A machine for continuous microfiltration of suspended solid particles from process and/or waste water, comprising a base container with an inlet conduit for the liquid to be filtered, defining a flow direction, said container having therein: - an influent chamber for collecting the liquid to be filtered; - a treatment chamber placed downstream from said influent chamber, and having an at least partially cylindrical bottom wall; - at least one pair of filter disks, which are keyed to a shaft substantially perpendicular to said flow direction, said disks having inner filtering surfaces adapted to delimit said treatment chamber and outer peripheral edges in sliding contact with said bottom wall; - at least one effluent chamber for receiving the filtered liquid, located downstream from said treatment chamber delimited by said pair of disks, said effluent chamber having a discharge conduit formed in said container; - drive means (13, 14) acting upon said shaft and/or on said disks for causing rotation thereof in a predetermined direction; - jet washing means directed against the outer surfaces (10") of said disks for removing the particles retained thereby; - means for conveying the solid particles removed by said washing means, comprising at least one first collecting duct disposed between said disks above said treatment chamber and having substantially parallel side edges, located at a predetermined minimum distance from said inner surfaces of said disks for collecting the removed solid particles; wherein each filter disk comprises a bearing structure having a substantially circular peripheral edge joined to a central hub through radial elements to define a series of wedge-shaped compartments, each wedge-shaped compartment being designed to support a substantially sector-shaped filter element, wherein each filter element comprises a grid-like mount with a peripheral frame corresponding to that of each wedge-shaped compartment upon which a corresponding portion of filter mesh is fixed with a predetermined minimum tension, said filter elements being anchored to said bearing structure with the side edges of said grid-like mounts being in mutual contact to define a substantially rigid and integral assembly with substantially continuous and flat inner surfaces, so as to reduce the planarity error (ε) of said inner surfaces to a value smaller than said predetermined minimum distance to increase the collection of the removed solid particles and limit their fall into said treatment chamber, characterized in that the predetermined minimum tension is of at least 20 N/cm and in that said bearing structure, said filter mesh and said mounts are made of stainless steel. - an influent chamber for collecting the liquid to be filtered; - a treatment chamber placed downstream from said influent chamber, and having an at least partially cylindrical bottom wall; - at least one pair of filter disks, which are keyed to a shaft substantially perpendicular to said flow direction, said disks having inner filtering surfaces adapted to delimit said treatment chamber and outer peripheral edges in sliding contact with said bottom wall; - at least one effluent chamber for receiving the filtered liquid, located downstream from said treatment chamber delimited by said pair of disks, said effluent chamber having a discharge conduit formed in said container; - drive means (13, 14) acting upon said shaft and/or on said disks for causing rotation thereof in a predetermined direction; - jet washing means directed against the outer surfaces (10") of said disks for removing the particles retained thereby; - means for conveying the solid particles removed by said washing means, comprising at least one first collecting duct disposed between said disks above said treatment chamber and having substantially parallel side edges, located at a predetermined minimum distance from said inner surfaces of said disks for collecting the removed solid particles;