Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying
ABSTRACT Grain drying is a common process, due to its need for the maintenance of quality, but it is the activity with the highest energy demand among the postharvest stages. Thus, this study aimed to evaluate the effect of different tempering times on the energy efficiency of drying process and mai...
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Universidade Federal de Campina Grande
2021-08-01
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| author | Geraldo A. Mabasso Valdiney C. Siqueira Wellytton D. Quequeto Rodrigo A. Jordan Elton A. S. Martins Vanderleia Schoeninger |
| author_facet | Geraldo A. Mabasso Valdiney C. Siqueira Wellytton D. Quequeto Rodrigo A. Jordan Elton A. S. Martins Vanderleia Schoeninger |
| author_sort | Geraldo A. Mabasso |
| collection | DOAJ |
| description | ABSTRACT Grain drying is a common process, due to its need for the maintenance of quality, but it is the activity with the highest energy demand among the postharvest stages. Thus, this study aimed to evaluate the effect of different tempering times on the energy efficiency of drying process and maintenance of cell membrane integrity of maize grains harvested with moisture content at 0.34 ± 0.01 d.b. The grains were dried in an experimental fixed-bed dryer with control of temperature and air flow conditions. The experiment was conducted in a completely randomized design with five tempering times (0, 4, 8, 12 and 16 hours) and four repetitions, where zero corresponds to continuous drying, while the remaining times correspond to the intermittent dryings. The grains were dried at the temperature of 100 ºC and air flow of 15.4 m3 min-1 t-1 until reaching moisture content of 0.16 ± 0.03 d.b. For intermittent drying, the process was interrupted with 0.22 ± 0.02 d.b. and restarted after the tempering time. The increase of tempering time led to reductions in effective drying time, specific energy consumption, electrical conductivity and damage and increase in the drying rate and overall energy efficiency. Intermittent drying reduced the drying time, being 30.25% more efficient than continuous drying. |
| format | Article |
| id | doaj-art-c62cb56406a64af8a019cf2928e54a4c |
| institution | Kabale University |
| issn | 1807-1929 |
| language | English |
| publishDate | 2021-08-01 |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-c62cb56406a64af8a019cf2928e54a4c2025-08-20T03:24:47ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-19292021-08-01251071071610.1590/1807-1929/agriambi.v25n10p710-716Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent dryingGeraldo A. Mabassohttps://orcid.org/0000-0002-7725-8195Valdiney C. Siqueirahttps://orcid.org/0000-0003-3698-0330Wellytton D. Quequetohttps://orcid.org/0000-0002-0658-2692Rodrigo A. Jordanhttps://orcid.org/0000-0002-2479-4461Elton A. S. Martinshttps://orcid.org/0000-0002-3195-2317Vanderleia Schoeningerhttps://orcid.org/0000-0001-7308-4709ABSTRACT Grain drying is a common process, due to its need for the maintenance of quality, but it is the activity with the highest energy demand among the postharvest stages. Thus, this study aimed to evaluate the effect of different tempering times on the energy efficiency of drying process and maintenance of cell membrane integrity of maize grains harvested with moisture content at 0.34 ± 0.01 d.b. The grains were dried in an experimental fixed-bed dryer with control of temperature and air flow conditions. The experiment was conducted in a completely randomized design with five tempering times (0, 4, 8, 12 and 16 hours) and four repetitions, where zero corresponds to continuous drying, while the remaining times correspond to the intermittent dryings. The grains were dried at the temperature of 100 ºC and air flow of 15.4 m3 min-1 t-1 until reaching moisture content of 0.16 ± 0.03 d.b. For intermittent drying, the process was interrupted with 0.22 ± 0.02 d.b. and restarted after the tempering time. The increase of tempering time led to reductions in effective drying time, specific energy consumption, electrical conductivity and damage and increase in the drying rate and overall energy efficiency. Intermittent drying reduced the drying time, being 30.25% more efficient than continuous drying.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000710&tlng=enZea mays L.drying ratetempering timeelectrical conductivityiodine reaction |
| spellingShingle | Geraldo A. Mabasso Valdiney C. Siqueira Wellytton D. Quequeto Rodrigo A. Jordan Elton A. S. Martins Vanderleia Schoeninger Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying Revista Brasileira de Engenharia Agrícola e Ambiental Zea mays L. drying rate tempering time electrical conductivity iodine reaction |
| title | Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying |
| title_full | Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying |
| title_fullStr | Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying |
| title_full_unstemmed | Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying |
| title_short | Energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying |
| title_sort | energy efficiency and physical integrity of maize grains subjected to continuous and intermittent drying |
| topic | Zea mays L. drying rate tempering time electrical conductivity iodine reaction |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000710&tlng=en |
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