TapTechNews reports on May 11, that engineers from the University of New South Wales, Sydney campus, have developed a new method that significantly reduces the production time of cold brew coffee to less than 3 minutes without compromising its taste.
TapTechNews notes: Cold Brew Coffee, a recent popular coffee brewing method, traditionally involves steeping coffee grounds in cold water for over 12 hours to extract its flavors at a low temperature.
Scientist Francisco Trujillo tested this new technique using a Breville Dual Boiler BES920 espresso machine. He attached a clamp-on transducer, equipped with a metal horn, to the brewing basket.
Trujillo then activated the transducer, injecting 38.8 kHz of sonic waves into the walls of the filter basket, turning it into a powerful ultrasonic reactor.
The ultrasonically brewed cold brew concentrated coffee differs in color compared to traditional cold brew due to the emulsification of the coffee's oils. However, this method vastly improves the extraction of oils, flavors, and aroma from the coffee grounds, doubling the extraction rate and caffeine concentration compared to non-ultrasonic samples.
TapTechNews attached references:
How you can make cold-brew coffee in under 3 minutes using ultrasound
Coffee brewing sonoreactor for reducing the time of cold brew from several hours to minutes while maintaining sensory attributes