CH717485B1 - Installation for the treatment of waste water from a WC and sanitary unit comprising such an installation. - Google Patents

Abstract

The invention relates to an installation (5) for treating waste water from a WC (3), comprising a solid/liquid separation filter (25) and a liquid recirculation circuit (27), for conveying a liquid from said filter to a tank (11). The installation (5) is remarkable in that the filter (25) comprises an inlet intended to be connected to a basin, a solid/liquid separation module, a first outlet connected to an evacuation duct and a second outlet connected to the recirculation circuit, said filter (25) conveying solid matter to said first outlet and liquid matter to said second outlet, said installation also being remarkable in that said recirculation circuit comprises a filtration assembly designed to make said liquid drinkable . The invention also relates to a sanitary unit (1) comprising such an installation.

Description

The present invention relates to a waste water treatment plant for a toilet and a sanitary unit comprising such a facility.

[0002] In the field of sanitary facilities, controlling water consumption is a recurring problem, the impact being both economic and ecological.

[0003] In particular, as regards the field of water closets, designated by the acronym "WC" in the remainder of the description, the number of people having access to toilets with flushing systems continues to increase. grow in the world given the increase in the world's population.

[0004] In an attempt to control this consumption, many solutions of the prior art aim to reduce the volume of water necessary for the operation of flushing systems.

Another solution of the prior art is that referred to in document US Pat. No. 5,045,188, which provides an installation comprising a complete sanitary unit, further comprising a toilet and a circuit for recirculating the waste water from the toilet. .

[0006] However, this assembly has several drawbacks.

[0007] First of all, the design of the wastewater treatment installation is particularly complex.

Also, this installation includes a tank mounted under the toilet bowl, making its use incompatible with an existing toilet.

[0009] Then, the solids are recovered in a tank intended to be emptied manually. There is thus no automatic connection to a solid matter discharge pipe.

[0010] Also, the filters used do not guarantee the potability of the water recovered at the outlet of the recirculation circuit.

[0011] Furthermore, the installation is not connected to an external water supply.

Finally, the operation of the WC is not guaranteed during a power cut, electricity being necessary to operate the installation.

The present invention aims to overcome the above drawbacks, and to this end relates to a waste water treatment installation for a toilet, comprising: a solid/liquid separation filter intended to be mounted at the outlet of a toilet bowl, and a liquid recirculation circuit, arranged to convey a liquid from said separation filter to a main tank of said WC, said installation being remarkable in that the solid/liquid separation filter comprises at least: an inlet, intended to be connected to the outlet of the bowl of said WC, a solid/liquid separation module, designed to separate solid materials from liquid materials, a first outlet, intended to be connected to the inlet of an evacuation duct, a second outlet, connected to said liquid recirculation circuit, said separation filter being designed to convey solid matter from said separation module to said first outlet and to convey liquid matter from said separation module to said second outlet, said installation being further remarkable in that said liquid recirculation circuit comprises a filtration assembly designed to make said liquid material drinkable during the passage of said liquid material in said filtration assembly.

Thus, by planning to equip the installation of the invention with a solid/liquid separation filter comprising an inlet intended to be connected to the outlet of the toilet bowl, the mounting of the installation of the invention on an already existing WC.

[0015] The installation of the installation is then greatly simplified while leaving the user free to choose the WC.

[0016] The manufacturing cost of the installation is consequently optimized.

[0017] Also, equipping the recirculation circuit with a filtration assembly designed to make the liquid coming from the separation filter drinkable makes it possible to create a closed circuit, considerably reducing the quantity of water necessary for the operation of a WC equipped with the installation of the invention.

