Abstract: The present invention relates to a filtration device comprising: at least one enclosure (1; 1A, 1B; 1A, 1B, 1C, 1D) defining a longitudinal axis, said enclosure being obstructed at each end by at least one sealing plate (2A, 2B; 2C, 2D), at least one filtration disc (4) that is rotated and at least one spacer (10) placed between each filtration disc (4), said spacer (10) defining an inter-disc space (10A), at least one hollow rotation shaft (3; 3A) that rotates said at least one filtration disc (4), said shaft having at least one port (33) adapted to collect filtrate (11A, 11B), said filtration disc (4) and said spacer (10) being arranged on said at least one rotation shaft (3; 3A, 3B) inside said enclosure (1; 1A, 1B; 1A, 1B, 1C, 1D), characterised in that said enclosure (1; 1A, 1B; 1A, 1B, 1C, 1D) is passed through by said at least one rotation shaft (3; 3A), and said rotation shaft (3; 3A) is driven by at least one separate rotation means (5, 5A, 5B, 5C) on at least one of the ends of said shaft, said r

Abstract: The present invention relates to a device and a method for recovering a large and dry precipitated solid inorganic final product (3D), consisting of phosphorus, nitrogen and an element X selected from the alkaline-earth metals, from a first fluid (1) consisting of at least one divalent cation X2+ mixed with a second fluid (2) containing phosphorus and nitrogen, said device including at least one first reactor (19) which is intended for a primary crystallization reaction, has any shape, and is connected to a second spiral-shaped reactor (20) for secondary crystallization/deposition.

Abstract: The present invention relates to a device and a method for recovering a large and dry precipitated solid inorganic final product (3D), consisting of phosphorus, nitrogen and an element X selected from the alkaline-earth metals, from a first fluid (1) consisting of at least one divalent cation X2+ mixed with a second fluid (2) containing phosphorus and nitrogen, said device including at least one first reactor (19) which is intended for a primary crystallization reaction, has any shape, and is connected to a second spiral-shaped reactor (20) for secondary crystallization/deposition.

Abstract: The invention relates to a device and a method for anaerobic treatment of wastewater in a biological reactor (100) involving at least one stabilised bacteria species including the following steps: measuring (150) a concentration, in an area linked to the reactor, of a reaction product inhibiting said at least one bacteria species; extracting (160) a fraction of the contents of the reactor when said concentration exceeds a predefined threshold; separating (300) said fraction into first and second sub-fractions, the first sub-fraction being depleted of said reaction product; and recirculating (310) the first sub-fraction in the reactor.

Abstract: The invention relates to a device and a method for treating water to be treated, said method involving a filtration through at least one membrane coupled to an activated sludge reaction chamber, characterised in that added particles are present in at least one volume of activated sludge in contact with the membrane and in that variations in a flow generated in said volume of activated sludge parallel to the membrane are applied, enabling the creation of a level of average turbulent intensity greater than that corresponding to a constant flow in the immediate proximity of the membrane.

Abstract: The invention relates to a method for the biological treatment of an effluent to be treated and containing at least two forms of pollution, one of which is more easily biodegradable than the other, which comprises using a main biological treatment area in which the raw effluent is contacted with biological sludge adapted for consuming a first form of pollution that can be more easily degraded than a second form of pollution, wherein said method is characterised in that comprises collecting a fraction at least of the biological sludge which is isolated at a distance from the main biological treatment area in a so-called bioactivation area and under aeration and time conditions adapted for triggering in said fraction the development of new biological functions capable of consuming the second form of pollution, and further recycling at least a portion of said biological sludge fraction towards the main biological treatment area.