ISHS Acta Horticulturae 474: III International Symposium on Olive Growing
PRELIMINARY RESULTS OF NIR « ON - LINE» MEASURE OF OIL CONTENT AND HUMIDITY IN OLIVE CAKES FROM THE TWO PHASES DECANTER |
| Authors: | M. Hermoso, M. Uceda, A. Garcia-Ortiz, A. Jimenez, G. Beltrán |
| Keywords: | NIR (Near Infrared Reflectance), olive cake (pomace), on-line measure, two phases decanter |
| DOI: | 10.17660/ActaHortic.1999.474.149 |
| Abstract:
The development of the new two phases system for the extraction of virgin olive oil, has led to the elimination of visual controls necessary for the optimal process monitoring and hence the need of an exhaustive control of the oil loss in the sole by-product, the olive cake. The viability of NIR (Near Infrared Reflectance) "on-line" methods for the measurement of oil content and humidity in olive cake has been studied, this technique does not need reagents and complex sample preparation, and the equipment can be easily installed at the decanter cake passage. The results of preliminary assays developed at the final 96/97 yield, present optimal perspectives for both parameters. A good correlation between NIR-on line and the reference NMR method in laboratory with a correlation coefficient r= 0.959 and an acceptable confidence limits, has been obtained for oil content. For humidity, the correlation between NIR-on line method and the reference method in laboratory, in drying oven, presents a correlation coefficient r=0.5982. The results of analyses in future yields could decide if the "on-line" method is viable for its integration in systems of automatic regulation (control) of the olive oil extraction system. | |
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