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High-pressure shift freezing: a potential tool to improve cryoconcentration processes.

Number: pap. ID: 130

Author(s) : OTERO L., SANZ P., GUIGNON B., et al.

Summary

High-Pressure Shift Freezing (HPSF) is an innovative freezing process with interesting advantages over conventional methods. Some of these advantages could be exploited to improve industrial applications in which ice crystallization is a critical step. In this work, high-pressure shift freezing is assessed as a substitute of the crystallization step in conventional cryoconcentration systems. HPSF experiments were performed at different pressure (200-700 MPa) and temperature (-5 ºC and -20 ºC) conditions in orange juices of several concentrations (11.8-40 ºBrix). After crystallization, the final concentration reached in the juices and the size and shape of the ice crystals formed were measured. The obtained results showed that the higher the pressure and the lower the temperature employed in the HPSF process, the higher is the final concentration in the juice obtained. Pressure and temperature, altogether with the initial concentration of the sample, also determined the size and shape of the ice crystals formed.

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Details

  • Original title: High-pressure shift freezing: a potential tool to improve cryoconcentration processes.
  • Record ID : 30001573
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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