Cold brew coffee in 3 minutes using acoustic cavitation
1–10 of 361 posts
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#2Quick, someone let James Hoffman know!
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#3Coffee fracking IRL
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#4Quick, someone let James Hoffman know!
I was just about to suggest he same thing
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#5Was going to crack some joke about their work, but then realized that this tech is absolutely monetizible. Hook it up to, say, Nespresso marketing machine and this will sell like hotcakes.
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#6This is awesome in an overengineered way, but if you want to make cold brew the normal way it's very easy. Basically you make it using a cafetière/French press/Bodum[1] using cold tap water in the fridge overnight (probably put some cling film over it), then press it and run it through a drip filter. The secret (if there is one) is to use fine ground coffee like you would use for an espresso rather than coarse ground (like you would use for a normal drip coffee or French press). It's very easy and very lovely. Just don't skimp on coffee.
More detailed recipe here https://www.uncarved.com/articles/cold-brew/
[1] UK/US/French name but you know the thing with the plunger
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#7Interesting, I wonder how that would compare to recirculating water through the coffee grounds through a filter.
It does say the ultrasound generates 'micro-jets with enough force to pit and fracture the coffee grounds', so I assume that the ultrasound would work better?
There also seems research in using ultrasound in artificial ageing of whisky/spirits.
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#8It's really just a matter of mindset -- Many things go faster if you chuck them into a microwave or a sonicator :) I'm definitely going to try this out with cold brew in a cheapie bath sonicator. The thing here is like a big ass probe sonicator butted up against an espresso portafilter which is probably a bit louder than a loud steamer
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#9This is incredibly cool and I want to go build one, though it feels like that cutaway model of injecting the ultrasound from the side would lead to very uneven extraction.
I also chuckled at graf about doubling the caffeine content, as if that's necessarily a good thing =).
Those cheap HC-SR04 ultrasonic modules output at 40kHz, so maybe this is home-brewable.
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#10Two of my favorite things, cold brew and acoustics :D