[0018] According to optional characteristics of the installation according to the invention: the filtration assembly of the liquid recirculation circuit comprises a prefiltration device and an ultrafiltration device, connected in series. This makes it possible to obtain in a particularly simple manner a filtration assembly designed to make the water leaving the ultrafiltration device drinkable; in one embodiment, the solid/liquid separation filter comprises a casing inside which the solid/liquid separation module is mounted, and the solid/liquid separation module is a rotary sieve driven by an electric motor; in one embodiment, the separation filter comprises a nozzle for cleaning the rotary sieve, and the installation comprises a cleaning duct, connected at one of its ends to said cleaning nozzle, and intended to be connected to the other from its ends to a water inlet. By providing for direct connection of the separation filter to a water inlet, the cleaning of the separation filter is optimized; in one embodiment, the installation comprises a storage tank for liquid materials, supplied by the second outlet of the separation filter, and a hydraulic pump, arranged to extract the liquid materials contained in said storage tank; in one embodiment, the installation comprises a device for draining the storage tank of liquid materials comprising a prefiltration pipe connecting the storage tank to the prefiltration device, a drain pipe, connected on the one hand to said prefiltration pipe and intended to be connected on the other hand to the evacuation conduit, and a set of control of the direction of circulation of the liquid materials, arranged in the installation to convey the liquid materials from the storage tank to the evacuation conduit; in one embodiment, the installation comprises a backwashing device for the prefiltration device, further comprising a prefiltration conduit to which the prefiltration device is connected, a washing conduit, connected on the one hand to said prefiltration device and intended to be connected on the other hand to a water inlet, a drain pipe, connected on the one hand to said pre-filtration pipe and intended to be connected on the other hand to the evacuation pipe, and a control assembly the direction of water circulation, arranged in the installation to route water from a water inlet to the pre-filtration device, then from the pre-filtration device to the evacuation duct; in one embodiment, the liquid material storage tank comprises an upper cover having an orifice receiving the second outlet of the solid/liquid separation filter; in one embodiment, the solid/liquid separation filter comprises two arms for fixing the prefiltration device and the ultrafiltration device.

The present invention also relates to a sanitary assembly, remarkable in that it comprises: a toilet, comprising a bowl and a flushing system, said flushing system comprising a main tank, said main tank being connected to a water inlet and to said bowl, and an installation according to the invention, for the treatment of waste water from said WC.

Other characteristics, objects and advantages of the invention will appear on reading the following detailed description for the understanding of which reference will be made to the accompanying drawings in which: FIG. 1 schematically represents the sanitary assembly according to one embodiment of the invention, in rear isometric view; Figure 2 illustrates the solid/liquid separation filter of the invention; Figure 3 is an enlargement of area III of Figure 2; Figure 4 is an enlargement of area IV of Figure 2; FIG. 5 schematically represents the sanitary assembly of one embodiment of the invention, in rear isometric view; Figure 6 is a hydraulic diagram of the sanitary assembly of one embodiment of the invention; FIG. 7 shows an embodiment of the arrangement between the filter of an embodiment of solid/liquid separation and the storage tank of the installation of the invention.

In all the figures, identical or similar references represent identical or similar bodies or sets of bodies.

Referring to Figure 1 schematically shows a sanitary assembly 1 according to the invention, in rear isometric view.

The sanitary unit 1 comprises a water closet 3, designated in the following description and in the claims by the acronym "WC", and an installation 5 for the treatment of waste water from the WC 3.

[0024] The toilet 3 comprises a bowl 7 and a flushing system 9. The flushing system 9 comprises in known manner a main tank 11, which can be supported by a frame 13 mounted behind a partition 15 separating the bowl 7 from the flushing system 9, the latter not being visible to a user. The main tank 11 is connected on the one hand to a water inlet 17 by a water inlet pipe 19, and on the other hand to the basin 7 via a flow pipe 21. A supply valve 23, for example an electrically controlled hydraulic valve, is mounted on the water inlet duct 19 in order to control the water supply to the main tank 11 via the water inlet 17.

The main tank 11 contains a float valve system 24, not visible in Figure 1 but shown in Figure 6, the operation of which is well known to those skilled in the art. When the flushing system 9 is activated, a valve located at the bottom of the main tank 11 opens, releasing the water contained in the main tank 11, which flows into the bowl 7 via the flow pipe 21. The float valve system then detects the drop in the water level in the main tank 11 and opens the water supply 17 until the water reaches a predetermined level initially defined during the installation of the WC.

According to the invention, the installation 5 for the treatment of waste water from the WC 3 comprises a filter 25 for solid/liquid separation and a circuit 27 for liquid recirculation.

