Experimental study and simulation of mass distribution of the covering layer of soybean seeds coated in a spouted bed

Duarte, Cláudio Roberto; Neto, José Luiz Vieira; Lisboa, M. H.; Santana, R. M.; Barrozo, M. A. S.; Murata, V. V.

doi:10.1590/s0104-66322004000100007

Cited by 60 publications

(44 citation statements)

References 3 publications

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“…The selection of the model that best predicted the drying kinetics considered: the significance of the parameters; residues distribution and the correlation coefficient (Duarte et al, 2004).…”

Section: Determination Of Total Flavonoids Content (Tfc)mentioning

confidence: 99%

Changes of antioxidant constituents in pineapple (Ananas comosus) residue during drying process

Silva¹,

Nogueira²,

Duzzioni³

et al. 2013

Industrial Crops and Products

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Section: Determination Of Total Flavonoids Content (Tfc)mentioning

confidence: 99%

Changes of antioxidant constituents in pineapple (Ananas comosus) residue during drying process

Silva¹,

Nogueira²,

Duzzioni³

et al. 2013

Industrial Crops and Products

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“…A number of factors, including pH, oxygen concentration, moisture content, temperature and metallic acid catalysts (Uddin et al, 2002), influence vitamin C activity. One of the food industry goals is to preserve the maximum product nutrient content during processing and storage (Duarte et al, 2004), and, according to Gregory (1996), this may be evaluated using ascorbic acid as an index of the nutrient quality.…”

Section: Introductionmentioning

confidence: 99%

Drying kinetics, structural characteristics and vitamin C retention of dedo-de-moça pepper (Capsicum baccatum) during convective and freeze drying

Véras

Béttega

Freire

et al. 2012

Braz. J. Chem. Eng.

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-The main objective of this study was to evaluate the effect of the drying process on the vitamin C levels and physical properties of dedo-de-moça pepper. The drying kinetics and the structural properties were determined as a function of moisture content. Convective drying was compared with freeze-drying in terms of product quality, structural properties, retention of vitamin C and rehydration characteristics. Empirical and semi-empirical equations were used to describe the drying and rehydration kinetics. Nonlinear analysis applied to results of convective drying, based on curvature measures and bias measures, showed that the only equation that gives good inference results based on least squares estimators is the Overhults equation. The characterization of the rehydration process was done by determining the indexes that take into account the water absorption capacity and solutes losses. The material dried by lyophilization show greater potential to rehydrate.

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“…The atomizing nozzle was positioned above the fountain in a radial position of 0.66R from the centre, where R is the radius of the cylindrical part of the bed. The off-centre radial position (0.66R) for the nozzle atomizer was chosen based on the results obtained by Duarte (2001), which verified that in this position a smaller elutriation and a greater efficiency of the atomized material is obtained. A draft tube was used to avoid the return of the seeds to the spout region, before reaching the base of the bed.…”

Section: Methodsmentioning

confidence: 96%

The Use of a Population Balance Model in the Study of Inoculation of Soybean Seeds in a Spouted Bed

2004

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T he coating and encapsulating of particles presents many applications in the chemical, pharmaceutical, food and agricultural products industries. The objective is to apply a thin and uniform layer of material on the surface of a body (Picollo et al., 1997). Among the many applications of seeds coating, the enlargement of small seeds is included in order to facilitate the planting, the addition of herbicides, fungicides, fertilizers, micronutrients and inoculation (Liu and Lister, 1993).The spouted bed has often been used in studies related to the coating of particles. The cyclical motion of the material, which promotes a fast axial mixture of particles and an excellent gas-particle contact, are the reasons for the use of this technique for particles coating (Freire and Oliveira, 1992). Coating of Soybean SeedsThe coating of seeds in a spouted bed has been the purpose of several studies. Liu and Lister (1992) studied coating mass distribution from a spouted bed seed coater. Conceição studied the influence of operational variables of the process on the soybean seeds coated with fertilizers and macronutrients (MAP and KCl).Lucas (2000) studied the inoculation of soybean seeds with Bradyrhizobium bacteria and the effects of some process variables on the final quality of the seeds and plants. These bacteria adhere to the plant's roots as nodules and supply the necessary of nitrogen, dispensing with the use of ammoniacal fertilizers. The Molybdenum and Cobalt micronutrients were incorporated into the bacteria in suspension, due to their low concentration in Brazilian soils and their importance for the soybean culture.The knowledge about coating distribution is of primary importance because very thick layers impair the germination of seeds by impeding the gaseous interchanges, while the very thin ones do not ensure the ideal activity of bacteria in the process of nitrogen fixation and may not contain the ideal amount of micronutrients. The ideal amount of bacteria is 8 × 10 -5 kg/kg of seeds and of micronutrients is 1.6 × 10 -3 kg/kg of seeds. The ideal bacteria count is 1 × 10 11 cells/kg of coating.Therefore, the objective of this work was to simulate the coating mass distribution of soybean seeds covered with inoculum and micronutrients in a spouted bed through a population balance model based on the general model described by Randolph and Larson (1988 Materials and Methods MaterialsSoybean seeds, Vencedora variety, were used with a germination rate of 96.8±0.8%. The concentration of the slurry (C S ) used as a coating suspension was 1.3 × 10 6 kg of solids/m 3 of slurry, being 95% solid micronutrients and 5% inoculum. The commercial product used forThe coating of soybean seeds with bacteria and micronutrients favours the vigorous growth of the plant, dispensing with the use of ammoniacal fertilizers. The optimum thickness of the coating should allow the fundamental gaseous interchanges for the germination and the ideal conditions for the activity of the bacteria. The objective of this work was to simulate dynamic...

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Experimental study and simulation of mass distribution of the covering layer of soybean seeds coated in a spouted bed

Cited by 60 publications

References 3 publications

Changes of antioxidant constituents in pineapple (Ananas comosus) residue during drying process

Changes of antioxidant constituents in pineapple (Ananas comosus) residue during drying process

Drying kinetics, structural characteristics and vitamin C retention of dedo-de-moça pepper (Capsicum baccatum) during convective and freeze drying

The Use of a Population Balance Model in the Study of Inoculation of Soybean Seeds in a Spouted Bed

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