tunnel, [16] and a thin-layer infrared dryer. [17] In a previous work, [18] a combined depollution-exploitation approach was developed based on screening and spray drying of OMW.…”

Hydrodynamic characteristics of a pulsed spouted bed of food particulates

“…Due to many shortcomings and limitations of a conventional spouted bed (CSB), however, a number of research works have been devoted to the study of modified spouted beds, both in terms of their hydrodynamic and heat/mass transfer (especially drying) behavior. These include studies of two-dimensional spouted beds (Kalwar et al, 1992;Passos et al, 1993;Prachayawarakorn et al, 2006), which can be scaled up easier than a conventional spouted bed; multiple spouted beds (Wang and Wei, 1999;Ren et al, 2010), which give higher circulation velocity of solids comparing with a conventional spouted bed at the same unit size; annular spouted beds (Hao et al, 2008;Guoxin et al, 2008), which present higher gas-solid heat transfer rate than a conventional spouted bed; draft-tube spouted beds (Freitas and Freire, 2001;Marmo, 2007), which provide more uniform particle residence time and exhibit lower pressure drops than a conventional spouted bed; jet spouted beds (Tia et al, 1995;Shuhama et al, 2003;Devahastin et al, 2006), which have been developed for very large, irregularly shaped and difficult-to-spout particulates and for drying of liquid slurries via the use of inert particles; rotating jet spouted bed (RJSB) and rotating jet annular spouted bed (RJASB) (Jumah et al, 1996;Devahastin et al, 1999), which can minimize the energy consumption during drying of large particles in the falling rate period.…”