Centrifugation

Centrifugation is a separation technique that uses centrifugal force to separate components of a liquid by density, removing yeast cells, particulates, proteins, and other suspended materials from beer, wine, or other beverages. It is used in dealcoholization and clarification processes.

Industrial centrifuges for beverage processing operate at 3,000–15,000 RPM, generating centrifugal forces thousands of times greater than gravity. Under these forces, denser particles (yeast cells, protein aggregates, fruit pulp) migrate outward and are continuously discharged, while the clarified liquid flows through the center. The process can be continuous (separator centrifuges) or batch (bowl centrifuges) depending on the throughput and solids content.

In NA beer production, centrifugation serves two primary functions: yeast removal after fermentation (as part of arrested fermentation or cold contact fermentation protocols) and clarification before packaging. For dealcoholized beverages, centrifugation may also be used to remove heat-aggregated proteins formed during vacuum distillation that would otherwise produce haze in the finished product.

Centrifugation's advantage over filtration is speed and throughput — a continuous centrifuge can process thousands of liters per hour without filter clogging, making it essential for large-scale production. Its limitation is that it removes only particles above a minimum size; microorganisms small enough to remain in colloidal suspension may pass through, requiring subsequent sterile filtration for complete microbiological stability.

For premium zero-proof producers seeking a 'unfiltered' or 'natural' quality signal, centrifugation is sometimes preferred over diatomaceous earth or sheet filtration because it does not require filter aids that can strip polyphenols and aromatic compounds. The result is a centrifuge-clarified product that retains more of the beverage's original character while achieving acceptable visual clarity.