Dehydration of the red chilli (Capsicum annuum L., costefio) using an indirect-type forced convection solar dryer
Por:
Castillo-Tellez, Margarita, Pilatowsky-Figueroa, Isaac, Cesar Lopez-Vidana, Erick, Sarracino-Martinez, Omar, Hernandez-Galvez, Geovanni
Publicada:
5 mar 2017
Resumen:
Chilli is a vegetable that is produced and consumed in various parts of
the world, not only for its, culinary qualities but also for its
nutritional content and potential industrialization. Mexico has the
highest genetic diversity of chilli, with more than 40 varieties. A
dried chilli has different properties of flavour, colour and pungency
and a high added value; however, information about its dehydration is
scarce.
In this work, the dehydration of a red chilli, the ``costefio''
(Capsicum annuum L), which is highly appreciated for its organoleptic
properties and used in the food industry, was carried out. The
experimental study was performed at the Instituto of Energias Renovables
(IER) of the Universidad Nacional Autonoma de Mexico (UNAM) in Temixco,
Morelos, Mexico, located at 18 degrees 51'NL and 99 degrees 14'WL. The
drying process was carried out at controlled temperatures of 45 degrees
C, 55 degrees C and 65 degrees C, using a laboratory oven and an
indirect tunnel-type solar dryer. The drying kinetics between 55 degrees
C and 65 degrees C are similar, with drying times of 2.75 h and 3.0 h,
respectively, while at 45 degrees C, the drying time was 6.25 h. Wang
and Sing's model gave a better fit for the drying kinetics at 45 degrees
C, and the Page model was better for 55 degrees C and 65 degrees C.
In the solar drying processes, two ranges of air velocity were
established; high velocity was between 1.4 and 2.6 m/s, and low velocity
was between 0.7 and 1.48 m/s. In both cases, a temperature between 31
degrees C and 45 degrees C was obtained. For the first range, the total
drying time was 16 h, reaching a final moisture content between 0.057 kg
of water/kg dry matter and 0.90 kg water/kg dry matter. For the second
range, the time was 21 h, with a moisture content of 0.0611 kg of
water/kg dry matter and 0.109 kg of water/kg dry matter. (C) 2016
Elsevier Ltd. All rights reserved.
Filiaciones:
Castillo-Tellez, Margarita:
Univ Autonoma Campeche, Fac Ingn, Campus V,Predio S-N Av Humberto Lanz Cardenas, San Francisco De Campech 24085, Campeche, Mexico
Unidad Habitac Ecol Ambiental, Campus V,Predio S-N Av Humberto Lanz Cardenas, San Francisco De Campech 24085, Campeche, Mexico
Pilatowsky-Figueroa, Isaac:
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Cerrada Xochicalco S-N, Temixco 62580, Morelos, Mexico
Cesar Lopez-Vidana, Erick:
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Cerrada Xochicalco S-N, Temixco 62580, Morelos, Mexico
Sarracino-Martinez, Omar:
Univ Popular Chontalpa, Carretera Cardenas Huimanguillo Km 2, H Cardenas 86500, Tabasco, Mexico
Hernandez-Galvez, Geovanni:
Univ Popular Chontalpa, Carretera Cardenas Huimanguillo Km 2, H Cardenas 86500, Tabasco, Mexico
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