Engineering Research Seminar 13, 2011: A Novel Approach on Atmospheric Freeze Drying

Dr Shek Md Atiqure Rahman, lecturer from School of Engineering, Monash University Sunway Campus

Date: 2011-05-05
Time: 15:00 to 16:00
Venue: LT 6-0-09


With increasing trend towards newer and better quality dried products, the development of appropriate drying technologies has become increasingly important. Vacuum freeze drying is the most widely used freeze drying process for highly heat sensitive valuable foods, pharmaceuticals, biological products, etc. This technique however, is expensive due to high fixed and operating costs as the moisture is removed via sublimation in vacuum. Therefore, efforts have been under way by a number of investigators to develop an atmospheric freeze drying system as a promising alternative cost-effective method. Conventional atmospheric freeze dryers utilize a bulky system of mechanical heat pumps to lower temperature and condensers to reduce humidity of the air. This presentation provides a novel technique of atmospheric freeze drying (AFD) in a vibro-fluidized bed dryer coupled with an adsorbent and multimode heat input. A detailed comparison with AFD using fixed bed, fluidized bed dryer, traditional vacuum freeze drying and heat pump drying is also presented. Therefore, this presentation will be useful for academics and industry personnel working in the area of low temperature dehydration processes. It should also be helpful to professionals in industry to implement new ideas for processing of high quality products or anyone who are associated with preservation methods for heat sensitive products.

About the Speaker

Dr Shek Md Atiqure Rahman obtained his Ph.D. and M. Eng degree in 2009 and 2003 respectively, in Mechanical Engineering from the National University of Singapore (NUS). During his Ph.D. research project, he carried out extensive experimental and numerical studies on the hydrodynamics and heat and mass transfer processes involved in the Atmospheric freeze drying systems. He has been actively engaged in research activities ever since he commenced his academic career. He has published books, book chapters and a number of refereed journal and peer reviewed conference papers which show his eligibility, motivation and devotion to pursue research. He has seven years experience on academic profession in Chittagong University of Engineering and Technology (CUET) Bangladesh, National University of Singapore (NUS) and currently in Monash University Sunway Campus.