In this study changes in the drying kinetics color change and the energy consumption for microwave energy were investigated for Trabzon persimmon In addition to that the microstructure of the persimmon was also investigated by considering its thermal changes It is important to be aware of the purpose of the drying process for determining the drying system Fresh duck egg white (FDEW) powders and desalted duck egg white (DDEW) powders were produced by using a novel pulse-spouted bed microwave freeze dryer and a conventional freeze dryer The desalting process of the salted egg white was carried out in the presence or absence of ultrasound pretreatment The drying time microstructure apparent density color

Edited by Evangelos Tsotsas and Arun S Mujumdar Modern

9 3 3 Microwave-Assisted Freeze-Drying Equipment 290 9 3 4 Microwave-Assisted Spouted Bed Drying Equipment 291 9 4 Microwave-Assisted Drying Process 292 9 4 1 Moisture Loss 293 9 4 2 Temperature Distributions 295 9 4 2 1 Temperature Variations at Fixed Levels of Microwave Power 296 9 4 2 2 Temperature Variations at Variable Microwave Power

Effects of microwave-assisted pulse-spouted bed freeze-drying (MPSFD) on volatile compounds and structural aspects of Cordyceps militaris Wu XF(1)(2) Zhang M(1)(3) Bhandari B(4) Li Z(5) Author information: (1)State Key Laboratory of Food Science and Technology Jiangnan University Wuxi Jiangsu China

Kale fluidized bed drying caused a significant change in the examined colour parameters dependent on the drying temperature and on whether the impregnation was conducted or omitted In non-impregnated samples a brightening up of the materials after drying was noted ( L* parameter value decrease) the highest being at 70 C the lowest at 130

Souraki B A Andrs A and Mowla D Mathematical modeling of microwave-assisted inert medium fluidized bed drying of cylindrical samples carrot Chemical Engineering and Processing: Process Intensification 48 p 296 (2009) [ Links ] Stepien B Effect of vacuum-microwave drying on selected mechanical and rheological properties of carrot

Apr 16 2004The numerical analysis predicted a temperature‐leveling effect that was confirmed by experimental results The unique temperature leveling in MWSB drying helps to control product temperature and improves product quality as compared to microwave‐assisted fixed‐bed hot‐air drying methods

Drying Technology: Vol 36 No 14

Wave-absorbing material aided microwave freeze-drying of vitamin C solution frozen with preformed pores Wang et al AHP-based procedure for optimization of microwave-assisted blackberry sugar osmotic process ChunFang Song Evaluation of the air-borne ultrasound on fluidized bed drying of shelled corn: Effectiveness grain quality and

Sep 27 2014Advantages of Microwave-related Drying: adjustment of energy absorption level by the wet products automatically possible selective heating of the interior portions - (microwave focusing effect) rapid energy dissipation throughout the material relatively minor migration of water-soluble constituents lower product temperatures in combination

The effect of ultrasound assisted osmotic dehydration (USOD) with 5% salt solution as the osmotic solution with pulsed fluidized bed microwave freeze-drying (PFBMFD) of Chinese yam (Dioscorea opposita Thunb ) was studied Yam cubes were subjected to osmotic dehydration with different ultrasonic power (1 52 2 28 and 3 04 W/g) or without

Effects of microwave assisted hydrodistillation (MAHD) and conventional hydrodistillation (HD) methods on yield composition specific gravity refractive index and antioxidant and antimicrobial activities of essential oil of Rosmarinus officinalis L were studied The main aroma compounds of rosemary essential oil were found as 1 8-cineole and

The microwave assisted freeze drying is another recently used hybrid technique for various food products The use of MW-freeze drying results in much faster rates with very high product quality Recent review by Zhang et al [24] explains in detail the advances in microwave-assisted drying of vegetables fruits and aquatic products with a focus

Ginger (Zingiber Officinale Cv Suprava) slices (4 mm thick) were dehydrated at 25 40 50 and 60 C with three different microwave power levels viz 120 240 and 360 W in microwave assisted convective dryer up to 0 07 g moisture/g dry solid to observe the feasibility of microwave assisted convective drying for ginger

A method for conversion of carbon dioxide to carbon monoxide comprises: introducing a flow of a dehumidified gaseous source of carbon dioxide into a reaction vessel and irradiating dried solid carbonaceous material in the reaction vessel with microwave energy Heating of the irradiated carbonaceous material drives an endothermic reaction of carbon dioxide and carbon that

