| Biotechnology |
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| Finite element analysis and modeling of water absorption by date pits during a soaking process |
| Motahareh Waezi-Zadeh, Ahmad Ghazanfari, Shahin Noorbakhsh |
| Horticultural Research Institute, Shahid Bahonar University of Kerman, P.O. Box 76169-133, Kerman, Iran |
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Abstract Date pits for feed preparation or oil extraction are soaked in water to soften before milling or extrusion. Knowledge of water absorption by the date pits helps in better managing the soaking duration. In this research, the process of water absorption by date pits was modeled and analyzed using Fick’s second law of diffusion, finite element approach, and Peleg model. The moisture content of the pits reached to its saturation level of 41.5% (wet basis) after 10 d. The estimated coefficient of diffusion was 9.89×10−12 m2/s. The finite element model with a proposed ellipsoid geometry for a single date pit and the analytical model fitted better to the experimental data with R2 of 0.98. The former model slightly overestimated the moisture content of the pits during the initial stages of the soaking and the latter model generally underestimated this variable through the entire stages of soaking process.
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Received: 24 October 2009
Published: 04 July 2010
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