WO2017051124A1

WO2017051124A1 - Water treatment device, and craft comprising such a device

Info

Publication number: WO2017051124A1
Application number: PCT/FR2016/052405
Authority: WO
Inventors: Patrick TRESSIERES
Original assignee: Woter Sas
Priority date: 2015-09-22
Filing date: 2016-09-22
Publication date: 2017-03-30
Also published as: FR3041342B1; FR3041342A1; MA42944A; CA2998953A1; EP3353119A1

Abstract

The invention relates to a water treatment device (10) comprising a means (105) for organically and aerobically treating effluents, present in at least one vessel, and a treatment unit (110) that is remote from the organic treatment means and comprises: a pressurized air production means (165) for providing the pressurized air to the vessel; a means (115) for drawing in effluents present in the vessel, a means (120) for screening the drawn-in effluents; a screened effluent container (125); a peristaltic pump (130) for drawing the screened effluents in from the container; a horizontal tangential filtration means (135) intended for filtering the effluents from the peristaltic pump and comprising a filtered water outlet (140); and an active charcoal filter (145) for filtering the effluents from the tangential filtration means.

Description

WATER TREATMENT DEVICE AND BOAT COMPRISING SUCH

DEVICE

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a water treatment device and a boat comprising such a device. It applies, in particular, to the treatment of water in boats, rivers and sea, housing or industrial or agricultural sites.

STATE OF THE ART

The treatment of black and gray water produced on a boat and fairing water is an important ecological issue. If, in the past, gray and black waters were dumped into the waters of the sea or the river on which the boat sailed, new standards imposed retention on board these gray and black waters.

The discharges of black water participate in:

- development of algae resulting in the death of living organisms and

health risk related to the presence of bacteria, viruses, drug residues, parasites in the water for bathers (coast, lakes ...) but also for users of drinking water through the power grids.

In some current systems, the boat is equipped with blackwater recovery tanks (sewage) and emptied in dedicated port stations.

If there is not enough room, there are small tubs that sit in a sling around the existing toilet.

These systems have the disadvantage of not being able to be used in case of saturation. In addition, because of the emptying mechanism used, the boat can be limited in autonomy of movement.

In other current systems, the boat is equipped with a system of neutralization of black water by the implementation of dry toilets.

These systems also have the disadvantage of not being able to be used in a case of saturation. Indeed :

- emptying the contents in nature (waterway or bank) is forbidden,

- emptying the contents in the trash (even in a bag) is forbidden,

- The contents of dry toilets, too dense and dry, can not benefit from the black water pumping stations. In other current systems, the boat is equipped with means for ozonation or chlorination of effluents after dilution of these effluents. These effluents are then discharged into the natural environment.

In other current systems, the boat is equipped with a water electrolysis device to produce active chlorine mixed with the effluents subsequently released into the natural environment.

In the same way, fairing waters are currently discarded in the natural environment, this discharge leading to significant ecological consequences.

Thus, today there are no systems allowing autonomous treatment of black and gray water on board a boat and the treatment of fairing water.

OBJECT OF THE INVENTION

The present invention aims to remedy all or part of these disadvantages.

For this purpose, according to a first aspect, the present invention relates to a water treatment device which comprises:

means for aerobic biological treatment of effluents present in at least one tank,

a treatment unit, remote from the biological treatment means, which comprises:

a means for producing pressurized air to supply pressurized air to the tank,

a suction means for effluents present in the tank,

a means of screening the sucked effluents,

a reservoir of effluents that are notched,

a peristaltic pump for sucking effluents from the tank,

horizontal tangential filtration means, for filtering the effluents coming from the peristaltic pump, comprising an outlet for filtered water and

an active carbon filter for filtering the effluents from the tangential filtration means.

