Abstract: A must clarification device is provided comprising a vat into which the must is introduced in either a continuous flow or in batches. Located within a circular chamber in the vat is a turbine rotatable by external means. The must is introduced into the chamber by a centrally located pipe. An air pipe is located concentrically within the must pipe. The pipes are arranged to create a venturi effect to suck the air into the chamber. The turbine mixes the air and must and expells it from the chamber so that the air bubbles cause the impurities to rise to the surface where they are removed.

Abstract: A method is provided for exchanging substances being in a gaseous state between at least two fluids, namely a first fluid and a second fluid. The method is comprising the steps of using wine as the first fluid, using CO2 as the second fluid, adjusting a pressure difference between first flow channels of the first fluid and second flow channels of the second fluid for allowing CO2 to pass through membranes into the wine, measuring a CO2 concentration within the wine by means of at least one CO2-measuring sensor, adjusting an amount of CO2 which is passing through the membranes by regulating mass flows, temperatures and/or pressures of wine and CO2, respectively. Furthermore, an apparatus (10) is provided for controlling concentrations of substances within at least two fluids and for exchanging substances between at least two fluids.

Abstract: A must clarification device is provided comprising a vat into which the must is introduced in either a continuous flow or in batches. Located within a circular chamber in the vat is a turbine rotatable by external means. The must is introduced into the chamber by a centrally located pipe. An air pipe is located concentrically within the must pipe. The pipes are arranged to create a venturi effect to suck the are into the chamber. The turbine mixes the air and must and expels it from the chamber so that the air bubbles cause the impurities to rise to the surface where they are removed.