21st International Drying Symposium

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https://riunet7pre.upv.es/handle/10251/116514

Similarly to its previous biennial IDS conferences, the objective of IDS2018 is to provide the most advanced and comprehensive global forum for disseminating results and data in research, development and applications in drying/dewatering sciences and technologies.

This Symposium will be held on the main campus of the Universitat Politècnica de València, deemed among the best Spanish technical universities and ranked among the best 100 Institutions in the world in the field of Agriculture and Forestry. The conference aims to bring together world-renowned researchers and engineers, both from academia and industry, in this university environment. An Awards program will also form part of the event for the international drying community.

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Now showing 1 - 20 of 254

A green coffee based product and its comparasion to commercial products regarding the antioxidant capacity
(Editorial Universitat Politècnica de València, 2018-09-07) Souza, F.; Souza, E.; Pontes, S.; Leal Junior, W.; Freitas-Silva, O.; Nogueira, R.; Coordenaçao de Aperfeiçoamento de Pessoal de Nível Superior, Brasil; Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
[EN] Green Coffee Products (GCP) consumption have been increased recently and is justified due its benefits to human health, as the antioxidant activity and thermogenic properties and ant mutagenic and ant carcinogenic capacity and also present alleged weight loss control. The aim this work was to elaborate a GCP with Coffea canephora by spray drying and compare its antioxidant capacity to commercial GCP samples by ORAC methodology. The results presented a range of 33.02 – 2,408.05 µmol Trolox/g for commercial products and 1,861.91 µmol Trolox/g for the product obtained in this work.
A mathematical model of spray drying granulation process in formulation
(Editorial Universitat Politècnica de València, 2018-09-07) Kagami, Hiroyuki
[EN] In this study, we apply the drying model of polymer solution coated on a flat substrate to the spray drying granulation process in formulation. In order to apply the former model to the drying of this spherical object, we consider this spherical object to be a stack of solution films applied on the spherical shell and discuss the drying process of each solution film. As a result, we see that the smaller the radius of curvature of the droplet, the more the fine particles tend to be unevenly distributed on the surface of the droplets during drying.
A physical interpretation of the use of fractional operators for modelling the drying process
(Editorial Universitat Politècnica de València, 2018-09-07) Perre, Patrick; Turner, Ian; Australian Research Council
[EN] Fractional order derivatives provide useful alternatives to their integer order counterparts due to their ability to model memory and other properties of the porous medium, such as nonlocal behaviour. These phenomena are driven by the constrained interactions within the complex and non-homogeneous microstructures evident at the pore scale. In this work, we investigate the suitability of time and space fractional operators for modelling drying processes and provide a physical interpretation of these operators. At first, the concept and the general formulation in the case of a 1-D finite domain is summarised. Then a selection of simulations allowed us to analyse the physical effects of these operators on the solution. In particular, we elucidate:(I )the ability of these operators to break the fundamental relationship between mean square displacement and time in the simple example of diffusion in an open space, (ii) the caution to be taken with the formulation of boundary conditions and source terms to obtain consistent balance equations, (iii) the effect of fractional in space diffusion as a way to alter the MC profiles compared to standard diffusion, therefore potentially avoiding the dependence of the diffusivity on the variable
A pore-scale study on the drying kinetics and mechanical behavior of particle aggregates
(Editorial Universitat Politècnica de València, 2018-09-07) Pham, T. S.; Chareyre, B.; Tsotsas, E.; Kharaghani, A.
[EN] A discrete thermo-mechanical drying model is developed to investigate the interaction between the porous structure and the drying characteristics of dense particle aggregates. The solid phase consists of polydisperse spherical particles in the micrometer range and the void space is constructed by a complementary network of tetrahedral pores. A modified version of the classical invasion percolation algorithm is set up to describe the preferential evaporation of the confined liquid in the pores. Thus, the evolution of the liquid distribution throughout the complex disordered medium can be simulated. In a one-way coupling scheme, capillary forces caused by both fluid pressure and surface tension are computed over time from the filling state of pores and they are applied as loads on each primary particle in the discrete element method. Based on this robust approach the drying kinetics and the mechanical behavior of several different aggregates with various fractions of small and large particles are simulated and quantified.
