Thermal Dealcoholization

Thermal Dealcoholization encompasses industrial processes—primarily Vacuum Distillation and Steam Stripping—used to remove ethanol from fermented beverages by exploiting the different boiling points of water and alcohol.

Process Mechanics

To prevent the complete degradation of “real beer” flavors, thermal systems operate under a vacuum. This significantly lowers the boiling point of alcohol (e.g., to ~38°C / 100°F instead of 82°C / 180°F), allowing the ethanol to evaporate with less thermal stress on the liquid.

• Vacuum Distillation: Systems like those from bevzero utilize a single-pass, low-temperature vacuum distillation to gently remove alcohol.
• Steam Stripping: Systems from alfa-laval use soft process water vapors as a stripping gas, passing aromas through a condenser in short cycles to capture and return them to the liquid.
• SIGMATEC Systems: Provided by api-heat-transfer, these systems process liquid at 40-80°C and are highly effective at concentrating the extracted alcohol for resale.

Strategic Trade-offs

Thermal dealcoholization is highly effective for reaching strict 0.00% ABV targets, making it the required technology for brands operating in strict regulatory environments or Islamic markets. However, it inherently risks thermal flavor degradation compared to membrane-filtration-ro. While vendors claim aroma recovery systems make flavor loss minimal, achieving true taste-parity remains a challenge.

Financially, thermal systems have high capital and operating expenditures (OPEX runs roughly €2.8 to €3.8 EUR/hL). However, these costs can be partially offset through byproduct-valorization, as thermal systems can extract and concentrate the byproduct alcohol up to 85% ABV for secondary sale.