The BECO INTEGRA LAB 220, a portable filtration unit with pump and round filter, was used to perform extensive tests on different types of depth filter sheets on a small scale. The final filtration solution was subsequently scaled up to the actual production plant, making it easier to find suitable depth filter sheets and cost savings.
Results from the Jägermeister laboratory test indicated that the most effective way to remove the haze-causing substances was to combine the depth filter sheets from the BECO standard and BECO SELECT A ranges. This involved using Eaton’s BECODISC stacked disc cartridges from the BS range with a retention rate of 2.5 µm as the prefilter and BECODISC BA 20 with a retention rate of 0.8 µm for fine filtration.
The depth filter sheets in the stacked disc cartridges feature a large-volume cavity providing a particularly high haze-removal capacity. The pore structure not only enables the components requiring separation to be reliably retained, but also results in an economic service life. During the downstream fine filtration process, the liqueur passes through the stacked disc cartridges, which were specially developed for applications in the spirits industry.
The filters retain the finest particles, as well as specifically retain long-chain fatty acid esters that cause haze in the liqueur and can have a negative effect on the sensory profile and taste. Short-chain fatty acid esters, adding sensory qualities to the liqueur, can pass through the filter material almost entirely.
A special feature of these filter sheets is the low iron, calcium and magnesium ion content that can cause haze and discoloration in alcoholic products. Moreover, because the material only absorbs a minimum amount of color, the dark copper tones of Mast-Jägermeister’s premium herbal liqueur remain unaffected. “We use these stacked disc cartridges to cold filter the Jägermeister Manifest—that is, we cool the product down to between 30°F and 32°F so that the haze-causing substances can be safely removed by the filters,” Finke says.
“Eaton's solution will keep Jägermeister Manifest clear and undamaged,” Finke adds. “The choice of filters fits our needs exactly, as they precisely cover the range of substances responsible for turbidity. The stacked disc cartridges not only give us the exact result we want, but they also have a long service life and are easy to use.” FE