Effects of drying air temperature and grain initial moisture content on soybean quality (Glycine Max (L.) Merrill)

Coradi, Paulo Carteri; Fernandes, Carlos Henrique Portela; Helmich, Jean Carlos; Goneli, André Luís Duarte

doi:10.1590/1809-4430-eng.agric.v36n5p866-876/2016

Cited by 18 publications

(15 citation statements)

References 15 publications

(14 reference statements)

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“…A reduction in the water content of the grains diminishes their biological activity and microbiological, physical and chemical changes during storage. Moreover, the grains subjected to the drying process undergo contraction, which directly affects their physical properties and reduces their physical and chemical quality (Coradi, Fernandes, Helmich, & Goneli, 2016a;Niamnuy, Nachaisin, Poomsa, & Devahastin, 2012).…”

Section: Introductionmentioning

confidence: 99%

<b>Validation of an experimental prototype of thick-layer fixed bed dryer and determination of the quality of the dried soybean grains

Coradi

Lemes

2018

Acta Sci. Agron.

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ABSTRACT. The aim of this study was to validate an experimental prototype dryer with a thick-layer fixed bed and determine the quality of the dried soybean grains. The drying system was designed as a chamber with four independent drying cells, with a capacity of 164 kilograms, an air ventilation system and heating with electric heaters. This prototype was used for soybeans with an initial water content of 17% (w.b.). The samples were collected from the top, middle and bottom of the four cells to evaluate the quality of the grains. The experimental design was completely randomized factorial (3 x 4 x 3), with three temperatures settings for the drying air (30, 40, and 50°C), four drying cells and three evaluation positions (upper, middle and lower). The grains did not undergo quality changes as a function of the drying cells. In the upper part of the drying cells, there was a reduction in the specific grain mass (851 kg m -³), an increase in electrical conductivity (140.02 μS cm, reduction in germination (63%) and oil content (7%) compared with the middle and lower dryer positions. The experimental prototype of the fixed bed dryer allowed a uniform distribution of the heated air in the drying cells, which was effective in the drying operation and in maintaining the quality of the soybean grains.Keywords: control and optimization of the drying; loss reduction of grain quality in the drying; yield of the drying processes.

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Section: Introductionmentioning

confidence: 99%

<b>Validation of an experimental prototype of thick-layer fixed bed dryer and determination of the quality of the dried soybean grains

Coradi

Lemes

2018

Acta Sci. Agron.

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“…Насіння кукурудзи, порівняно з насінням інших зернових культур, збирається з підвищеною вологістю, тому й виникає необхідність негайного його сушіння (Jokiniemi & Ahokas, 2014;Barrozo et al, 2014;Chauhan et al, 2017). Сушіння насіннєвої кукурудзи проводять в качанах, у спеціальних камерних сушарках, за відносно низьких температурних режимів, які попереджують травмування насіння (Abasi & Minael, 2014;Coradi et al, 2015;Coradi et al, 2016). Від цього процесу залежить якість насіння, його посівні та врожайні властивості, збереження, вартість посівного матеріалу (Claumann et al 2017;Suleiman et al, 2018).…”

Section: вступunclassified

Energy-saving drying of corn seeds

Kyrpa¹,

Kulyk²

2019

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In the process of post-harvest processing of corn seeds, the thermal drying of wet cob is the most energy-efficient operation. It depends on the value of the produce-the seeds and its competitiveness on the market. Today, the problem of energy saving becomes more relevant in connection with a significant increase in prices for energy materials, the cost of which is about 90% of all costs for the drying process. Different technical and technological methods of energy saving during drying of corn seeds, such as two-stage drying of cobs with pre-drying in grain, return of exhaust coolant to the drying zone (recirculation), application of the maximum allowable heating temperatures of the cavities (intensive drying) are investigated. The most practical value is the reversing and recycling of coolants, which reduce fuel consumption by 20-26%, fully preserve the quality of the seeds, do not require significant technical re-equipment of chamber corn dryers. The new method of energy saving based on the use of TPG heat generators working from corn cobs burning is determined and investigated. The technical and technological indicators of the operation of chamber corn dryer in the complex with the new heat generator TPG are investigated. The temperature regime corresponded to normative parameters and fluctuated within 38-43 °C. The ventilation regime under which the drying took place depended on the mode of access of air to the fuel and ventilation compartment. Full air access provided a specific airflow at the level of 1393 m 3 /h per 1 tonne of boilers satisfying the norm of 800-1000 m 3 /h. Relative humidity of the working hot air during the entire drying process was 10-12%. In experiments, the drying rate fluctuated within the range from 0.16-0.39%/h, the performance of one chamber-1.2-6.0 t-%/h, depending on the weight of the cobs, their humidity and exposure of drying. Drying on the energy-saving complex did not have a negative impact on the quality of corn seeds. Laboratory similarity of the studied hybrids was 95-98%, which corresponds to normative indexes. The yield of seeds dried in the energy-saving complex was at the control level, and in some cases exceeded it. Control was provided by seeds dried in a laboratory dryer at 39 °C with forced circulation of air and in premises at 20-25 °C. The economic efficiency of the new drying method is determined. The total cost of drying maize cobs with different types of fuel is diesel 1145 UAH/t, gaseous-665 UAH/t, corn cobs-250 UAH/t. In general, the use of new heat generators does not have any negative effect on the technological process of drying-its duration, dynamics and uniformity of drying of the cobs.

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“…(Borém, 2014;Isquierdo et al, 2013;Taveira et al, 2015). Ocorrendo a perturbação celular, essas reações tornam-se irreversíveis, resultando em um produto de menor qualidade ao término do processo (Coradi & Borém, 2009;Coradi et al, 2016).…”

Section: Introductionunclassified

Modelagem matemática da cinética de secagem do café (Coffea arabica L.) processado de diferentes formas com uso de enzimas e levedura

Tosta

Salvio

Corrêa

et al. 2020

RSD

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Among all stages in the coffee production (Coffea arabica L.), post-harvest can significantly impact the final cost and product quality. Among the stages of this phase, drying is one’s that requires most care. The search for new technologies to optimize this process has been growing exponentially, a example is the use of enzymes and yeasts, which can guarantee a safer drying and even improve the quality of the bevarege. The objective of the study was to evaluate the drying behavior of coffee without changing the temperature, air flow, only changing the processing (natural and pulped natural) of the beans using the enzyme Pectinex® Ultra SPL and the yeast CA11 to observe the occurrence of some change in the drying kinetics after processing and modeling the drying kinetics, analyzing which model can more accurately predict the coffee drying. The VALCAM model was the best model to describe drying kinetics, with the highest value of determination coefficient (R2> 99.73%), lowest mean relative deviation value (P <4.43) and standard deviation of the estimate (SE <0.055). For wet processed coffees, the determination coefficients (R2) were varied between the models studied. The VALCAM model was the only one that presented the ideal values to describe the drying phenomenon with determination coefficients (R2) of 99.63%, relative average error (P) of 3.37 and standard deviation of the estimate (SE) of 0.0542.

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Effects of drying air temperature and grain initial moisture content on soybean quality (Glycine Max (L.) Merrill)

Cited by 18 publications

References 15 publications

<b>Validation of an experimental prototype of thick-layer fixed bed dryer and determination of the quality of the dried soybean grains

<b>Validation of an experimental prototype of thick-layer fixed bed dryer and determination of the quality of the dried soybean grains

Energy-saving drying of corn seeds

Modelagem matemática da cinética de secagem do café (Coffea arabica L.) processado de diferentes formas com uso de enzimas e levedura

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