In this article, you’ll learn:
- Why traditional cold brew equipment limits your margins
- How cold brew equipment efficiency affects yield and cost per serving
- Whether faster cold brew equipment compromises quality
Market reports and industry trends continue to position cold brew as a growing category within speciality coffee and RTD beverages. For a coffee shop looking to keep up, investing in the right equipment matters more than ever.
Quality and freshness remain non-negotiable for consumers. Traditional cold production methods can deliver these, but speed of service, adaptability to variable demand, and efficiency are just as important – and that’s where modern cold brew equipment comes in.
The efficiency differences between traditional and modern systems are substantial, particularly in extraction time, yield, and operational flexibility. To break it all down, I turned to research by Dr Małgorzata Płaczek and Dr Dariusz Andrzejewski, both from the Faculty of Mechanical Engineering at Poland’s Opole University of Technology. Read on for their insights.
Why traditional cold brew equipment limits your margins
Traditional cold brew equipment limits margins because it relies on slow, small-batch extraction that cannot keep pace with variable demand.
“Traditionally, cold brew coffee is produced as a batch process based on slow, static extraction,” the authors explain. The two methods commonly relied upon, they add, are “full immersion or via slow percolation at 20–25°C for 6–24 hours.”
Such long production times are unlikely to meet the speed or convenience that today’s consumers expect, especially where demand is high or unpredictable.
Płaczek and Andrzejewski found that most commercial systems have small capacities – typically 1 to 5 L per batch – and long extraction times of 18–24 hours. Should stock run out, customers may have to wait half a day or more. That translates to lost sales and a reputation at risk.
Producing ahead of demand is one way to stay prepared, but unpredictable footfall makes losses just as likely as profit.
“Market expansion will require larger systems (20–30 L),” the researchers acknowledge. As long as older methods remain in use, they warn that this will “increase operational costs and refrigeration needs.”
One overlooked consequence of traditional extraction is the discarding of spent grounds. Not many businesses know they still contain a substantial portion of valuable chemical compounds.
“Traditionally treated as waste, these residues represent an underutilised resource,” the authors explain. With rising coffee prices, failing to fully extract the input material is a missed opportunity to recover costs.
Płaczek and Andrzejewski are convinced that “there’s a pressing need to develop faster, more efficient, and continuous extraction methods that can meet rising market demand, optimise production efficiency, and maintain product quality.”
How does cold brew equipment efficiency affect yield and cost per serving?
Modern cold brew equipment delivers a higher yield and a lower cost per serving by extracting more dissolved solids from the same dose of coffee, in a fraction of the time.
The efficiency gap between systems rarely registers until different methods are directly compared – and the numbers reveal clear differences in speed, yield, and operating costs.
Płaczek and Andrzejewski found that the indirect immersion method produces a lower concentration of total dissolved solids (TDS) despite taking comparatively longer. Extraction yields varied widely depending on grind size and time, with the longest runs still falling short of what modern systems achieve in an hour.
According to Hardtank’s co-founder, Maciej Duszak, ready-to-drink cold brew has a TDS concentration of 1.4%–1.6%, while stronger extractions are usually diluted before serving. In the literature reviewed by Płaczek and Andrzejewski, traditional methods can achieve considerably higher TDS values, but often require substantially longer extraction times.
The multi-stage percolation system in the authors’ experiments outpaced every conventional method on both TDS and extraction time. It “consistently achieved 2.65% TDS in just 60 minutes under ambient conditions.”
Modern systems like Hardtank’s Babytank and Hardtank 20 go further still, combining recirculation and agitation through a patented accelerated cold extraction technique to hit that mark in under an hour. That efficiency then extends beyond speed.
“Replacing water with an enriched extract improved efficiency by 36.2%,” the researchers note – meaning recirculation pulls far more flavour compounds from the grounds than plain water ever could.
