Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.)
Osmotic dehydration is a viable process for the partial removal of water in which cellular materials are placed in a concentrated solution of soluble solute. The initial results showed that the values of mass transfer terms (0.2 (g/g) water loss and 0.03 (g/g) solid gain) at the studied range of pro...
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Faculty of Engineering, Universiti Putra Malaysia
2012
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Online Access: | http://psasir.upm.edu.my/id/eprint/31422/1/ID%2031422.pdf http://psasir.upm.edu.my/id/eprint/31422/ http://cafei.upm.edu.my/download.php?filename=/TechnicalPapers/CAFEi2012_52.pdf |
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my.upm.eprints.314222017-02-03T09:16:41Z http://psasir.upm.edu.my/id/eprint/31422/ Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana Osmotic dehydration is a viable process for the partial removal of water in which cellular materials are placed in a concentrated solution of soluble solute. The initial results showed that the values of mass transfer terms (0.2 (g/g) water loss and 0.03 (g/g) solid gain) at the studied range of process variables including temperature of 33 ºC, sucrose concentration of 30% w/w and 180 min of immersion time were not in accordance with an efficient osmotic dehydration process which 40–60% water loss and <10% solid gain are mostly aimed. Thus, feasibility of ultrasonic wave in order to improve the rate of mass transfer was investigated. Ultrasonic treatment was carried out with 20 kHz frequency in the amplitude range of 25-75% for different lengths of sonication time (10-30 min). The highest amounts of water loss (0.42 (g/g)) and solid gain (0.073 (g/g)) were obtained by application of ultrasonic treatment. These increases can be attributed to increased cell wall permeability, facilitating transport of water and solute, as evidenced by the excess conductivity of ultrasonically treated samples as compared with a control condition. The results revealed that ultrasonic technology can be carried out to improve rate of mass transfer during osmotic dehydration. Faculty of Engineering, Universiti Putra Malaysia 2012 Conference or Workshop Item NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/31422/1/ID%2031422.pdf Ganjloo, Ali and Abdul Rahman, Russly and Bakar, Jamilah and Osman, Azizah and Bimakr, Mandana (2012) Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.). In: International Conference on Agricultural and Food Engineering for Life (Cafei2012), 26-28 Nov. 2012, Palm Garden Hotel, Putrajaya. (pp. 162-168). http://cafei.upm.edu.my/download.php?filename=/TechnicalPapers/CAFEi2012_52.pdf |
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Osmotic dehydration is a viable process for the partial removal of water in which cellular materials are placed in a concentrated solution of soluble solute. The initial results showed that the values of mass transfer terms (0.2 (g/g) water loss and 0.03 (g/g) solid gain) at the studied range of process variables including temperature of 33 ºC, sucrose concentration of 30% w/w and 180 min of immersion time were not in accordance with an efficient osmotic dehydration process which 40–60% water loss and <10% solid gain are mostly aimed. Thus, feasibility of ultrasonic wave in order to improve the rate of mass transfer was investigated. Ultrasonic treatment was carried out with 20 kHz frequency in the amplitude range of 25-75% for different lengths of sonication time (10-30 min). The highest amounts of water loss (0.42 (g/g)) and solid gain (0.073 (g/g)) were obtained by application of ultrasonic treatment. These increases can be attributed to increased cell wall permeability, facilitating transport of water and solute, as evidenced by the excess conductivity of ultrasonically treated samples as compared with a control condition. The results revealed that ultrasonic technology can be carried out to improve rate of mass transfer during osmotic dehydration. |
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Conference or Workshop Item |
author |
Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana |
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Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) |
author_facet |
Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana |
author_sort |
Ganjloo, Ali |
title |
Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) |
title_short |
Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) |
title_full |
Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) |
title_fullStr |
Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) |
title_full_unstemmed |
Feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (Psidium guajava L.) |
title_sort |
feasibility of ultrasonic waves to improve mass transfer rate during osmotic dehydration of seedless guava (psidium guajava l.) |
publisher |
Faculty of Engineering, Universiti Putra Malaysia |
publishDate |
2012 |
url |
http://psasir.upm.edu.my/id/eprint/31422/1/ID%2031422.pdf http://psasir.upm.edu.my/id/eprint/31422/ http://cafei.upm.edu.my/download.php?filename=/TechnicalPapers/CAFEi2012_52.pdf |
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