Lab Scale 20khz 1500W Ultrasonic Cold Brew Coffee

Description

This is an innovative process that integrates ultrasonic non-thermal extraction technology into traditional cold brew. Its core principle is to utilize cavitation to rapidly extract coffee flavor, significantly reducing extraction time while preserving the smooth, low-acid characteristics of cold brew. It is increasingly being used in commercial mass production and specialty coffee settings.

Core Principle: High-frequency ultrasound (20kHz and above) generates numerous microbubbles in a low-temperature water medium. The instantaneous collapse of these bubbles creates localized high-pressure microjets and shear forces, precisely breaking down the cell walls of coffee grounds, allowing caffeine, chlorogenic acid, and aromatic compounds to dissolve rapidly. The temperature is controlled throughout the process between 5–20℃ to prevent heat-sensitive aroma degradation and excessive acidification caused by high temperatures.

Parameter

I. Working Principle Ultrasonic cold brew coffee utilizes ultrasound-assisted low-temperature extraction technology. Without heating or damaging the coffee's flavor, it accelerates the dissolution of flavor compounds through physical processes.

1. Cavitation Effect (Core Principle) Ultrasonic frequencies are typically between 20kHz and 40kHz, generating numerous tiny bubbles in water.

These bubbles continuously expand and contract, eventually bursting and collapsing instantly.

The collapse generates localized high temperature and pressure, microjets, and strong shear forces, directly impacting and breaking down the cell walls and structure of the coffee grounds.

2. Enhanced Mass Transfer The microjets wash over the surface of the coffee particles, allowing water to penetrate the coffee interior more quickly.

The flavor compounds diffuse into the water more rapidly, significantly increasing extraction speed and yield.

3. Physical Effects at Low Temperatures The entire process takes place in cold water (0–25℃), relying solely on the physical energy of ultrasound for extraction, hence the name "cold brew." II. Main Functions and Effects

1. Significantly Reduces Extraction Time

Traditional Cold Brew: 12-24 hours

Ultrasonic Cold Brew: A few minutes to tens of minutes

Effect: Improves efficiency, suitable for rapid mass production in coffee shops and factories.

2. Low-Temperature Extraction, Preserving Better Aroma

No heating, preserving volatile aroma compounds

No burnt or bitter taste or acidity caused by high temperatures

Smoother, cleaner taste, lower acidity and milder flavor

3. Increases Coffee Extraction Rate, Saving Raw Materials

Ultrasonic waves can more fully extract from coffee:

Aromatic substances

Oils

Chlorogenic acid and other antioxidants

With the same amount of coffee powder, a stronger flavor and higher utilization rate.

4. Improved Taste and Uniformity
Microjets ensure more uniform extraction, preventing localized over-extraction/under-extraction.
Smoother emulsification results in a richer, smoother coffee flavor.
Reduces grounds and off-flavors.

5. Suitable for Industrial Production
Allows continuous, pipelined production of cold brew coffee concentrate.
High batch stability, easy to standardize.
Widely used in bottled cold brew coffee, espresso concentrate, and ready-to-drink (RTD) coffee.

III. Simple Summary

Principle: Utilizing ultrasonic cavitation effect + microjets, physically breaks down coffee cells, enhances mass transfer, and enables rapid extraction at low temperatures.

Benefits: Fast, fragrant, pure, and economical; significantly reduced extraction time, cleaner flavor, and more complete extraction; suitable for commercial and industrial applications.

Key Features

High-Efficiency Mixing: Utilizes ultrasonic waves to create intense shear forces, ensuring thorough mixing and emulsion stability.Nanoemulsion Creation: Capable of producing stable nanoemulsions, improving bioavailability and product quality.Adjustable Settings: Features adjustable amplitude and processing time for customizable applications.Sturdy Stand: Comes with a robust stand, providing stability during operation and saving valuable lab space.User-Friendly Design: Simple controls and an intuitive interface for easy operation.Technical Specifications Frequency: Typically operates at 20 kHz to 40 kHz.Power Output: Available in various wattages (e.g., 250W, 500W). Processing Volume: Suitable for small batches, ranging from 10 mL to 1 L. Construction: Made from high-grade stainless steel for durability and easy maintenance.

Applications

Pharmaceuticals: Enhances drug formulation and extraction processes.Food and Beverage: Ideal for emulsifying oils, improving texture and stability in products.Cosmetics: Facilitates the creation of creams and lotions with consistent quality. Research and Development: Essential for experimental applications requiring precise emulsification and mixing.Why Choose This Ultrasonic Homogenizer?Proven Performance: Trusted technology with a track record of success in various industries.Competitive Pricing: Offers excellent value for high-quality lab equipment.Comprehensive Support: Backed by a dedicated customer service team to assist with any inquiries.

Oil-in-water emulsions are an important vehicles for the delivery of hydrophobic bioactive compounds into a range of food products. The preparation of very fine emulsions is of increasing interest to the beverage industry, as novel ingredients can be added with negligible impact to solution clarity. In the present study, both a batch and focused flow-through ultrasonic cell were utilized for emulsification with ultrasonic power generation at 20–24 kHz. Emulsions with a mean droplet size as low as 135 ± 5 nm were achieved using a mixture of flaxseed oil and water in the presence of Tween 40 surfactant. Results are comparable to those for emulsions prepared with a microfluidizer operated at 100 MPa. The key to efficient ultrasonic emulsification is to determine an optimum ultrasonic energy intensity input for these systems, as excess energy input may lead to an increase in droplet size.Industrial relevanceThe preparation of oil-in-water emulsions is a common feature of food processing operations. The use of ultrasound for this purpose can be competitive or even superior in terms of droplet size and energy efficiency when compared to classical rotor­stator dispersion. It may also be more practicable with respect to production cost, equipment contamination and aseptic processing than a microfluidisation approach. The present paper shows that ultrasound can be effective in producing nanoemulsions for use in a range of food ingredients.

Main application
1. Chinese medicine extraction, cell, bacteria, virus tissue fragmentation/lysis. For example, extraction of cell contents, extraction of protein, nucleic acid, trimming of DNA, RNA, etc. 2. Research on nano material technology. 3. Dispersion and homogenization of material particles, and emulsification of products. For example, the dispersion of nanomaterials. 4. Speed up the dissolution and speed up the chemical reaction. For example, it is used in chemical synthesis. 5. Chromatin immunoprecipitation technology. 6. Ultrasonic catalysis induces chemical reactions. 7. Graphene dispersion, exfoliation and preparation. 8. Other application fields.