The solid / liquid separation filter 25 is connected to an outlet 29 of the bowl 7 and interfaces between the outlet 29 and an evacuation conduit 30, not shown in Figure 1 but visible in Figure 6, can be connected to a sewer line. The solid/liquid separation filter 25 is designed to separate the solid matter from the liquid matter expelled from the bowl 7 during the actuation of the flushing system 9. The solid/liquid separation filter 25 connects, in one hand, the outlet 29 of the bowl 7 to the discharge conduit 30, and connects the other outlet 29 to the circuit 27 of liquid recirculation. By design, the solid/liquid separation filter 25 separates the solid matter from the liquid matter which feeds it and then conveys the solid matter into the evacuation duct 30 and the liquid matter into the circuit 27 for liquid recirculation.

Reference is made to Figure 2 giving an embodiment of the filter 25 for solid / liquid separation.

The filter 25 for solid/liquid separation comprises a casing 31 inside which is mounted a module 33 for solid/liquid separation. The housing 31 actually comprises two half-housings, for example molded and assembled together. In Figure 2, only one of the two half-casings is shown in order to reveal the interior of the filter 25.

The filter 25 has an inlet 35 connected to the outlet 29 of the bowl 7 of the toilet 3, acting as a weir opening into the module 33 for solid / liquid separation. For this purpose, the inlet 35 has a slope 37 allowing the flow of solids and liquids from the bowl 7 to the module 33 for solid/liquid separation.

According to the embodiment of the filter 25 given in Figure 2, the solid / liquid separation module 33 is formed by a rotary screen 39, driven by means of a motor 40 not shown in Figure 2 but visible in Figure 6, for example an electric motor. The rotary sieve 39 comprises a cylindrical grid 41 driven in rotation around an axis of rotation 43 by the electric motor.

The rotation of the cylindrical grid causes a movement of solids from the inlet 35 to a first outlet 45 of the filter 25 for solid / liquid separation. The first outlet 45 is connected to the evacuation conduit 30 (visible in Figure 6), which can be connected to a sewer line. The first outlet 45 has a slope 47 allowing the flow of solid matter from the solid/liquid separation module 33 to the evacuation conduit 30.

The solid/liquid separation filter 25 has a second outlet 49 which is connected to the liquid recirculation circuit 27 (visible in FIG. 1). The solid/liquid separation filter 25 is designed to convey the liquid materials from the separation module 33 to the second outlet 49. To do this, the second outlet 49 is positioned under the cylindrical grid 41, so that the liquid material coming from from inlet 35 flows by gravity through grid 41, from inlet 35 to second outlet 49, and supplies liquid recirculation circuit 27 (visible in FIG. 1).

Note that the solid / liquid separation module 33 can be achieved by any separation device known to those skilled in the art capable of separating solid materials from liquid materials, in particular for example a centrifuge device.

[0035] The solid/liquid separation filter 25 may comprise a cleaning nozzle 51 connected to the water inlet 17 (visible in FIG. 1) via a cleaning duct 53, connecting the cleaning 51 to the water inlet 17. A cleaning valve 55 (visible in FIG. 1), for example an electrically controlled hydraulic valve, is mounted on the cleaning conduit 53 in order to control the water supply to the the cleaning nozzle 51 through the water inlet 17. The cleaning nozzle 51 is mounted inside the rotating screen 39.

As shown in Figure 3 which shows an enlargement of area III of Figure 2, the cleaning nozzle 51 is attached to a shaft 57 of the filtration module and is generally cylindrical in shape. The nozzle 51 comprises a set of orifices 59 distributed around the circumference of the nozzle 51 to project water onto the rotating screen in order to clean it.

In one embodiment of the solid / liquid separation filter 33 given in Figure 4, the housing 31 comprises in its inner part a scraper ramp 61 arranged between the first outlet 45 and the second outlet 49. In this way, when the sieve 39 is driven in rotation by the motor, the solids which remain on an outer wall 63 of the sieve when the sieve meets the scraper ramp 61 are discharged into the first outlet 45, in order to be conveyed into the conduit evacuation.

We now refer to Figures 5 and 6, respectively illustrating the sanitary assembly 1 in rear isometric view and a hydraulic diagram of this sanitary assembly, to describe the circuit 27 for liquid recirculation of the installation 5.