Thanks to these provisions, no rejection of suspended solids is to be realized. Thus, a boat equipped with such a device is autonomous in the treatment of water on board. In addition, this device does not have organic pollution. This device also has maximum prophylaxis, ie this device does not reject viruses and bacteria. This device also makes it possible to limit the discharges of nitrates and phosphates. In addition, this device can be adapted to the treatment rate of the boat. Finally, this device can be dispersed in a ship in order to present a dimensioning requiring no dedicated space in the boat, the device can be used to fill otherwise empty spaces.

The peristaltic pump produces a pulsating flow. This flux induces a permanent cyclic variation of the pressure exerted by the fluid on the membrane wall.

In fact, the particles are no longer "sustainably" plated against the membrane wall of the filtration means but, on the contrary, can not mask the membrane wall by accumulation because they are periodically detached by the cyclic pressure drop and caused by the next stream. This greatly limits surface clogging and cake formation.

On the other hand, the peristaltic pump does not contact the fluid with the mechanism of the pump, which facilitates maintenance of the device. Finally the peristaltic pump allows a reversal of direction of the fluid by reversing its direction of rotation without additional equipment such as motorized valves or solenoid valves mounted on bypass.

Backwashes occur by reversing the direction of rotation of the peristaltic pump. The already filtered water is in contact with the membranes that bathe in the filtered water tank.

Thus the distance to be covered by the water charged with particles becomes half a length of fiber and the declogging is more efficient. The fibers bathed in the already filtered water, all of the hollow fiber walls is cleaned almost homogeneously. This arrangement reduces the declogging difficulties observed on vertically mounted modules.

It is necessary to integrate the fact that gavage is preferentially done at very low pressure, less than 0.5 bar, and that backwash is preferably carried out by suction.

This device also makes it possible to carry out the treatment of water for private or collective dwellings.

In embodiments, the pump is configured to inject the effluents screened into the filtration means at a pressure of less than 1 bar.

These embodiments make it possible to limit the power consumption of the device.

In embodiments, the tangential filtration means comprises:

an upstream collector comprising, on a lower part, an inlet for untreated effluents,

a downstream collector comprising, on a lower part, a retentate outlet and a compartment, positioned between the upstream collector and the downstream connector, comprising at least one hollow fiber ultrafiltration module, this compartment comprising the filtered water outlet, positioned on an upper part of the filtering means with respect to the effluent inlet and the exit outlet for retentate.

These embodiments make it possible to implement a low transmembrane pressure of between 0.2 bar and 0.6 bar.

In embodiments, the device that is the subject of the present invention comprises: a manometer positioned upstream of the upstream collector and

an ultrafiltration module failure detector as a function of a pressure measured by the manometer.

These embodiments make it possible to detect a change in the inlet pressure drop of the ultrafiltration module and an ultrafiltration module operating fault.

In embodiments, the device according to the present invention comprises a manometer positioned at the outlet of the filtered waters (140), the ultrafiltration module failure detector determining a failure as a function of a measured pressure difference. between the manometers.

These embodiments make it possible to detect a pressure difference between the inlet and the outlet of the tangential filtration module in order to determine a failure of said module.

In embodiments, the device that is the subject of the present invention comprises a flowmeter positioned upstream of the active carbon filter, the detector determining a failure as a function of the flow rate measured by the flowmeter.

These embodiments make it possible to detect membrane rupture of the filtration module.

In embodiments, the device that is the subject of the present invention comprises means for communicating the detection of a detected fault.

In embodiments, the device which is the subject of the present invention comprises a discharged effluent discharge valve upstream of the ultrafiltration module.

These embodiments make it possible to limit as much as possible the clogging of the hollow fibers and to perform a cleaning of the device by backwashing, that is to say by the inverse circulation of filtered water in the various filtering devices of the device in order to supply the aggregates. of material to the tank in which the biological treatment takes place.

In embodiments, the tangential filtration means uses at least one electrically neutral hollow fiber filter.

