Membrane-based removal of undesirable odorants from commercial coconut water

Overview

This solution addresses a persistent quality challenge in the commercial coconut water industry: the presence of undesirable odorants that negatively affect consumer acceptance. The approach uses a hydrophobic, porous membrane to selectively strip volatile aroma compounds from coconut water without removing the valuable sugars and salts that define the product's nutritional profile and taste. By exploiting the natural volatility and hydrophobic character of odor-causing molecules relative to the aqueous continuous phase, the technology enables producers to improve flavor quality while preserving product composition.

Technical specifications

• Selective membrane separation: A hydrophobic porous polymer film allows volatile odor compounds to pass through while rejecting water, sugars, and salts.
• Driving force: A humidified gas stream creates a concentration gradient across the membrane that pulls volatiles out of the coconut water.
• Key design variables: Membrane composition, membrane surface area, gas flow rate, coconut water flow rate, and operating temperature.
• Analytical validation: Removal of targeted volatiles and retention of sugars and salts will be quantified using gas chromatography-olfactometry (GC-Olfaction) and gas chromatography time-of-flight mass spectrometry (GC-TOF MS).
• Sensory profiling: Trained sensory evaluation will compare incoming coconut water against treated samples to confirm improvements in aroma and flavor.
• Prior validation: The underlying principle has been demonstrated in a related application involving volatile organic compound removal from aqueous-based paint systems.

Technology readiness level

The technology is at an early-to-mid stage of development. The core scientific principle of membrane-assisted volatile removal has been validated in a separate aqueous system, providing a credible proof of concept. The current research program is focused on adapting and optimizing the approach specifically for coconut water, including membrane selection, process parameter optimization, and comprehensive analytical and sensory validation. Successful completion of this work would establish readiness for pilot-scale evaluation and potential industry collaboration toward commercial implementation.