The liquid recirculation circuit 27 is arranged in the installation to route the liquid from the solid/liquid separation filter 25 to the main tank 11 of the WC 3, in order to allow the liquid material recovered by filter 25.

For this purpose, the liquid recirculation circuit 27 includes a filtration assembly 65 designed to make the liquid from the solid/liquid separation filter 25 drinkable after the passage of the liquid through the filtration assembly 65. .

To this end, the filtration assembly 65 comprises a prefiltration device 67 and an ultrafiltration device 69, connected in series with respect to each other.

The pre-filtration device 67 ensures a first filtration of the liquid material to be cleaned up from the filter 25 for solid/liquid separation. Typically, the prefiltration device 67 is obtained by a cartridge filter, such as that used in swimming pools. Such a filter ensures the filtration of particles of minimum size equal to 50 micrometers, that is to say that this filter does not retain particles having a size of less than 50 micrometers.

The ultrafiltration device 69 provides a second filtration of the liquid material to be cleaned up, coming from the solid/liquid separation filter 25 and then from the prefiltration device 67. Typically, the ultrafiltration device 69 is obtained by a membrane ultrafilter, such as that used in the food industry and in the medical field for the filtration of blood.

It has been found that when the liquid material from the solid/liquid separation filter 25 first passes through the pre-filtration device 67 then the ultrafiltration device 69, the liquid material which emerges therefrom is drinking water meeting the health standards in force in the strictest countries.

The water from the filtration assembly 65 can thus be routed to the main tank 11 of the WC 3.

The liquid recirculation circuit 27 is arranged in the installation 5 to convey the liquid material from the solid/liquid separation filter 25 to the main reservoir 11 after having passed through the filtration assembly 65.

The installation 5 comprises a reservoir 71 for storing liquid materials, mounted at the outlet of the filter 25 for solid/liquid separation and supplied with liquid materials by the second outlet 49 of the filter 25 for separation.

As illustrated in Figure 7, the tank 71 for storing liquid materials may have the general shape of a parallelepiped and comprises an upper cover 66 having an orifice 68 sized to receive the second outlet of the filter 25 for solid / liquid separation. The solid/liquid separation filter 25 may itself comprise two fixing arms 70, 72 making it possible to fix the prefiltration device 67 and the ultrafiltration device 69 respectively.

We refer again to Figures 5 and 6.

The capacity of the storage tank 71 is preferably greater than that of the main tank 11. The presence of the storage tank of such a capacity, directly connected to the second outlet 49 of the separation filter 25, makes it possible to use in part of the installation of the invention when the installation is not connected to the electrical mains, for example in the event of a power cut. Indeed, during a power cut, the separation filter 25, driven by an electric motor, would no longer operate. However, the solid materials continue to slide, less rapidly, by gravity, from the inlet 35 of the separation filter to the first outlet 45, while the liquid materials continue to fall by gravity into the second outlet 49 of the separation filter. separation, which conveys them to the storage tank 71 where the liquid materials are stored for the duration of the power cut. In addition, the storage tank 71 may comprise two overflow conduits 73, connected to the second outlet 49 of the separation filter 25 . This makes it possible to convey the liquid materials to the evacuation conduit 30 which can be connected to a sewer line, in the event that the power cut is prolonged.

The transport of the liquid material from the storage tank 71 to the inlet of the filtration assembly 65 is operated via a prefiltration conduit 75 connecting the storage tank 71 to the device. pre-filtration 67.

A hydraulic pump 77 mounted on the prefiltration conduit 75 allows the extraction of liquid materials from the storage tank 71 so that they are moved into the prefiltration conduit 75.

The hydraulic pump 77 is chosen so that the pressure with which the liquid materials extracted from the storage tank 71 pass through the prefiltration 67 and ultrafiltration 69 devices is sufficient for their proper functioning. In order to reduce the dimensioning of the hydraulic pump 77, it may be envisaged to mount an additional hydraulic pump at the outlet of the ultrafiltration device 69.

At the output of the hydraulic pump 77 is mounted a non-return valve 79 allowing the passage of a fluid from the hydraulic pump 77 to the pre-filtration device 67.

