Physical and physiological quality of intermittent soybean seeds drying in the spouted bed

Brito, Ronaldo Correia de; Zacharias, Marina Barros; Forti, Victor Augusto; Freire, José Teixeira

doi:10.1080/07373937.2020.1725544

Cited by 21 publications

(13 citation statements)

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“…The monitoring of the parameters of temperature, relative humidity, and water content of the seeds is decisive for maintaining quality throughout storage [6][7][8]. Seeds quality cannot be improved during storage, but a temperature-and relative humidity-controlled environment allows preserving the seeds until the appropriate period for sowing, without reducing quality [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Adaptation of technological packaging for conservation of soybean seeds in storage units as an alternative to modified atmospheres

et al. 2020

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This study aimed to evaluate the quality of seeds of RR and RR2 PRO soybean cultivars stored in ambient air with raffia packaging (ANER), ambient air with laminated packaging (ANEL), modified atmosphere with polyethylene packaging (AMEP), refrigerated atmosphere (1 to 3°C) with raffia packaging (ARER), refrigerated atmosphere (1 to 3°C) with laminated packaging (AREL), and modified (-14 PSI) and refrigerated (1 to 3°C) atmosphere with polyethylene packaging (AMREP), over 6 months of storage. Results showed that the seeds of cultivar RR2 were preserved with better physiological quality. Raffia and polyethylene packaging under natural storage conditions, in a refrigerated and modified atmosphere, did not preserve the seed quality over the storage period. The conditions of storage in ambient air with laminated packaging (ANEL) and in a refrigerated atmosphere with laminated packaging (AREL) reduced the environmental effects of temperature and relative humidity, leading to better results of physiological quality of the seeds. Storage time negatively influenced the physiological quality of seeds, except for AREL and ANEL, which maintained the quality close to that of the initial conditions, over the 6 months of storage. The best alternatives for soybean seeds storage over 6 months are the laminated packaging in a natural environment, matching the refrigerated conditions. The technological laminated packaging can be used as a new alternative for conserving soybean seeds in processing and storage units.

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Section: Introductionmentioning

confidence: 99%

Adaptation of technological packaging for conservation of soybean seeds in storage units as an alternative to modified atmospheres

et al. 2020

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“…The apparent density (ρ b = 1210 kg m –3 ) and the average diameter ( d pe = 6.6 ± 0.3 mm) of the seeds have been determined by the displacement method using toluene and image processing, respectively. Such batches correspond to a static bed height ( H 0 ) of 0.17 m. Figure shows the experimental unit used, which has been described in detail in a previous paper …”

Section: Methodsmentioning

confidence: 99%

“…In this study, the intermittency ratio is defined as the ratio of the resting period (τ off ) to the total drying time (τ off + τ on ) in each 20 min cycle. All of the experiments were carried out in duplicate, and more details about the experimental procedure are given in a previous paper …”

Section: Methodsmentioning

confidence: 99%

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Intermittent Drying of Soybeans in Conical Spouted Beds: Modeling Approach

Brito

Tellabide

Atxutegi

et al. 2023

Ind. Eng. Chem. Res.

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Intermittent drying is a promising methodology to conventional drying which offers benefits related to energy and better-quality products. However, modeling of this technique remains a challenge. Thus, this study aims to propose a fully predictive model for intermittent drying in conical spouted bed dryers. A single-phase model is used to account for the heat and mass transfer on the soybean surface and their inside, and the predictions are compared with the experimental results. The proposed model provides physically consistent results and is coherent with the experimental data, mainly for drying under moderate air temperatures with moderate and long resting periods. As the average moisture content and the average particle temperature are estimated based on the spatial discretization used in the numerical solution, as well as on the boundary conditions adopted, the internal gradients of moisture and temperature are also estimated by the model, thus providing a physically consistent representation of the internal gradient behavior. Therefore, this study describes the successful application of an accurate model for continuous and intermittent drying. Accordingly, it contributes to obtain optimal drying parameters in order to minimize drying costs and improve product quality.

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“…This characteristic behavior leads to a high degree of agitation and mixing between the phases, enhancing the rates of heat and mass transfer. Thus, these features allow the spouted bed application in a wide range of chemical and physical operations, e.g., particle coating, − catalytic reactors, , and pyrolysis, − as a solids feeder in pneumatic conveying lines and drying of solids, pastes, and suspensions. − …”

Section: Introductionmentioning

confidence: 99%

Fluid Dynamic Analysis of a Modified Mechanical Stirring Spouted Bed: Effect of Particle Properties and Stirring Rotation

AzevedoBarros

Brito

Freire

et al. 2020

Ind. Eng. Chem. Res.

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The purpose of this study is to perform the fluid dynamic analysis of a modified mechanical stirring spouted bed, which has been proposed as a promising alternative to the conventional spouted bed. Thus, a comparison is also performed between the dynamic behaviors of such equipment. The addition of the stirrer to the spouted bed enhanced the movement of particles in the bed. The mechanical stirring spouted bed presented better performance than the conventional configuration at stirrer rotations above 90 rpm. Small particles were less susceptible to the effect of stirrer rotation than large particles, demanding a higher rotation to provide a lower minimum air flow rate. The proposed model provided good predictions in terms of maximum pressure drop and minimum air velocity in the modified mechanical stirring spouted bed. The findings of this study contribute to the development of versatile and promising equipment for different processes and operations, providing the key parameters for an appropriate design.

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Physical and physiological quality of intermittent soybean seeds drying in the spouted bed

Cited by 21 publications

References 50 publications

Adaptation of technological packaging for conservation of soybean seeds in storage units as an alternative to modified atmospheres

Adaptation of technological packaging for conservation of soybean seeds in storage units as an alternative to modified atmospheres

Intermittent Drying of Soybeans in Conical Spouted Beds: Modeling Approach

Fluid Dynamic Analysis of a Modified Mechanical Stirring Spouted Bed: Effect of Particle Properties and Stirring Rotation

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