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Raspberry (Rubus idaeus L.) juice processing using an innovative spiral filter press
Jelena Nagypál1, Vicky Bäumer1, Annette Wagner1
1Department of Beverage Research, Chair Analysis & Technology of Plant-based Foods, Geisenheim University, Von-Lade-Strasse 1, 65366 Geisenheim, Germany.
Food Chemistry
|August 5, 2026
Summary
An innovative spiral filter press produced raspberry juice with higher micronutrients and better sensory quality compared to conventional methods. Consumers preferred the juice from the spiral filter press, indicating superior quality.
Area of Science:
- Food Science
- Horticultural Science
- Nutritional Science
Background:
- Raspberry juice production traditionally uses horizontal filter presses.
- Optimizing juice extraction impacts quality and consumer acceptance.
- Novel dejuicing technologies warrant investigation for improved outcomes.
Purpose of the Study:
- To characterize raspberry juices produced by a spiral filter press versus a conventional horizontal filter press.
- To evaluate phytochemical composition and sensory attributes.
- To determine consumer preference for juices from different processing methods.
Main Methods:
- Juice production using spiral and horizontal filter presses.
- Analysis of juice quality attributes (turbidity, pulp content, particle size, viscosity).
- Phytochemical analysis (ascorbic acid, carotenoids, tocopherols, anthocyanins).
- Sensory evaluation by a consumer panel (n=53).
Main Results:
- Spiral filter press yielded more turbid juices with higher pulp content, larger particle sizes, and increased viscosity.
- Spiral filter press processing elevated ascorbic acid, carotenoid, and tocopherol levels.
- Anthocyanin content remained similar between the two methods.
- 79% of consumers preferred the raspberry juice produced by the spiral filter press.
Conclusions:
- The spiral filter press enhances micronutrient levels in raspberry juice.
- This innovative technology significantly improves the sensory quality and consumer acceptance of raspberry juice.
- Spiral filter press technology offers a promising alternative for superior raspberry juice production.
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