A prefiltration valve 81, for example an electrically controlled hydraulic valve, can optionally be mounted on the prefiltration conduit 75, between the hydraulic pump 79 and the prefiltration device 67.

A drain pipe 83, mounted between the non-return valve 79 and the pre-filtration valve 81, connects the pre-filtration pipe 75 to the evacuation pipe 30. A drain valve 85, for example a hydraulically controlled valve electric, is mounted on the drain pipe 83.

An ultrafiltration conduit 87 also connects the prefiltration device 67 to the ultrafiltration device 69, mounted in series with respect to the prefiltration device 67, so as to convey the liquid material from the prefiltration device 67 to to the ultrafiltration device 69.

An ultrafiltration valve 89, for example an electrically controlled hydraulic valve, can be mounted on the ultrafiltration conduit 87, between the prefiltration device 67 and the ultrafiltration device 69.

A washing conduit 91, mounted between the prefiltration device 67 and the ultrafiltration valve 89, connects the prefiltration device 67 to the water inlet 17.

On the washing pipe 91 are mounted a non-return valve 93 and a washing valve 95, for example an electrically controlled hydraulic valve. The non-return valve 93 is mounted in the washing pipe 91 so as to allow the passage of a fluid from the water inlet 17 to the ultrafiltration pipe 87.

Finally, a return pipe 97 connects the ultrafiltration device 69 to the main reservoir 11. The circuit 27 for recirculating liquid thus defines a closed circuit.

The various components of the installation 5 are controlled by a programmable control unit (not shown) which may be part of the installation 5, or external to the installation 5. This programmable control unit is configured, in particular , to manage the changes of state of the valves 23, 55, 81, 85, 89, 95, to control the triggering of the motor 40 and the starting of the hydraulic pump 77, to actuate the pre-filtration device 67 and the device ultrafiltration 69.

The operation of the sanitary unit 1 is as follows.

[0064] When a user activates the flushing system 9, the water contained in the main tank 11 flows through the flow conduit 21 into the bowl 7.

The materials present in the bowl are extracted from the bowl 7 through the outlet 29.

The motor of the solid/liquid separation filter 25 is then actuated and controls the rotation of the sieve 39. The materials present in the bowl 7 are thus filtered for the first time. The solid matter is routed to the first outlet 45 of the filter 25 and then reaches the evacuation pipe 30 which can be connected to a sewer line. As for the liquid materials, they pass through the sieve of the separation filter 25 and fall by gravity into the second outlet 49, until they reach the storage tank 71.

The hydraulic pump 77 is then actuated, for example after a predetermined period which may for example be between 5 and 10 seconds. The hydraulic pump 77 then extracts the liquid materials from the storage tank 71, thus displacing the liquid materials in the pre-filtration conduit 75. The liquid materials pass through the non-return valve 79 then the pre-filtration valve 81, which is normally open. The drain valve 85, normally closed, prevents the liquid materials from borrowing at this stage the drain pipe 83 connected to the evacuation pipe 30. The liquid materials thus reach the pre-filtration device 67 within which a second filtration is operated.

The ultrafiltration valve 89, normally open, allows the passage in the ultrafiltration conduit 87 of liquid materials from the prefiltration device 67, while the non-return valve 93 prohibits liquid materials from the prefiltration device 67 to use the washing pipe 91. The liquid materials then reach the ultrafiltration device 69, operating a third filtration making it possible to obtain drinking water.

[0069] The drinking water is then routed via the return pipe 97 to the main tank 11.

The installation 5 is sequenced so that the supply valve 23 closes as soon as the flushing system 9 is activated. The supply valve 23 resumes its open state when the filling of the main tank 11 with the drinking water conveyed by the return conduit 97 is finished. The float valve system 24, connected to the supply valve 23, resumes its function when the supply valve 23 is opened. The float valve system thus fills the lack of water in the tank, which may possibly arise due to losses intrinsic to the operation of the sanitary unit.

According to one arrangement of the invention, the control unit opens the cleaning valve 55 when the flushing system 9 is actuated in order to clean the filter 25 for solid/liquid separation. In this way, the water coming from the water inlet 17 reaches the cleaning nozzle 51 via the cleaning duct 53. The cleaning nozzle 51 thus projects water onto the rotating sieve in order to clean it. The control unit then switches the cleaning valve 55 from its open position to its closed position, for example when the hydraulic pump 77 is started.

