Abstract
ABSTRACTSliced cull mushrooms were extracted at 60°C, 75°C and 90°C using water, 10‐3M sodium metabisulfite or 10‐3M ascorbic acid solutions in a pilot scale counter‐current slope diffuser. Extracts were centrifuged, ultrafiltered (UF) by a commercial great resistance, GR‐51PP, 50,000 molecular weight cut‐off membrane module, and then concentrated to 18‐20% soluble solids (SS) by reverse osmosis (RO) using a high resistance, HR‐95 membrane module. Primary mushroom volatiles including l‐octen‐3‐ol and 3‐octanone were evaluated in raw, extracted, and concentrated juices. The best temperature/solvent extraction system was 75°C in water with 98.2% soluble solids recovery. RO conducted at 10‐20°C following the UF process gave an eight‐ to nine‐fold concentration (from 1.8% SS. to 17.5% SS) with 85.1% solute recovery.
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