Precise control of dissolved gases is critical in winemaking, particularly when producing still or sparkling wines that demand stability, freshness, and consistent quality. The Lyna Pervélys system from Bucher Vaslin uses an advanced hydrophobic hollow fibre membrane to achieve highly accurate gas management. Here’s how it works:
The Operating Principle
At the heart of Lyna Pervélys is a microporous hydrophobic membrane made of hollow fibres. Unlike traditional filtration, which moves liquid in a single direction, this process enables two-way gas transfer between liquid and gas phases.
- Liquid circulation – Liquid flows along the membrane wall, creating close contact with the gas exchange surface.
- Gas feed – CO₂ is introduced at one end of the membrane while a vacuum pump applies suction at the other.
- Pressure differential – The vacuum creates a difference in pressure, driving precise gas transfer across the membrane pores.
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Gas exchange – Depending on the requirements, the process can increase or reduce CO₂ levels, while simultaneously enabling deoxygenation of the wine. Oxygen transfers from the liquid into the gas phase, protecting wine quality and freshness.
Why This Matters for Winemakers
- Accuracy – Gas levels are finely controlled for optimal balance.
- Flexibility – The same system allows CO₂ addition or removal as well as oxygen reduction.
- Preservation – Deoxygenation extends product stability and improves longevity.
- Consistency – Inline adjustments ensure repeatable, reliable results every time.
Is it necessary to prepare the product before treatment?
Yes, the product needs to be filtered, at a grade of <5 microns, before treatment. Ideally using a tangential filtration system, and even better with a Flavy Filter from Bucher Vaslin. EG the Lyna can be positioned in line behind the tangential filter.
By harnessing the power of hydrophobic hollow fibre membranes, the Lyna Pervélys delivers a precise and efficient method of managing dissolved gases in wine. For Australian winemakers, this technology means greater control over product quality, extended preservation, and the ability to tailor wine styles with confidence.