Dec 12 2012Drying uniformity microstructure apparent density rehydration and texture properties were measured to evaluate the quality of stem lettuce slices dried in a pulse-spouted bed microwave freeze dryer Drying was carried out in a 5-cm (o d ) vacuum chamber at 80 5 Pa mean microwave power level of 3 2 W g−1 and pulse-spouting time interval of 10 min Results show that microwave freeze

Heat Transfer and Fluidization Characteristics of Lignite

To address the problem of low drying efficiency increasing lignite dryer size a pulsation-assisted fluidized bed with horizontal tube bundles was built for investigating the heat transfer in lignite particles with the goal of enhancing the lignite drying rate by introducing a pulsed flow to increase the heat transfer rate Results showed that the pulsation-assisted flow increased the heat

Feb 25 2016ABSTRACTThe effect of flow pulsations is studied via a discrete element model on hydrodynamics of spouted bed which is being used in many important industries like drying processes Decreased horizontal air percolation and preserving upward momentum increased particle circulation increased particle traverse distance and better homogeneity are resulted

Mourad Asif Mohammad 2016 Effect of Frequency on Pulsed Fluidized Beds of Ultrafine Powders Journal of Nanomaterials 23 Amani H Asif M Hameed B H 2016 Transesterification of waste cooking palm oil and palm oil to fatty acid methyl ester using cesium-modified silica catalyst Journal of the Taiwan Institute of

Mourad Asif Mohammad 2016 Effect of Frequency on Pulsed Fluidized Beds of Ultrafine Powders Journal of Nanomaterials 23 Amani H Asif M Hameed B H 2016 Transesterification of waste cooking palm oil and palm oil to fatty acid methyl ester using cesium-modified silica catalyst Journal of the Taiwan Institute of

Design and optimization of a novel microwave assisted fluidized-bed dryer for making value-added products from vegetable residue Investigators : Raghavan (PI) Orsat Industrial Partner : Nutri-Pacs Inc 2013-2014 NSERC Engage $24 899 Evaluation of the different methods of using carbonates generated by the SmartCO2 technology as a source of CO 2

Vacuum freeze-drying of biological materials is one of the best methods of water removal with final products of highest quality The solid state of water during freeze-drying protects the primary structure and the shape of the products with minimal volume reduction In addition the lower temperatures in the process allow maximal nutrient and bioactive compound retention

The present study was aimed to determine the contribution of microwave and infrared drying mechanism in infrared-assisted microwave drying Bread dough samples were dried from 40 9 to 8% moisture content (wet basis) with microwave infrared and infrared-assisted microwave drying by using halogen lamp-microwave combination oven Microwave and/or halogen

9 3 3 Microwave-Assisted Freeze-Drying Equipment 290 9 3 4 Microwave-Assisted Spouted Bed Drying Equipment 291 9 4 Microwave-Assisted Drying Process 292 9 4 1 Moisture Loss 293 9 4 2 Temperature Distributions 295 9 4 2 1 Temperature Variations at Fixed Levels of Microwave Power 296 9 4 2 2 Temperature Variations at Variable Microwave Power

Background: Microwave-assisted pulse-spouted bed freeze-drying (MPSFD) uses microwave heating to substitute the customary conduction heating during freeze drying (FD) resulting in high-quality dried samples with a short drying time The aim of this study was to determine the effect of MPSFD on volatile compounds and structural aspects of

Apr 01 2019Wang et al (2013) developed microwave assisted pulse fluidized bed freeze-drying (MPFFD) which uses microwaves in a pulsed while fluidized mode to obtain rapid heating and higher quality product MPFFD uses microwave heating to substitute for the customary conduction heating during FD and its pulsed while fluidized mode can guarantee the uniformity of microwave heating

(ii) Microwave-Assisted Freeze Drying (MWFD) Freeze drying provides a good quality of the dried product by preventing the degradation of the thermosensitive compounds due to the low temperature used for the sublimation of water The major drawback of this technique is the very long drying time required

Aug 18 2017The restructured crisp cookies were made from the old stalks of Asparagus officinalis Temperature distribution expansion ratio moisture content and color were measured to evaluate the drying uniformity of the cookies by applying pulse-spouted microwave-assisted vacuum drying (PSMVD) and microwave-assisted vacuum drying (MVD)

Jan 08 2015mechanical drying system available in the market which are hot air convective drying freeze drying vacuum drying fluidized bed drying spray drying microwave drying vacuum assisted microwave drying microwave assisted fluidized bed drying Some of them are discussed in this review paper are given below- i