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| Gomes,Francileni P.; Osvaldo,Resende; Sousa,Elisabete P.; Oliveira,Daneil E. C. de; Araújo Neto,Francisco R. de. |
| ABSTRACT The aim of this paper was to analyze the drying kinetics, test the Akaike information criterion (AIC) and Schwarz’s Bayesian information criterion (BIC) in the selection of models, determine the effective diffusivity and activation energy of the crushed mass of ‘jambu’ leaves for different conditions of temperature and layer thicknesses. The experiment was carried out at the Food Laboratory of the Brazilian Agricultural Research Corporation (Embrapa) in Macapá-AP. Drying was carried out in air circulation oven with speed of 1.0 m s-1 at various temperatures (60, 70 and 80 ºC) and layer thicknesses (0.005 and 0.010 m). The experimental data were fitted to 11 mathematical models. Coefficient of determination (R2), mean relative error (P), mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vegetable; Convective drying; Acmella oleracea. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700499 |
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| Alam, Md. Shafiq; Singh, Amarjit; Chavan, Prasad. |
| Experiments were conducted to assess the effect of aonla shape, pre-treatment and drying air temperature on quality attributes of dried product. The aonla fruit was subjected to mechanical treatment to form three shapes i.e. spherical (whole pricked), cylindrical (15x35mm) and sheet (2 mm thickness) and were exposed to different pre-treatments i.e. untreated (UT), water blanching (WB), steam blanching (SB), blanching and sulphiting (B+S), sugar osmosis and salt osmosis prior to convective drying at temperature of 50, 60 and 70°C. The dried aonla (nearly 10% w.b) were analyzed for different quality attributes such as re-constitutional properties, vitamin C, colour and overall acceptability. The data indicated that re-constitutional properties, colour (L, a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aonla; Convective drying; Pre-treatment; Quality parameters. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3932 |
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| Nascimento,Vânia R. G.; Biagi,João D.; Oliveira,Rafael A. de; Arantes,Camila C.; Rossi,Luiz A.. |
| ABSTRACT This study aimed to evaluate the effects of using infrared radiation in the hot-air drying of Moringa oleifera grains on the inner dryer and grain temperatures, energy consumption, and grain quality. An experiment was conducted in a factorial scheme in 2013 to identify the optimum values of the air temperature (30 to 58 ºC) and infrared radiation application time (2.0 to 4.8 min) on moisture content, drying time, drying rate, inner dryer air temperature, grain temperature, energy consumption and quality of grains used as a natural coagulant for water treatment. The results obtained were moisture content from 4.40 to 4.76% wet basis; drying time from 0.50 to 2.00 h; drying rates from 0.70 × 10-3 to 2.05 × 10-3 kgwater kg-1 dry matter min-1; inner... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Convective drying; Energy consumption; Water turbidity; Natural coagulant. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001000768 |
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| Sousa,Elisabete P. de; Figueirêdo,Rossana M. F. de; Gomes,Josivanda P.; Queiroz,Alexandre J. de M.; Castro,Deise S. de; Lemos,Danielle M.. |
| ABSTRACT The aim of this work was to study the drying kinetics of pequi pulp by convective drying at different conditions of temperature (50, 60, 70 and 80 °C) and thickness (0.5, 1.0 and 1.5 cm) at the air speed of 1.0 m s-1, with no addition of adjuvant. The experimental data of pequi pulp drying kinetics were used to plot drying curves and fitted to the models: Midilli, Page, Henderson & Pabis and Newton. Effective diffusivity was calculated using the Fick’s diffusion model for a flat plate. It was found that, with increasing thickness, the drying time increased and, with increasing temperature, the drying time was reduced. The Midilli model showed the best fit to the experimental data of pequi pulp drying at all temperatures and thicknesses,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caryocar coriaceum Wittm; Thickness; Convective drying. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000700493 |
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| Khama, Réda; Aissani-Benissad, F; Alkama, R; Fraikin, L; Léonard, A. |
| This paper presents a mathematical modelling of thin layer drying of tomato (Solanum lycopersicum L.). To this end, two different methods are used to dehydrate tomato slices namely the solar drying (in an indirect solar dryer), and the forced convective drying (in a convective dryer). In the solar dryer, the experiments are carried out at a constant air velocity of 1 m/s and average temperatures of 37.2, 39.9, 42.5 °C. In the convective dryer, the experiments are performed with five different temperatures (30, 40, 50, 60 and 70 °C) at a constant air velocity of 1 m/s. In order to estimate and select the appropriate drying curve equation, fifteen different thin layer mathematical drying models available in the literature are applied to the experimental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solar drying; Convective drying; Tomato slices; Thin layer; Mathematical modelling; Curve Expert software.. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7407 |
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| Alam, Mohammed Shafiq; Gupta, kalika. |
| Abstract: Studies on modeling of thin layer drying kinetics of grape juice concentrate were conducted using pilot scale convective dryer. Experiments were conducted in temperature range of 55-750C and drying bed thickness of 3-7 mm, to attain desired moisture content (14±1% db). Different thin layer drying models like newton, page, logarithmic, two term, two term exponential and midilli models were fitted to the experimental data of convective dehydration and their adequacy of fit was investigated. All the samples witnessed falling rate period drying irrespective of the selected temperature and thickness. The effective moisture diffusivity and activation energy were found in range of 7.18-2.56 m2/sec and 26.07-21.59 kJ/mole respectively for 3-7 mm... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Convective drying; Drying kinetics; Drying models; Grapes; Quality parameters. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2822 |
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