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Oil and Moisture in Olive Paste and Pomace  

Measurement of oil and moisture in olives provides information that enables maximization of yield through: growth of olive varieties that yield high oil levels, harvesting the crop at the optimal time, and optimization of the oil extraction process. Since farmers often receive payment on the basis of moisture and oil content and not simply weight, both the Olive Producers and the Olive Processors profit from being able to make instantaneous on-line or at-line measurements of these constituents.

Olive Oil Extraction Process
More than one process exists. The more traditional methods involve hydraulic presses and the more recent, decanter centrifugation processes. The latter involves grinding the olives and stones into a fine paste which is malaxed (beaten) in order to break up the oil/water emulsion and cause the formation of larger droplets of oil. Water is added to the paste prior to pumping it into a large horizontal centrifuge/decanter where it is spun at high speed. This causes the phases to separate according to their different densities into a solid faction referred to as pomace (an oil, and vegetable water faction). The two liquid factions are then centrifuged again at even higher speeds to separate residual water and oil respectively.

Measurement Location
Several measurement locations are feasible:

1. On the paste as it feeds into the centrifuge/decanter.
2. On the pomace exiting the centrifuge/decanter through a pipe containing a viewing window.
3. On the pomace in the screw conveyor.

Measurement is also feasible at-line using a Benchtop unit which instantaneously measures the moisture and oil content of a sample placed in a Petri dish. Please refer to the application note “Bench Top Olive NIR Tester”

 
 
Measurement Performance
Location Range Pre-decanter Accuracy Pre-decanter Accuracy
Moisture 40-70% 0.9% 1.2%
Oil 15-35% 0.6% 0.3%
 
 
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  Process Sensors Moisture Transmitters

MCT 460: Used in a wide variety of industrial processes, the MCT 460 Multi-Constituent NIR Transmitter, a True Stand-Alone Transmitter, provides off-line accuracy under on-line operating conditions. Read more about the MCT 460 moisture sensors...

MCT 460-T: The MCT 460-T measures moisture... the most critical variable in tobacco processing... providing the world's most accurate, reliable and stable moisture measurement for the tobacco industry. Read more about the MCT 460-T moisture measurement tool...

MCT 460-WP: The MCT 460-WP uses a well proven algorithm which works on a wide range of wood varieties and forms. You choose the mode of operation, stand-alone or networked. Read more about the MCT 460-WP moisture measurement tool...

MCT 330HD: The MCT 330HD features a heavy duty stainless steel enclosure, is resistant to high temperatures, is sealed for wash down environments, and provides reliable, continuous moisture measurement. Read more about the MCT 330HD moisture measurement tool...

MCT 466-SF: The MCT 466-SF features a food grade optical window, a robust stainless steel enclosure, and reliably operates in high temperature locations, measuring moisture, oil & product temperatures. Read more about the MCT 466-SF moisture measurement tool...

MCT 466 QuikCheck: Used for quality control in a wide variety of industrial processes, the MCT 466 QuikCheck bench top NIR Tester provides fast accurate results every time. Read more about the MCT 466 QuikCheck moisture analyzer...

GUARDIAN: The Guardian Scanning Frame System is comprised of three components: MCT-460 NIR Transmitter, the automated Scanning Frame and a PC with Automated Guardian Profile Software. Read more about the GUARDIAN Scanning Frame System...