Ultrafiltration for improving head retention
The brewing industry uses separation processes for separating out suspended particles from liquid intermediate products in the brewing process (microfiltration) or ions in water treatment (reverse osmosis). Ultrafiltration is a separation process that covers the range from 5 to 500 kD and thus does not separate out particles but molecules in the size range down to 0.001 µm. This contribution presents research that focuses on enrichment of certain components resulting from ultrafiltration in order to improve quality parameters of beer. Foam-positive particles in particular could be successfully returned to the process.