Agglomeration of hydrolyzed collagen with blackberry pulp in a fluidized bed
(Editorial Universitat Politècnica de València, 2018-09-07) Viegas, Thayná; Taranto, Osvaldir
[EN] Hydrolyzed collagen (HC) is a fine powder applied in the pharmaceutical and food industries which has shown good results in the treatment of diseases related to bones, skin and joints. In this study, HC particles were agglomerated in order to increase particle size, optimizing its use as a food ingredient, its handling and its storage. Agglomeration is a process that not only enlarge the size of fine particles, but also improves its properties, such as instantanization time and flowability. The aim of this work was the agglomeration of HC in a fluidized bed having blackberry pulp as a liquid binder. A full factorial design 22 was used to study the effect of the temperature of the fluidizing air (60, 70, 80ºC) and the flow rate of the liquid binder (0.8, 1.2, 1.6 mL/min) on the process yield, mean particle size, water activity and total anthocyanins content. It was observed that anthocyanins content from the blackberry pulp had higher values with lower temperatures. Water activity had lower values with higher temperatures, but in all conditions, it was lower than 0.6. The enlargement of the granules was observed in all conditions studied, increasing up to 275%. Process yield varied from 67,9 to 80,0%. In all conditions, the instantanization time and flowability improved compared to hydrolyzed collagen before agglomeration.
Agitated thin-film drying of spinach juice
(Editorial Universitat Politècnica de València, 2018-09-07) Qiu, Jun; Boom, R. M.; Schutyser, M.A.I.
[EN] Agitated thin film dryers (ATFD) has been considered as an effective technology for drying viscous liquid foods, pastes or pureed foods. In this study, a lab-scale ATFD was developed and applied for drying of juices from spinach leaves at varying temperature (60 – 90 ˚C), feed rate (0.3 – 0.5 kg/h) and blade rotation speed (300 – 600 RPM) combinations. Juice suspensions were successfully dried into powder with a moisture content ranging from 0.049 to 0.114 kg/kg total. Increasing the wall temperature and feed rate were found to improve the specific evaporation rate and evaporation rate of the ATFD, respectively. The blade rotation speed had limited effect on the water removal rate, while it played a crucial role in powder formation.
Ambient temperature drying of therapeutic protein solution with use of microwave
(Editorial Universitat Politècnica de València, 2018-09-07) Tsuruta, Takaharu; Ogawa, Takuma; Abe, Ryosuke; Tanigawa, Hirofumi; Ministry of Education, Culture, Sports, Science and Technology, Japón
[EN] High quality drying of therapeutic protein-solution is important in medical and pharmaceutical processing. Freeze-drying is mostly used, but it takes a long drying-time and causes damages of protein structures. In order to improve the drying quality, we propose a microwave vacuum drying performed at ambient temperatures under low-pressure conditions. We are focusing on the Parma-Zyme method for the evaporative drying of protein solutions such as egg white or lysozyme with vitrification. Circular dichroism (CD) spectroscopy is used to detect protein conformation changes due to the drying, and it is found that the ambient temperature drying can preserve the protein conformation.
Application of microwaves in the convective drying of ceramic
(Editorial Universitat Politècnica de València, 2018-09-07) Rajewska, Kinga; Pawłowski, Andrzej
[EN] The paper demonstrates microwave and convective drying processes in different combinations of kaolin cylindrical samples in laboratory scale. Analysis of the kinetics and sample temperature evolution show that the moment of application and electromagnetic field duration have the biggest influence on characteristics of the drying curve and quality of dried material. Dried samples were subjected to strength tests using the Brazilian method in order to determine the relation between its quality and different drying programs.
Application of Multivariate Image Analysis to Thermal Images for in line Monitoring of the Freeze-Drying Process
(Editorial Universitat Politècnica de València, 2018-09-07) Colucci, Domenico; Prats-Montalban, José; Fissore, Davide; Ferrer Riquelme, Alberto
[EN] A new Process Analytical Technology (PAT) has been developed and tested for on-line process monitoring of a vacuum freeze-drying process. The sensor uses an infrared camera to obtain thermal images of the ongoing process and multivariate image analysis (MIA) to extract the information after automatic detection and segmentation of the region corresponding to the product in every vial. A reference model was built, using the information of six batches, and different kind of anomalous events, involving either single vials in the batch or the whole batch, were simulated to test the capacity of the MIA-based monitoring system to promptly identify them.
