TY - JOUR
T1 - Microwave drying kinetics of tomato pomace
T2 - Effect of osmotic dehydration
AU - Al-Harahsheh, Mohammad
AU - Al-Muhtaseb, Ala'a H.
AU - Magee, T. R.A.
N1 - Funding Information:
The authors would like to thank Al-Hussein Bin Talal University for financial support and professor Steven Bradshaw and engineer Willim Louw from Stellenbosch University/South Africa for their help in measuring the dielectric properties of liquids.
PY - 2009/1
Y1 - 2009/1
N2 - The production of tomato paste produces huge quantities of tomato pomace as a waste product. Such a great amount of pomace waste would become a serious environmental problem and a waste of resources. In this work, a study on the microwave drying of tomato pomace and the effect of osmotic dehydration using sodium chloride was carried out for the purpose of producing dried products, which could be used as fertilizers or animal feed. The effect of microwave power level and the NaCl concentration on the drying rate of tomato pomace was investigated. It was found that microwave drying could be used effectively for drying of such waste product by shortening of the drying process time. The drying rate was found to increase with increasing microwave dosage and NaCl concentration of osmotic solution. Drying rate constant was found to increase dramatically with increasing NaCl concentration up to about 0.1 M, and then starts to decrease steadily as the NaCl concentration further increases. The effective moisture diffusivity varied from 1.14 × 10-6 to 6.09 × 10-6 m2/s, over the output microwave power range studied.
AB - The production of tomato paste produces huge quantities of tomato pomace as a waste product. Such a great amount of pomace waste would become a serious environmental problem and a waste of resources. In this work, a study on the microwave drying of tomato pomace and the effect of osmotic dehydration using sodium chloride was carried out for the purpose of producing dried products, which could be used as fertilizers or animal feed. The effect of microwave power level and the NaCl concentration on the drying rate of tomato pomace was investigated. It was found that microwave drying could be used effectively for drying of such waste product by shortening of the drying process time. The drying rate was found to increase with increasing microwave dosage and NaCl concentration of osmotic solution. Drying rate constant was found to increase dramatically with increasing NaCl concentration up to about 0.1 M, and then starts to decrease steadily as the NaCl concentration further increases. The effective moisture diffusivity varied from 1.14 × 10-6 to 6.09 × 10-6 m2/s, over the output microwave power range studied.
KW - Dielectric properties
KW - Drying constant
KW - Microwave drying
KW - Osmotic dehydration
KW - Tomato pomace
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U2 - 10.1016/j.cep.2008.06.010
DO - 10.1016/j.cep.2008.06.010
M3 - Article
AN - SCOPUS:68949186249
SN - 0255-2701
VL - 48
SP - 524
EP - 531
JO - Chemical Engineering and Processing: Process Intensification
JF - Chemical Engineering and Processing: Process Intensification
IS - 1
ER -