Researchers at the University of New South Wales (UNSW) Sydney have developed a method for brewing espresso-strength coffee using ultrasonic sound waves instead of boiling water.
If you are to brew espresso traditionally using a coffee machine, ground coffee beans and boiling water are crucial to the process. In about 30 seconds the machine will deliver you a shot of espresso for that caffeine kick.
The UNSW Sydney researchers have developed a completely new brewing process that uses room-temperature water instead of boiling water, but crucially still delivers the same rich flavour.
“As someone from Colombia, I like to think coffee is in my blood – and I’m proud to come from a country known for producing some of the best coffee beans in the world. So perhaps that’s why I have spent a lot of time in my laboratory with my team asking a simple question: does espresso really need hot water?” said Francisco Trujillo, senior lecturer at the school of chemical engineering, UNSW Sydney.
Their ultrasonic...