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Publications (30)
Avocado, a native fruit from Mexico and Central America, is found in almost all tropical countries and consists of peel, pulp and seed. Avocado is a complementary food containing many lipophilic phytochemicals and bioactive compounds that may confer health benefits. The avocado seed represents 10% to 25% of its entire weight, depending on the fruit...
This work investigated the fluidized bed agglomeration of a plant protein powder blend using an açaí pulp binder in order to improve the physical and handling properties. The blend was prepared mixing isolated pea protein powder and concentrated rice protein powder. The influence of air temperature and binder flow rate on the moisture content, part...
The major residue from beer production is the brewer’s spent grain (BSG). At present, BSG is mainly used as feed for cattle. Spent grains have been considered as a potential source of protein and energy for human nutrition. For such use, BSG must be dried to reduce its mass and increase its shelf life. In this study, the drying kinetics of BSG were...
The drying behaviour of monoammonium phosphate fertilizer was examined in a static tray dryer, establishing kinetic parameters that may be used to improve the design of dryers. Drying temperatures were from 80 to 95°C, and surface air velocity was 0.50 m/s. The material was previously separated into two particle sizes between 1.40 and 2.38 mm mean...
In this work, diclofenac sodium pellets were produced through an extrusion/spheronization process and subsequently coated in a fluidized bed coater column with a Wurster insert. The aim of this work was to study the coating of pellets with two commercial aqueous enteric polymer suspensions, Advantia® Performance and Acryl-Eze® MP. The coating proce...
The objective of this work was to study the coating process of nifedipine extended release pellets using Opadry and Opadry II, in a fluid bed coater with a Wurster insert. The coating process was studied using a complete experimental design of two factors at two levels for each polymer. The variables studied were the inlet air temperature and the c...
This review presents a compilation of works of the main techniques for monitoring and control fluidization regimes, particle size and moisture content during coating and granulation processes in the fluidized bed. The development of monitoring and control systems for coating and granulation of particles is highly desirable, not only to allow the op...
The objective of this work was to study the coating process of diclofenac sodium pellets, with the commercial aqueous coating suspension for enteric release – Acryl-Eze® MP, in a fluid bed coater with a Wurster insert. Coating experiments were performed following a 22 factorial design to determine the influence of process variables on coating perfo...
The consumption of fresh or industrialized coconut water (Cocos nucifera L.) in Brazil has been increasing. As a consequence, millions of tons of coconut husk are discarded each year, which constitutes a serious environmental problem. Studies carried out in our laboratories showed that the pulp rejected with the husk presents interesting properties...
Sodium acetate crystals obtained from the reaction of acetic acid with sodium hydroxide are usually dried in rotary or fluidized beds. In this study, a batch pulsed fluid bed dryer with a 0.18 m2 cross-sectional area was used in an attempt to reduce energy consumption and increase productivity. Drying curves of sodium acetate were determined for di...
In this work, a four-section pulsed fluid bed apparatus with a 0.18 m2 cross-section area was used to investigate the influence of pulsed-fluidization variables on the drying process of molecular sieves, a test material that was chosen because it presents an initial constant drying rate period. A two-level factorial design was developed to evaluate...
A four-section pulsed fluid bed (PFB) dryer was employed in the film coating of granules. Particles of 1.28 and 1.62 mean diameter, containing, respectively, 6.8 and 9.2% of theophylline, were coated with a commercial polyvinyl acetate aqueous dispersion (Kollicoat SR 30 D, by BASF). The release profiles were related to the pulsation frequency (500...
Fresh carioca beans (Phaseolus vulgaris) were submitted to convective drying in a pulsed fluidized bed (PFB) dryer. A full factorial design was developed in order to analyze the effects of the following process variables on the kinetic parameters of the Page’s equation: inlet air temperature, airflow rate and frequency of pulsation. The only signif...
In the pulsed fluid bed drying technique, a constant airflow rate is supplied to the dryer. A gas distributor is installed upstream of the drying chamber to provide the pulsed flow by relocating the gas stream. In this paper, a four-section batch pulsed fluid bed apparatus with a 0.18 m≤ cross section area is described. It was used to investigate t...
Wet crystals of magnesium sulfate are usually dried in conventional fluidized beds or rotary dryers. In this work, a four-section batch pulsed-fluid bed (PFB) dryer with a 0.18 m² cross section area was used. In this piece of equipment, a constant airflow rate is supplied to the dryer. A rotating valve installed upstream of the drying chamber distr...
Na produção de massas alimentícias, a etapa de secagem tem grande importância do ponto de vista de qualidade do produto, assim como nos aspectos econômicos. O objetivo do presente trabalho foi avaliar um equipamento desenvolvido para a secagem de massas alimentícias curtas com a utilização de microondas, visando à redução do tempo de secagem em com...
