Wine Clarification & Stabilization

Understand the primary filtration steps involved in the winemaking process

Our Wine Stabilization & Clarification Systems Improve Quality and Reduce Costs

Why is clarifying wine important?


Wine is a complex product constantly evolving from the moment the fermentation is complete right up to the time the cork is pulled. This complexity enables winemakers to deliver the individual appeal of each wine, however, this evolution can also lead to the formation of sediments and hazes that are not desirable in the finished product. 


Winemakers use wine stabilization and clarification techniques to improve the visual appearance and shelf stability of their wines.


The most common forms of wine sediment and haze formation are shown below:

  1. Post fermentation – Which is composed mostly of dead yeast cells (lees), bacteria, grape skins, grape seeds and tartrate crystals.
  2. During ageing – The proteins, phenolics, tannins and polysaccharides combine in various ways depending on the nature of the wine, leading to amorphous hazes and/or deposits. 
  3. At low temperature – The Bitartrate instability at low temperatures, can lead to significant deposits of tartrate crystals, which are harmless but can have an appearance similar to glass in white wines.



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We Support You by Increasing Yields and Reducing Waste During Wine Clarification & Stabilization

Winemakers have several filtration methods available when clarifying wine, each has its own pros and cons which are further explained below.


Common Techniques:


  1. Flat sheet filtration
  2. Lenticular filtration
  3. Diatomaceous Earth (DE) filtration
  4. Crossflow filtration
  5. Centrifugation
  6. Settling by gravity


Sheet filters have been used for wine clarification for over 130 years and continue to be used in smaller wineries throughout the world. 


For smaller wineries that need the flexibility to produce a variety of small batches, sheet filtration in plate and frame format can demonstrate advantages from both an economic and operational standpoint.


Lenticular modules, a modern adaptation of sheet filters assembled in an enclosed housing, avoid drip losses and provide additional flexibility, hygiene and ease of use.


Diatomaceous Earth (DE) filtration, also known as Kieselguhr filtration, was once the most common method for wine clarification on the larger scale. More recently DE has commonly been replaced by crossflow filtration equipment in all of the world’s winemaking regions.


Crossflow membrane systems enable cost savings by reducing wine loss, consumables and labor typically associated with filter aid based technologies. Furthermore, with a DE - free process and no solid waste for landfill, both environmental and operator safety are improved. 


Wine clarification using centrifugation is typically used at the larger wineries and is generally followed by a crossflow filtration system in order to achieve the clarity needed prior to bottling.


Settling by gravity combined with the addition of fining agents may also used but requires a significant amount of time that many modern wineries do not consider to be efficient.

Seitz® K Series Sheets

Developed to meet the entire range of removal requirements in the food and beverage industry. Available in multiple grades suitable for microbial reduction and applications requiring fine, clarifying and coarse filtration.

K Series SUPRAdisc™ II Lenticular Modules

The SUPRAdisc II modules are a design optimization of the traditional "Single Cell" modules which were originally launched on the market in the 1980s. 

SUPRApak™ Plus Modules

SUPRApak Plus modules are the second generation of our SUPRApak filter series that uses advanced sealing technology to seal unfiltrate to filtrate channels. 

The New Oenoflow™ PRO XL System

The Oenoflow PRO XL system introduces Pall’s new Optimizer algorithm which automatically adjusts system settings in real time based on the wine’s individual physical and chemical characteristics.

The Oenoflow™ XL-E System

The Oenoflow XL-E systems are specifically designed to meet the needs and requirements of small and mid size wineries

The Oenoflow™ FIT System

Pall's crossflow filtration system is an innovative solution for wine clarification and polishing. This modular system is upgradable and expandable to suit the working need of each winery.