According to another arrangement of the invention, the assembly formed by the washing duct 91 and the drain duct 83 defines a washing device against the current of the prefiltration device 67, the operation of which is as follows.

The control unit is configured to simultaneously switch the state of the washing valve 95, the state of the ultrafiltration valve 89 and the state of the drain valve 85.

This change of state is effected for example after a predetermined number of actuations of the flushing system 9. By way of example, this change of state, controlling the actuation of the backwashing device of the prefiltration device 67, intervenes after a cycle of twenty consecutive actuations of the flushing system 9.

During this change of state, the control unit simultaneously switches the washing valve 95 from its closed state to its open state, the ultrafiltration valve 89 from its open state to its closed state and the valve drain 85 from its closed state to its open state.

The water coming from the water inlet 17 consequently flows into the washing conduit 91 then passes through the non-return valve 93 before arriving against the current in the pre-filtration device 67, the ultrafiltration valve 89 being closed.

The water laden with impurities collected in the prefiltration device 67 then passes through the prefiltration valve 81, open, then reaches the drain pipe 83 due to the presence of the non-return valve 79 in the prefiltration pipe 75 and the drain valve 85 in the open position in the drain pipe 83. The dirty water is then routed through the drain pipe 83 to the drain pipe 30 which can be connected to a sewer line.

The assembly formed by the washing valve 95, the non-return valve 93, the ultrafiltration valve 89, the pre-filtration valve 81, the non-return valve 79 and the drain valve 85 defines a set of control of the direction of water circulation, arranged in the installation 5 to route the water from the water inlet 17 to the pre-filtration device 67, then from the pre-filtration device 67 to the evacuation duct 30.

[0079] The control unit is configured so that the hydraulic pump does not activate until the backwash cleaning sequence is complete.

The fact of providing regular cleaning of the solid/liquid separation filter 25 and of the pre-filtration device 67 makes it possible to optimize the longevity of the installation 5. In addition, this makes it possible to guarantee optimum quality of the filtration operations. . The amount of water used to implement the steps of cleaning the solid/liquid separation filter 25 and backwashing the pre-filtration device 67 is negligible with regard to the savings made by the installation 5.

According to yet another arrangement of the invention, the assembly formed by the pre-filtration pipe 75, the hydraulic pump 77 and the emptying pipe 83 defines a device for emptying the tank 71 for storing liquid materials, the operation is as follows.

The control unit is configured to simultaneously switch the state of the pre-filtration valve 81 and the state of the drain valve 85 and to control the starting of the hydraulic pump 77.

This change of state is operated for example after a predetermined number of actuations of the flushing system 9. For example, this change of state, controlling the actuation of the emptying device of the storage tank 71 of liquid materials, occurs after a cycle of twenty consecutive actuations of the flushing system 9. The start of this cycle is for example triggered off-line from the cycle used to trigger the washing device of the pre-filtration device 67.

During this change of state, the control unit simultaneously switches the prefiltration valve 81 from its open state to its closed state and the drain valve 85 from its closed state to its open state and starts the hydraulic pump.

[0085] The liquid materials coming from the storage tank 71 flow into the pre-filtration pipe 75 then pass through the non-return valve 79 before reaching the drain pipe 83, the drain valve 85 being in the open position and the valve pre-filtration being in the closed position. The liquid materials are then routed through the drain conduit 83 to the evacuation conduit 30 which can be connected to a sewer line.

The assembly formed by the hydraulic pump 77, the non-return valve 79, the pre-filtration valve 81, and the drain valve 85 defines a set for controlling the direction of circulation of the liquid materials, arranged in the installation 5 to convey the liquid materials from the storage tank 71 to the discharge conduit 30.

[0087] It goes without saying that the present invention is not limited solely to the embodiments of this waste water treatment installation of a WC and of this sanitary assembly, described above solely by way of illustrative examples. , but on the contrary it embraces all the variants involving the technical equivalents of the means described as well as their combinations if these fall within the scope of the invention, as defined by the claims.

