Effect of Settling Methods on White (Chardonnay) and Rosé (Syrah) Wines Quality

In this study, we compared the effect of gravity settling and flotation on white and rosé wines produced from chardonnay and Syrah varieties respectively during 2019 vintage. First, the course of fermentation was monitored according to the density. The settling technique did not affect the fermentation process for different tested wines. After wine production, stabilization and bottling, we focused on pH, conductivity, total acidity, volatile acidity, color parameters, phenolic compounds content, aromatic composition and the sensory properties of the studied wines. Contrary to fermentation, the obtained results showed that the wine studied parameters were significantly influenced by the settling technique. Overall, the floating procedure improved the wine characteristics and could be used as an alternative to gravitational settling.