A groundbreaking method for brewing espresso has emerged, led by Colombian researcher Francisco Trujillo at the University of New South Wales in Australia. This innovative process, termed “ultrasonic espresso,” uses high-frequency sound waves instead of heat to extract flavors from coffee. The technique is not only energy-efficient but also promises to maintain the rich taste of traditional espresso.
• The ultrasonic method takes about three minutes to brew, significantly longer than the conventional 30 seconds but uses 75% less energy.
• It employs acoustic cavitation, creating tiny bubbles that help extract soluble compounds from coffee grounds.
• Sensory tests showed no significant preference between ultrasonic and traditional espresso, with similar flavor and aroma profiles.
• The new brewing technique uses only 24% of the energy required by standard espresso machines.
This innovation matters because it could lead to more sustainable coffee production, reducing energy consumption in coffee shops and industries. If successful, it may change how coffee is brewed globally, paving the way for new machines that utilize this technology.
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