Aroma retention during drying of caja-umbu fruit pulp
(Editorial Universitat Politècnica de València, 2018-09-07) Fontes, Anderson; Leite-Neta, Maria Terezinha; Matos, Patricia; Araújo, Hannah Caroline; Jesus, Monica; Rajkumar, G.; Narain, Narendra
[EN] This study was aimed to obtain and characterize the dried powder of cajá-umbu (Spondias spp) fruit pulp obtained by spray-drying and lyophilization. Spray-drying of the pulp was done at different temperatures. Analysis of bioactive compounds and volatile compounds was performed. The total phenolic compounds content was high in the dried powder obtained at the temperature of 140 °C. The volatiles analysis of dried powders revealed that the powder dried at 140°C contained a larger number of compounds. The cajá-umbu powder showed that it is a better alternative for storage and conservation since it retained the majority of volatile compounds.
Assessment of the conditions of the thermoplastic extrusion process in the bioactive and mechanical properties of flexible films based on starch and Brazilian pepper
(Editorial Universitat Politècnica de València, 2018-09-07) Fakhouri, Farayde; Freitas deLima, Fernando; Cardoso, Claudia; Martelli, Silvia; Antunes, Marcelo; Mei, Lucia; Yamashita, Fabio; Velasco, Jose
[EN] The objective of this work was to produce, through the thermoplastic extrusion process followed by blowing, manioc starch-based flexible films added with Brazilian pepper oil as an antioxidant and plasticizer agent, and verify if the bioactive compounds contained in the fresh pepper oil are present after the drying step of the thermoplastic extrusion. After analysis by gas chromatography-mass spectrometry volatiles compounds were identified in the films. Pepper oil also influenced the mechanichal properties of the films.These results suggest that the temperatures used in the process, kept some of the existing compounds in the Brazilian pepper essential oil adhered to the packages.
Augmenting natural convection and conduction based solar dryer
(Editorial Universitat Politècnica de València, 2018-09-07) Chavan, A.; Sikarwar, A.; Tidke, V.; Thorat, B.
[EN] Solar conduction dryer (SCD) is a unique technology that uses conduction, convection and radiation mechanism of heat transfer making it one of the most efficient drying system. The SCD is one of the most effective piece of equipment’s designed indigenously and it has tremendous potential to capitalize in erstwhile nations of tropical and torrid region where there is abundance of solar insolation. SCD, the most cost-effective dryer which runs on no electricity has already made inroads in the global market. In the present study, CFD studies were carried out for a given geometry and the corresponding boundary conditions.
Beyond freeze-drying of biologics: vacuum-foam drying and spray freeze-drying
(Editorial Universitat Politècnica de València, 2018-09-07) Langford, A.; Balthazor, B.; Bhatnagar, B.; Tchessalov, S.; Hageman, M.J.; Lukas, A.; Plitzko, M.; Luy, B.; Ohtake, S.
[EN] The complexity of biotherapeutics in development continues to increase as our capability in discovery and recombinant technology improves. While safety and efficacy remain the two critical aspects of all therapeutics, ensuring adequate stability is a challenge. Freeze-drying is a commonly-used processing technique to enhance the stability of biotherapeutic products, although the lengthy process time and low energy efficiency have led to the search for, and evaluation of, next-generation drying technologies, including spray freeze-drying and vaccum-foam drying. Both processes result in dosage forms that vary considerably from those produced by lyophilization and possess physical properties that may be deemed superior for their intended applications.
Bioavailability of freeze-dried and spray-dried grapefruit juice vitamin C
(Editorial Universitat Politècnica de València, 2018-09-07) Camacho Vidal, Mª Mar; Igual Ramo, Marta; Martínez-Lahuerta, Juan José; Martínez Navarrete, Nuria; Dpto. de Tecnología de Alimentos; Instituto Universitario de Ingeniería de Alimentos (FoodUPV); Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Grupo de Investigación e Innovación Alimentaria; Ministerio de Economía y Competitividad
[EN] An alternative as to offer higher stable and easy handling than fresh fruit is in powdered form, as long as the process used to obtain it ensures a high quality product. The objective of this study was to compare the bioavailability of the vitamin C of a juice prepared from powdered grapefruit obtained by freeze-drying and by spray-drying. A trial was conducted with 11 healthy volunteers. A relative increase of 1,4 – 25,8 % of blood serum vitamin C concentration was quantified after juices intake, with no significant differences (p>0.05) due to the process used to obtain the powder. K
Biodrying process: a sustainable technology for treatment of municipal solid wastes organic fraction
(Editorial Universitat Politècnica de València, 2018-09-07) Kechaou, Nabil; Ammar, E
[EN] The Municipal Solid Waste of Agareb (Sfax –Tunisia), characterized by high organic fraction and moisture contents is the most worrying pollution source that must be managed by innovative treatment and recycling technologies. Bio-drying, as a waste to energy conversion technology, aims at reducing moisture content of this organic matter. This concept, similar to composting, is accomplished by using the heat generated from the microbial degradation of the waste matrix, while forced aeration is used. The purpose of this work was to reduce the moisture content of the waste, by maximizing drying and minimizing organic matter biodegradation, in order to produce a solid recovered fuel with high calorific value.