These embodiments allow that the fibers do not polarize the waters, thus, no bond with dipolar molecules contained in the water is created. In embodiments, the screening means comprises a tangential screen having a filtration angle of between 40 ° and 50 °.

These embodiments make it possible to optimize the operation of the screening means.

In embodiments, the device that is the subject of the present invention comprises a pressurized air inlet in the tank, the air having a pressure of less than 1 bar.

These embodiments make it possible to supply the organisms carrying out the biological treatment with air so as to promote the development of these organisms.

In embodiments, the device that is the subject of the present invention comprises a bubble diffuser positioned at the bottom of the tank.

In embodiments, the device that is the subject of the present invention comprises a means for regulating the bubble diffuser configured to control the periodic operation of this bubble diffuser.

These embodiments make it possible to optimize the development of biological organisms.

The passage of bubbles through a phase contained in the tank makes it possible to stir the phase to promote the meeting between bacteria and molecules.

In embodiments, the device that is the subject of the present invention comprises at least two level probes positioned at different levels in the tank, the actuation of the suction means being carried out as a function of the level of effluents captured in the tank. .

These embodiments make it possible to actuate the suction means when the filling of the tank is high.

In embodiments, the effluent suction means is a peristaltic pump.

In embodiments, the device that is the subject of the present invention comprises means for controlling the suction means configured to transmit successively, and iteratively:

a suction control,

a resting command and

a backwash control.

These embodiments make it possible to put in operation and alternate maintenance. In embodiments, the device that is the subject of the present invention comprises a control device for the peristaltic pump for sucking off effluents that are configured to emit successively, and iteratively:

a suction control,

a first command for resting,

a backwash control and

a second quiescent command.

These embodiments make it possible to put in operation and alternate maintenance.

According to a second aspect, the present invention relates to a boat, which comprises a water treatment device object of the present invention.

The aims, advantages and particular characteristics of the boat object of the present invention being similar to those of the device object of the present invention, they are not recalled here.

In embodiments:

the means for producing air under pressure,

the suction means of effluents present in the tank,

the means for screening the sucked effluents,

the effluent tank screened,

the peristaltic pump for sucking effluents from the tank,

the horizontal tangential filtration means, for filtering the effluents from the peristaltic pump, comprising an outlet for filtered water and

the activated carbon filter for filtering the effluents from the tangential filtration means

are scattered in the boat.

These embodiments make it possible to limit the space used by the device to the otherwise unusable or unused spaces of the boat. This advantage is particularly marked in the case of the installation of the device in a pre-existing boat.

BRIEF DESCRIPTION OF THE FIGURES

Other advantages, aims and particular features of the invention will emerge from the following nonlimiting description of at least one particular embodiment of the device and the boat objects of the present invention, with reference to the accompanying drawings, in which: which : FIG. 1 represents, schematically, a first particular embodiment of the device that is the subject of the present invention,

FIG. 2 represents, schematically, a second particular embodiment of the device that is the subject of the present invention,

FIG. 3 represents, schematically, a first particular embodiment of the craft object of the present invention and

Figure 4 shows schematically a third particular embodiment of the device object of the present invention.

DESCRIPTION OF EXAMPLES OF EMBODIMENT OF THE INVENTION

This description is given in a nonlimiting manner, each feature of an embodiment being able to be combined with any other feature of any other embodiment in an advantageous manner. Furthermore, each parameter of an exemplary embodiment can be implemented independently of other parameters of said exemplary embodiment.

It is already noted that the figures are not to scale.

It is noted that the pressure values expressed hereafter are relative pressure values with respect to the value of the atmospheric pressure. Thus, a so-called "2 bar" pressure corresponds to an absolute pressure determined by the sum of 2 bar and atmospheric pressure instead of the device. This atmospheric pressure is close to 1 bar.

