Vacuum flash evaporation for removing off-flavor vocs from coconut water
Pilot-scale vacuum flash evaporation process designed to remove odor-important volatile organic compounds from from-concentrate coconut water. Using mild-to-mmoderate temperatures and water-assisted volatiles evaporation, the technology targets reduction of off-flavors below sensory thresholds without altering the product's nonvolatile profile.
Overview
This technology applies vacuum flash evaporation to from-concentrate coconut water (FC CCW) to selectively remove odor-important volatile organic compounds (VOCs) responsible for undesirable off-flavors. By atomizing diluted coconut water into a vacuum environment at mild to moderate temperatures, the process enables water-assisted volatiles evaporation, stripping high and intermediate volatility compounds while preserving the nonvolatile organic and inorganic components that define product identity. The result is a cleaner-tasting coconut water with off-flavors reduced below their odor detection thresholds.
The approach addresses a key challenge in coconut water processing, where concentration and storage can generate off-note aromas that limit consumer acceptance. By targeting only the volatile fraction responsible for off-flavors, the process offers a non-destructive alternative to aggressive thermal or chemical treatments.
Technical specifications
- Feedstock: Diluted FC CCW at 5–10 Brix, enabling efficient atomization and volatiles stripping
- Process environment: Vacuum conditions at mild to moderate temperatures to support solvent-assisted volatiles evaporation
- Scale: Pilot-scale equipment available through the University of Illinois Integrated Bioprocessing Research Laboratory (IBRL), including vacuum-capable reaction and extraction vessels up to 750 L
- Analytical validation: Stable isotope dilution analysis (SIDA) combined with gas chromatography-mass spectrometry (GC-MS) and GC-olfactometry (GCO) to confirm reduction of target off-flavor compounds below odor detection thresholds and to verify no new odor-significant VOCs are formed
- Custom equipment capability: Experience building pilot-scale flash evaporation systems, jet cookers, and process tanks with precise electronic controls
Technology readiness level
This technology is at the proof-of-concept/feasibility stage. No studies have been conducted to date, but pilot-scale validation is planned using existing equipment at the IBRL facility. The near-term validation plan involves treating diluted FC CCW feedstocks and analyzing both treated products and untreated controls using SIDA, GC-MS, and GCO to demonstrate effective removal of target VOCs below sensory thresholds. The pilot-scale infrastructure and analytical capabilities are already in place, positioning the technology for progression toward commercial-readiness assessment.
About University of Illinois, Urbana-Champaign
The University of Illinois Urbana‑Champaign is a flagship public research university with large‑scale research capacity and a broad academic portfolio. An on‑campus Research Park co‑locates corporate R&D teams and startups with faculty, while the National Center for Supercomputing Applications provides advanced computing and data capabilities for collaboration. Integration with a regional health system and an engineering‑based college of medicine enables clinical translation, and a long‑standing extension network links campus innovation to partners statewide. Research is supported by competitive federal funding from NSF, NIH, DOE, USDA, and DoD. A technology transfer office streamlines IP, licensing, and startups, complemented by incubators and prototyping in the Research Park.
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