Blackberry pulp microencapsulation with arrowroot starch and gum arabic mixture by spray drying and freeze drying
(Editorial Universitat Politècnica de València, 2018-09-07) Nogueira, Gislaine; Fakhouri, Farayde; de Oliveira, Rafael
[EN] The objective of this research work was to obtain blackberry pulp powder (BL, without encapsulating agent) and microencapsulated blackberry pulp (ML, with encapsulating agent :mixture of starch arrowroot and gum arabic (1:1)) obtained by freeze drying and spray drying and evaluate their physico-chemical properties. The yield of blackberry freeze drying process was higher than the value found for spray drying process. The presence of encapsulating agent and drying method used for producing the powders influenced the average particle size, diameter, hygroscopicity, solubility, wettability and anthocyanin content of the powders.
Bread preservation with use of edible packaging
(Editorial Universitat Politècnica de València, 2018-09-07) Silva, Viviane; Fakhouri, Farayde; Arias, Luna; Aguiar, Rosa; Oliveira, Rafael
[EN] We live in a world that usually use plastic bags either to go shopping or to pack the snack for a short trip. However, packaging makes life easier and serves as protection for products such as food. Bread is a common food product that needs packaging in order to be protected at storage and transportation. Therefore, with aim of reducing petroleum derived packagin g consumption it was developed an edible film from potato starch to packeg bread and some quality characteristics like water content, firmness and weight loss were evaluated, showing that edible film can be used as a packaging.
Bubble behavior of fructooligosaccharides syrup during the belt drying process
(Editorial Universitat Politècnica de València, 2018-09-07) Zhao, Lijuan; Wang, Dandan; Du, Tengfei; Yang, Junhong; Li, Jianguo; Wu, Zhonghua
[EN] This paper is aiming to study experimentally the bubbling and drying characteristic of fructooligosaccharides syrup in the belt drying process. A series of bubble images were acquired by a high-speed image acquisition system during the drying process. By analyzing the characteristics of bubble and drying, the drying process of fructooligosaccharides was divided into three periods: boiling transfer, natural convection and conduction and diffusion period. The drying rate in different transfer stage was: boiling transfer > natural convection > heat conduction and diffusion. The results of the study are of reference value to belt drying.
Capillary disconnect during drying in model porous media at different wettability
(Editorial Universitat Politècnica de València, 2018-09-07) Rufai, Ayorinde; Crawshaw, John; Petroleum Technology Development Fund, Nigeria; Qatar Carbonates and Carbon Storage Research Centre; Qatar Petroleum; Shell Global Solutions International B.V.; Qatar Science and Technology Park
[EN] We carried out drying studies on a 2.5D micromodel based on a thin section of a carbonate rock to investigate the impact of wettability on the capillary disconnect, the moment when liquid films de-pin from the external evaporating surface. While this is coincident with the transition to low evaporation rate (diffusion limited) for deionized-water, our experiments show, the corner wetting films persisted after the transition to low evaporation rate for both water-wet and mixed-wet micromodels for brine, as solid salt continued to build up at the external evaporating surface. Fully oil wet micromodels showed a drying rate transition coincident with de-pinning.
Cellulosic fibre drying: fundamental understanding and process modeling
(Editorial Universitat Politècnica de València, 2018-09-07) Mondal, Sabyasachi; Agarwala, Puja; Dutta, Suvankar; Naik-Nimbalkar, Vishvas; Pande, Pratik; Dhumal, Sunil; Grasim Industries Limited
[EN] Process modeling of conveyer dryer for cellulosic fibre drying demands many fundamental insights. Present study highlights detailed cellulosic fibre drying aspects like mass transfer correlation relating mass transfer rate with process conditions, normalized drying curve and critical moisture content. Cellulosic fibre drying follows falling rate period, where rate of mass transfer decreases with moisture content. Conveyer dryer process model for commercial cellulosic fibre drying was developed and validated successfully. Moderate drying strategy derived based on developed process model and drying fundamentals was deployed at commercial scale which helped in reducing the moisture variability.

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