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Pilot-scale production of cloudy juice from low-quality pear fruit under low-oxygen conditions

Tijdschriftbijdrage - Tijdschriftartikel

In this study, a process for the production of premium quality yellowish, cloudy pear juice from low-quality fruit under low-oxygen conditions was developed. The production process consisted of (1) shredding, (2) pressing with spiral-filter technology including a vacuumised extraction cell, (3) holding in an inert gas buffer tank, (4) pasteurisation, (5) and refrigerated storage. First, the system parameters of a spiral-filter press were optimised with the aim of producing a yellowish, cloudy pear juice with the highest possible juice yield. A maximum juice yield of 78% could be obtained. Enzymatic browning during juice extraction could be suppressed as a result of the fast processing and the low air (oxygen) levels in the extraction chamber of the spiral-filter press. Furthermore, we observed that instantaneous pasteurisation at 107 degrees C for 6 s, subsequent aluminium laminate packaging and cold storage had only a minimum effect on the phenolic composition. (C) 2014 Elsevier Ltd. All rights reserved.
Tijdschrift: Food Chemistry
ISSN: 0308-8146
Volume: 173
Pagina's: 827 - 837
Aantal pagina's: 11
Jaar van publicatie:2015
Trefwoorden:Pear juice, Phenolic compounds, Pilot-scale, Spiral-filter press