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Ohmic heating-assisted vacuum distillation (ODVD) offers a faster and more energy-efficient method for producing non-alcoholic beer compared to vacuum rotary distillation (VDD). Both methods impact aroma compounds, but ODVD presents a promising alternative for quality non-alcoholic beverage production.

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Area of Science:

  • Food Science and Technology
  • Chemical Engineering
  • Beverage Production

Background:

  • Non-alcoholic beer production requires efficient dealcoholization methods.
  • Traditional methods like vacuum rotary distillation (VDD) can be time-consuming and energy-intensive.
  • Exploring novel technologies like ohmic heating-assisted vacuum distillation (ODVD) is crucial for optimizing production.

Purpose of the Study:

  • To compare the efficacy of ODVD and VDD for non-alcoholic beer production.
  • To evaluate the impact of both systems on key quality parameters.
  • To determine the energy efficiency and processing time of each method.

Main Methods:

  • Non-alcoholic beer was produced using ODVD and VDD systems.
  • Processes were conducted under varying vacuum pressures (100-200 mbar).
  • ODVD utilized in-situ ohmic heating (15-25 V/cm), while VDD used external heating (50-67°C).

Main Results:

  • ODVD demonstrated significantly shorter processing times and higher energy efficiency than VDD.
  • Both methods led to a slight increase in pH and loss of specific aroma compounds.
  • VDD samples exhibited higher color and bitterness values compared to ODVD and original beer.

Conclusions:

  • ODVD is a viable and energy-efficient alternative for non-alcoholic beer production.
  • ODVD offers comparable product quality to VDD with improved process metrics.
  • Further research into ODVD can optimize non-alcoholic beverage manufacturing.