Drying kinetics of barley grains and effects on the germination index

Abstract

This study aimed to assess the drying kinetics of barley grains and, using mathematical modeling, to evaluate the diffusivity during drying and after drying to evaluate the effect of high drying temperatures on the seed germination index for malt production. Three drying temperatures 40, 60 and 80°C were used. The last two, 60 and 80°C, reached moisture close to ideal for storage with 6 and 4 hours respectively; at 40°C, drying process took 12 hours and would still take additional hours to reach 13% moisture on a dry basis. Drying temperature influenced the germination power. The protein content was reduced according to increased drying time. The diffusivity coefficient was higher in conventional than in intermittent drying, probably due to heat loss in the intermittent process. It was observed that higher the temperature higher is the diffusivity. Ks values of the Omoto model ranged from 1.07 to 2.05E-4.Keywords: malt; diffusivity; thermal properties.Practical Application: This paper presents contributions on drying system as barley kernels continues intermittent evaluating drying temperature with germination index which is very important for the planting system and malting.

Drying kinetics and effective diffusion of buckwheat grains

“…As the drying air temperature increased, the diffusion coefficient also increased. According to Soares, Jorge and Montanuci (2016), lower drying air temperatures promote greater internal resistance to water transport during drying, resulting in lower values of the effective diffusion coefficient. This is contrary to what happens at higher temperatures when the water diffusion from the center to the periphery is higher.…”

Інноваційні Сонячні Сушарки На Основі Сонячних Теплових Повітряних Колекторів

“…В даний час для таких типів сонячних сушарок нами розробляються спеціальні пристрої для контролю та регулювання температури і вологості сушіння продуктів харчування, що дуже важливо при сушінні лікарських трав, зернових культур, фруктів, грибів і т.д. [14][15] Адже відхилення на кілька градусів при сушінні таких продуктів може суттєво змінити їхні поживні характеристики.…”

Intensification of the drying process of small seed oilseeds using microwave electromagnetic radiation

“…In agricultural practice, small seed oil crops such as rapeseed, mustard, and saffron milk, which are in great demand for agriculture and industry, are becoming increasingly important (Håkansson et al, 2013;Kovalyshyn, 2015;Kovalyshyn et al, 2015). One of the most important operations of oilseed cultivation technology is post-harvest seed treatment (Håkansson et al, 2013;Soares et al, 2016;Moreno et al, 2017). After ripening, rapeseed has a moisture content that amount from 14 to 27 %, and the recommended humidity for storage should be no more than 7 to 8 %.…”

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