Abstract
Citrus fruit juices are important sources of bioactive compounds such as provitamin A carotenoids (β-cryptoxanthin, β-carotene), and flavonoids (hesperidin, narirutin) that contribute along with vitamins, minerals and fibers to their beneficial health effects. Crossflow microfiltration is a non-thermal and low energy consuming process increasingly used for insoluble solid concentration in liquid foods. As previously demonstrated at laboratory scale (membrane area 1.5‧10-2 cm²), an optimized CMF process has allowed to obtain with satisfactory performances nutrient-dense foods, up to 8-10 folds enriched in carotenoids and flavonoids, from citrus juices without increasing sugar content.