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Open AccessArticle

Recovery of Aromatics from Orange Juice Evaporator Condensate Streams by Reverse Osmosis

1
Institute on Membrane Technology, ITM-CNR, c/o University of Calabria, via Pietro Bucci, 17/C-87036 Rende (CS), Italy
2
Department of Chemistry and Chemical Technologies, c/o University of Calabria, via Pietro Bucci, 12/C-87036 Rende (CS), Italy
*
Author to whom correspondence should be addressed.
Current address: CNR-Institute of Atmospheric Pollution Research, Division of Rende, c/o University of Calabria-Polifunzionale, I-87036, Rende (CS), Italy.
Membranes 2020, 10(5), 92; https://doi.org/10.3390/membranes10050092
Received: 11 April 2020 / Revised: 4 May 2020 / Accepted: 7 May 2020 / Published: 8 May 2020
(This article belongs to the Special Issue Advances in Reverse Osmosis Membranes and Processes)
The aim of this work was to analyze the potential of reverse osmosis (RO) membranes in the recovery and concentration of aroma compounds from orange juice evaporator condensate (EC) streams. Concentration experiments were performed by using three RO spiral-wound aromatic polyamide membranes (SG1812C-34D, SC1812C-34D and SE1812) with different NaCl rejections. The effect of transmembrane pressure, axial feed flowrate and volume concentration ratio (VCR) on permeate flux was studied. Rejections of the investigated membranes towards specific aroma compounds (octanol, α-terpineol, terpinen-4-ol, cis-carveol, karvon, linalool) in selected operating conditions were also evaluated. The concentrations of the aroma compounds were determined by gas chromatography coupled with mass spectrometry (GC-MS) using headspace solid-phase microextraction (HS-SPME) as a sample preparation approach. For all selected membranes, the permeate flux increased linearly by increasing the operating pressure from 5 to 25 bar; on the other hand, the feed flowrate did not have any significant effect on the permeate flux. High retention values towards aroma compounds (>80%) were measured for all selected membranes. However, the SC membrane showed the highest rejection values (>96%) and the best correlation between concentration factor of aroma compounds and VCR. View Full-Text
Keywords: evaporator condensates; citrus processing; aroma compounds; reverse osmosis (RO) evaporator condensates; citrus processing; aroma compounds; reverse osmosis (RO)
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MDPI and ACS Style

Destani, F.; Naccarato, A.; Tagarelli, A.; Cassano, A. Recovery of Aromatics from Orange Juice Evaporator Condensate Streams by Reverse Osmosis. Membranes 2020, 10, 92.

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