3 Sep 2013 --- Tetra Pak, the world leader in food processing and packaging solutions, has acquired Denmark-based DSS Silkeborg A/S, a European market leader in dairy membrane filtration technology. Established in 2000, DSS is a privately held company with 46 employees that develops, designs, sells, builds and commissions membrane filtration systems for dairy applications, using reverse osmosis, nano-filtration, ultra-filtration and micro-filtration technologies.