Intensification of Penicillin Drying in Industrial Vacuum Drum Dryer Based on Short Contact Theory

Calculation of Vacuum Drying of Dispersed Materials From Multicomponent Liquid Systems

“…Frequently these parameters are kept close to constant during the drying process. It war proved by a number o f researchers [4,14,15,17] that the motive force of vacuum-conductive drying is not the concentrations difference (as it is in convective drying) but the temperature difference between the heating surface and the material, i.e thermodiffusion mechanism o f moisture transfer was established. Thus the drying rate is basically determined by the quantity o f heat supplied to the material and is proponional to temperature difference.…”

OPTIMIZATION OF THE VACUUM DEHYDRATION OF CELERY (APIUM GRAVEOLENS) USING THE RESPONSE SURFACE METHODOLOGY

“…Moreover, oxidation reactions are minimized because of the absence of air and the color, texture and flavor of the dried products are somewhat maintained (Gunasekaran, 1999). Vacuum drying was applied to the drying of oakwood (Fohr et al, 1995), penicillin (Sadykov, 1998), forage (Weeks and Whitney, 1964) and recently, microwave vacuum (MIVAC) to yoghurt (Kim and Bhowmik, 1995), fruits (Pappas et al, 1999) and food materials (Gunasekaran, 1999). The objective of the study was to optimize the drying conditions (drying temperature, vacuum pressure and slice thickness) of celery during vacuum dehydration resulting in a product of sufficiently low moisture content, high quality and consumer acceptability.…”