Device and method for simultaneously producing separate filtrates from a single substrate

A filtration method implemented by a device including

• at least one enclosure defining a longitudinal axis, said at least one enclosure being obstructed at each end by at least one sealing plate,
• a plurality of filtration discs that are each rotated,
• at least one spacer disposed between each of two of the plurality of filtration discs, said at least one spacer defining an inter-disc space,
• at least one hollow rotation shaft rotating said plurality of filtration discs, said at least one rotation shaft having at least two ports configured to collect different filtrate from the at least one spacer toward an interior of the at least one hollow rotation shaft, the at least one hollow rotation shaft passing through the at least one enclosure, said plurality of filtration discs and said at least one spacer being arranged on said at least one hollow rotation shaft inside said at least one enclosure, said at least one hollow rotation shaft being driven by at least one separate rotation device on at least one end of the plurality of ends of said at least one hollow rotation shaft, said at least one separate rotation device and said respective at least one hollow rotation shaft being coaxial,
• at least two separate discharge devices configured to respectively discharge the different filtrate collected by a respective port of the at least two ports, said at least two separate discharge devices being disposed on said at least one hollow rotation shaft outside said at least one enclosure and upstream of said at least one separate rotation device, and
• at least one introduction system configured to introduce liquid to be filtered,
• said method comprising:
• introducing the liquid to be filtered by the at least one introduction system;
• rotating the at least one hollow rotation shaft by at least one rotation device separate from at least one of ends of said at least one hollow rotation shaft;
• filtering said liquid to be filtered by passing the liquid through at least one of the filtration discs;
• obtaining a concentrate inside the enclosure;
• discharging said concentrate from said enclosure by at least one outlet for said concentrate;
• obtaining the different filtrate collected by the at least two ports located on said at least one rotation shaft that are axial relative to said enclosure;
• discharging the respective different filtrate by a first discharge device a second discharge device, said first and second discharge devices being disposed on said at least one rotation shaft outside said enclosure and upstream of said at least one rotation device.