Cold brew coffee has always been a patience trade. UNSW Sydney’s latest process could compress that wait from 12 to 24 hours to about three minutes, while cutting energy use by up to 75 per cent.
For FMCG operators, that matters because it changes the economics of coffee concentrate, ready-to-drink beverages and bottled coffee. I see the biggest shift not in café culture, but in how manufacturers make and move coffee at scale.
What Is Ultrasound-Based Cold Brew and Why It Matters for FMCG
Cold brew has grown because shoppers like its smoother flavour and lower bitterness, but the process has been slow, space-heavy and energy-intensive. That has limited how easily manufacturers can turn it into a high-volume industrial product.
The UNSW team has tested an ultrasound-based method that extracts flavour compounds, oils and caffeine from coffee grounds without heating the water. In FMCG terms, that is important because it tackles a basic constraint in beverages: time in tank, energy on site and output per production run.
The idea is simple enough to understand, even if the science is not. Instead of waiting for flavour to steep, the process uses sound waves to speed extraction and produce espresso-strength coffee in room-temperature water.
UNSW Sydney’s ultrasonic espresso process and the measured results
Led by Dr Francisco Trujillo from UNSW’s School of Chemical Engineering, the team developed what it calls an “ultrasonic espresso”. The findings were published in the Journal of Food Engineering.
The researchers said the process relies on acoustic cavitation, where microscopic bubbles form and collapse in liquid. That action improves the transfer of flavour compounds and caffeine from the coffee grounds, which is why the brewing time drops to around two-and-a-half to three minutes.
They also ran blind taste tests with about 100 regular coffee drinkers. Participants compared conventional espresso, ultrasound-brewed espresso, and filter coffee made both ways.
| Method | Typical process time | Energy use | Taste result |
|---|---|---|---|
| Conventional cold brew | 12–24 hours | Higher | Established market benchmark |
| Ultrasound-based coffee process | About 3 minutes | Up to 75% lower | No significant difference versus conventional espresso in the measured categories |
| Ultrasound filter coffee | Minutes | Lower than conventional method | Preferred overall by participants |
The most important commercial point is not just speed. It is that the ultrasound method did not damage taste in the trial, and in some cases the panel preferred the ultrasound-brewed samples.
That is the kind of result coffee manufacturers pay attention to. If a process can preserve quality while lowering time and power costs, it starts to look less like a lab exercise and more like a production option.
How the process could reshape RTD coffee and concentrate production
I think the clearest use case is not café espresso, but industrial coffee concentrate. The researchers said manufacturers could use the process to produce espresso-strength concentrate for RTD products, then transport it and dilute it later into cold brew or milk-based coffee beverages.
That matters because logistics and formulation often determine margin in beverage categories. A more concentrated base can reduce freight inefficiency, support centralised production and simplify downstream blending for co-packers and brands.
In practical terms, this could help suppliers who want faster changeovers and smaller working inventories. It may also create room for more seasonal or limited-run coffee drinks without tying up production for a full day.
What this ultrasound coffee method does not change yet
This is still a research result, not a commercial rollout. The researchers said they are confident the system can be scaled up, but they did not disclose a live industrial deployment, costed equipment package or manufacturing partner.
It also does not remove the commercial realities of coffee sourcing, packaging and retail execution. Shelf life, flavour stability and buyer acceptance will still decide whether the process lands in supermarkets, convenience or foodservice.
For beverage manufacturers, the early beneficiaries are likely to be those already making cold brew, RTD coffee and concentrates at scale. Suppliers chasing efficiency will see the strongest near-term case, while retailers could gain from faster innovation cycles if the technology proves stable in commercial plants.
Why coffee processing technology is now an FMCG margin story
What stands out here is how quickly food science is moving from product novelty to operating advantage. In a category like coffee, the biggest gains often come not from changing the drink, but from changing the process behind it.
That is why the ultrasound-based coffee process deserves attention beyond the lab. If it scales cleanly, it could give manufacturers a cheaper, faster route into the same chilled coffee aisle that has become more crowded and more margin-sensitive across Australia.
For FMCG players, the message is clear: process innovation is no longer back-office science, it is a front-line competitive tool. If this approach holds up in industrial settings, I would expect coffee processors to start rethinking what “cold brew” production really needs to look like.
If the technology scales as UNSW expects, the next competitive edge in coffee will come from who can brew faster, colder and cheaper without giving up flavour.
I’d be tracking this closely if I were managing coffee, RTD beverages or concentrate portfolios, because process gains like this can move from curiosity to category pressure faster than most teams expect.