Status : Verified
| Personal Name | Rocha, Reina Danielle P. |
|---|---|
| Resource Title | Optimization of drying parameters of eggshell calcium powder preparation |
| Date Issued | 13 June 2016 |
| Abstract | A survey of studies on eggshell calcium powder production revealed that there is a wide variation in terms of methodology, specifically with respect to drying conditions such as time (60-1000°C) and temperature (10 to 120 min.). The aim in this study was to establish and optimize drying process factors (temperature and time) of eggshell calcium powder production using a two factorial response surface methodology design. Optimization criteria include the minimization of water activity (0.30 - 0.85) and maximization of calcium content (~ 40%). Two quadratic models, which predicted the effects of drying temperature (T, 60 - 150 °C) and time (t, 10 - 120 min.) on water activity and calcium content, were generated: aw = 1.044 - 2.36 x 10 exp -3 T - 1.285 x 10 exp -3 t - 1.235 x 10 exp -5 (Txt) %Ca= 31.68 + 3.8 x 10 exp -2 T + 5.89 x 10 exp -2 t - 3.25 x 10 exp -4 ( T x t ) Drying at 137 °C for 10 min. was predicted to meet optimization criteria and was selected as the optimal solution. Verification experiments, using optimal (137 °C, 10 min.) and non - optimal (60 °C, 10 min.) drying conditions, were used to validate the accuracy of the predictive models. The water activity of "optimal" (aw 0.518 ± 0.03) and "non" - optimal powders (aw 0.868 ± 0.01) were generally shown to be lower than their predicted responses (0.690 ± 0.03 and 0.882 ± 0.03 respectively). While their calcium contents (37.57 ± 1.17 % and 36.52 ± 1.26 %) were shown to be higher than predicted (37.025 ± 1.01 and 34.35 ± 1.01). In general, actual values were found to be better than their predicted values. Verification experiments confirmed that the generated models predicted responses within tolerance intervals and can produce fail safe results. |
| Degree Course | Bachelor of Science in Food Technology |
| Language | English |
| Keyword | Eggshells--Drying--Philippines |
| Material Type | Thesis/Dissertation |
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Category : F - Regular work, i.e., it has no patentable invention or creation, the author does not wish for personal publication, there is no confidential information.
Access Permission : Open Access