Claims (10)

1. Installation (5) for treating waste water from a toilet (3), comprising: – a solid/liquid separation filter (25) intended to be mounted at the outlet of a toilet bowl (7) (3), and – a liquid recirculation circuit (27), arranged to convey a liquid from said solid/liquid separation filter (25) to a main tank (11) of said WC (3), said installation (5) being characterized in that the solid/liquid separation filter (25) comprises at least: – an inlet (35), intended to be connected to the outlet of the bowl (7) of said WC (3), – a solid/liquid separation module (33), designed to separate solid materials from liquid materials, – a first outlet (45), intended to be connected to the inlet of an evacuation duct (30), – a second outlet (49), connected to said liquid recirculation circuit (27), said solid/liquid separation filter (25) being designed to route solid matter from said solid/liquid separation module (33) to said first outlet (45) and to convey the liquid materials from said solid/liquid separation module (33) to said second outlet (49), said installation (5) being further characterized in that said liquid recirculation circuit (27) comprises a filtration assembly (65) designed to render said liquid material potable during the passage of said liquid material in said filtration assembly (65 ). 2. Installation (5) according to claim 1, characterized in that the filtration assembly (65) of the liquid recirculation circuit (27) comprises a prefiltration device (67) and an ultrafiltration device (69), mounted in series. 3. Installation (5) according to one of claims 1 and 2, characterized in that the solid/liquid separation filter (25) comprises a casing (31) inside which is mounted the separation module (33). solid/liquid, and in that the solid/liquid separation module (33) is a rotating sieve (39) driven by an electric motor (40). 4. Installation (5) according to claim 3, characterized in that the separation filter (25) comprises a cleaning nozzle (51) of the rotary sieve (39), said installation (5) being further characterized in that it comprises a cleaning duct (53), connected at one of its ends to said cleaning nozzle (51), and intended to be connected at the other of its ends to a water inlet (17). 5. Installation (5) according to one of claims 1 to 4, characterized in that it comprises: – a reservoir (71) for storing liquid materials, supplied by the second outlet (49) of the solid/liquid separation filter (25), and - a hydraulic pump (77), arranged to extract the liquid materials contained in said reservoir (71) for storing liquid materials. 6. Installation (5) according to claims 2 and 5, characterized in that it comprises a tank emptying device (71) for storing liquid materials comprising: – a pre-filtration conduit (75) connecting the tank (71) for storing liquid materials to the pre-filtration device (67), – a drain pipe (83), connected on the one hand to said pre-filtration pipe (75) and intended to be connected on the other hand to the evacuation pipe (30), - a set of control of the direction of flow of liquid materials, arranged in the installation (5), to route the liquid materials from the tank (71) for storing liquid materials to the discharge conduit (30). 7. Installation (5) according to one of claims 2 to 6, characterized in that it comprises a backwashing device for the prefiltration device (67), said backwashing device further comprising : – one or said prefiltration conduit (75) to which the prefiltration device (67) is connected, – a washing pipe, connected on the one hand to said prefiltration device (67) and intended to be connected on the other hand to a water inlet (17), – one or said emptying pipe (83), connected on the one hand to said pre-filtration pipe (75) and intended to be connected on the other hand to the evacuation pipe (30), – one or said water flow direction control assembly, arranged in the installation (5) to route water from a water inlet (17) to the pre-filtration device (67), then from the pre-filtration device (67) to the evacuation conduit (30). 8. Installation (5) according to any one of claims 5 to 7, characterized in that the tank (71) for storing liquid materials comprises an upper cover (66) having an orifice (68) receiving the second outlet (49 ) of the solid/liquid separation filter (25). 9. Installation (5) according to any one of claims 2 to 8, characterized in that the solid/liquid separation filter (25) comprises two arms for fixing the prefiltration device (67) and the ultrafiltration device ( 69). 10. Sanitary assembly (1), characterized in that it comprises: – a toilet (3), comprising a bowl (7) and a flushing system (9), said flushing system (9) comprising a main tank (11), said main tank (11) being connected to a water inlet (17) and to said basin (7), and – an installation (5) for treating waste water from said toilet (3), obtained according to one of claims 1 to 9.