More dissolved solids from the same coffee dose means more cups per batch, and that gives businesses a real choice: lower the cost per cup to compete, or hold the price and watch margins grow.
Does faster cold brew equipment compromise quality?
Faster cold brew equipment does not compromise quality. Research shows percolation-based methods can match or exceed the sensory results of traditional 24-hour processes.
“While immersion-based cold brew processes typically require up to 24 hours, percolation-based methods can achieve comparable or superior extraction within 30 to 120 minutes,” Płaczek and Andrzejewski point out.
Separate research on the percolation-based Hardtank method found that cutting production time to 30 minutes – without compromising percolation dynamics – delivered better aroma, flavour, and balance than traditional 24-hour maceration.
Płaczek and Andrzejewski’s study used speciality-grade coffee from Hard Beans Coffee Roasters with an SCA score of 83. A panel of five certified Q-graders who assigned that rating also evaluated the resulting extract using the SCA scoring system.
Uniformity and clean cup led the scores with a perfect 10. Flavour and overall impression followed at 8.5, with aroma, sweetness, and acidity slightly behind at 8.25. Body registered the lowest value at 7.75, with all other attributes scoring a solid 8.
“The beverage exhibited bright acidity, layered flavour complexity, and a clean, persistent aftertaste,” the authors note. For a cup produced in a fraction of the time traditional methods require, that is a remarkable result.
Keeping temperatures at or below 30°C also adds to cold brew’s sensory profile.
“These conditions are known to preserve thermolabile and oxidation-sensitive compounds,” the research says – the same compounds that shape flavour, aroma, and body that heat would otherwise destroy.
On safety, which is a known concern due to cold brew’s higher susceptibility to microbial activity, the results were also reassuring.
“Under hygienic production conditions and refrigerated storage (5°C), cold brew coffee remains microbiologically safe for up to five days,” the researchers confirm.
Płaczek and Andrzejewski’s findings make clear that traditional methods cannot match the speed, yield, and efficiency of modern systems built on multi-stage percolation. For businesses looking to scale cold brew production more efficiently, the findings suggest that modern percolation-based systems may offer significant operational and financial advantages.
Ready to cut costs, save time, and streamline your cold brew operation? Visit our website or contact us directly to find out what Hardtank’s commercial cold brew equipment can do for your business.
Cold brew equipment efficiency: Key takeaways
- Traditional cold brew equipment relies on slow, small-batch extraction that takes 18–24 hours, making it hard to meet variable demand without waste or stockouts.
- Modern cold brew equipment using multi-stage percolation can complete extraction in under an hour, with significantly higher yields than older methods.
- Faster extraction does not compromise quality. Percolation-based systems produce cups that score comparably or better than traditional 24-hour methods on SCA sensory criteria.
Looking to improve your cold brew equipment efficiency? Explore Hardtank’s solutions for cold brew production and RTD development, or contact the team to get started.
Cold brew equipment efficiency: FAQ
Does modern cold brew equipment produce a lower-quality cup than traditional methods?
No. Research by Płaczek and Andrzejewski shows that percolation-based systems achieve comparable or superior extraction to traditional immersion methods in a fraction of the time. Their tested extract scored 8.5 on flavour and overall impression from a panel of certified Q-graders.
How much more efficient is a multi-stage percolation system compared to traditional cold brew equipment?
Significantly more. Modern systems can complete extraction in under an hour, compared to the 18–24 hours traditional methods require. They also get considerably more out of the same dose of coffee, including from grounds that older methods would discard.
Is cold brew produced with modern equipment safe to serve?
Yes. Under hygienic production conditions and refrigerated storage at 5°C, cold brew remains microbiologically safe for up to five days, according to Płaczek and Andrzejewski’s research.
Want to learn more about our cold brew systems?
- Explore private label RTD: Learn how to launch your own canned coffee
- Discover your profits: With our ROI calculator.
- Speak to the team: Contact Hardtank here.
