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|Title:||Osmotic dehydration of tilapia fillets in limited volume of ternary solutions|
Sobral, P.J.do A.
|Abstract:||In this study, water activity, moisture content reduction and solute uptake kinetics as well as mass transfer in osmotic dehydration of tilapia (Oreochromis niloticus) fillets were studied, using limited volumes (solution/fillet ratio: 4/1) of ternary solutions (salt–sugar–water) at different initial sucrose (0–100 g in 100 g of water) and salt (0–35.14 g in 100 g of water) concentrations at 20 °C. The multicomponent effective diffusion coefficients were calculated by fitting the experimental values to analytical solution of mass transfer equations with a limited solution/fillet ratio. Previously, the effective diffusion coefficients of salt and sugar in tilapia muscle were calculated using a binary system. A very good fit between the mathematical model and experimental values was observed. The binary coefficients obtained were: for sodium chloride, D11, 0.91×10−9 m2 s−1 and sucrose, D22, 0.22×10−9 m2 s−1, and the calculated cross-term coefficients, D12 and D21, were −0.12×10−9 and 0.06×10−9 m2 s−1, respectively|
|Appears in Collections:||FEA - Artigos e Outros Documentos|
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