FIG. 1, which is not to scale, shows a schematic view of an embodiment of the device 10 which is the subject of the present invention. This water treatment device 10 comprises:

means 105 for aerobic biological treatment of effluents present in at least one tank,

a treatment unit 1 10, remote from the biological treatment means, which comprises:

a means 165 for producing air under pressure to supply the pressurized air to the tank,

means 1 for suctioning effluents present in the vessel,

a means 120 for screening the sucked effluents,

a reservoir 125 of effluents,

a peristaltic pump 130 for sucking effluents from the tank,

a means 135 for horizontal tangential filtration, for filtering the effluents coming from the peristaltic pump, comprising an outlet 140 for filtered water and an active carbon filter 145 for filtering the effluents from the tangential filtration means.

Each tank is, for example, a tank for accumulating water in a boat. This tank may be pre-existing in the boat before installation of the device 10. Conversely, the device 10 may include such a tank for installation in the boat.

In variants, the device 10 comprises at least two tanks, each tank implementing a processing means 105.

The vessel or tanks are preferably positioned so as to have an axis of symmetry coincident with the axis of symmetry of the hull of the boat.

The whole of the tanks is dimensioned according to the daily needs of treatment.

Each tank has a plate allowing the connection:

an effluent suction duct,

a return flow of sucked effluents,

- a vent,

- probes, 180, 185, level and / or

- An inlet for pressurized air produced by the means 165 for producing air under pressure.

In variants, each tank comprises a horizontal strainer upstream of the effluent suction duct. Preferably, each tank comprises a horizontal double strainer upstream of the suction duct.

The treatment means 105 is, for example, a seeding of microorganisms, such as bacteria, adapted to freshwater or brackish or salty water, that is to say having about 40 grams of sodium chloride (NaCl) per liter of water. In this way, the tank acts as a bioreactor for an aerobic reaction in situ.

In preferred embodiments, as shown in Figure 1, the device 10 comprises a bubble diffuser 170 positioned at the bottom of the tank. Preferably, the device 10 comprises a means 165 for producing air under pressure and a means 175 for regulating the pressurized air production means 165 and therefore the configured bubble diffuser 170, to control the periodic operation of this device. means for producing air 165 and bubble diffuser 170.

The bubble diffuser 170 is, for example, a microporous tube having a pressure of the order of 0.3 bar to deliver a large amount of microbubbles. The regulating means 175 is, for example, an electronic control circuit configured to issue commands for starting and stopping the bubble diffuser 170. In variants, the regulating means 175 is integrated into a control system the device 10 controlling the joint or independent operation of each means of the device 10.

The use of a bubble diffuser 170 makes it possible to produce a sequential bioreactor, ie a bioreactor having aeration periods and nonaeration periods. The alternation between aeration and nonaeration allows a complete degradation of the organic matter in the tank and ensures the nitrification-denitrification of this material without release of odors.

The microorganisms used are periodically renewed by the manual or automatic insertion of these microorganisms into the tank. This renewal is ensured, for example, every fortnight.

The inlet of pressurized air into the tank is connected, for example, to the pressurized air production means 165. This compressed air preferably has a pressure of less than 1 bar.

This inlet of pressurized air is, for example, formed by a set of microporous tubes with narrow fields or by a set of stones of aeration of basins with low pressure.

Preferably, the device 10 comprises at least two probes, 180 and 185, of levels, positioned at different levels in the tank, the actuation of the suction means 1 being carried out as a function of the level of effluents captured in the tank .

A probe 180 is positioned at higher altitude than the other probe 185. When the level in the tank 105 reaches the upper probe 180, the water is no longer accumulated in the tank 105.

When the level in the tank 105 is greater than the lower probe 185, the suction means 1 is activated while when the level in the tank 105 is lower than the lower probe 185, the suction means 1 is deactivated. .

In variants, when the level in the tank 105 is greater than the upper probe 180, an audible and / or light alarm signal is emitted near a unit supplying the effluent tank. In the context of a boat, for example, a sound and / or light signal is emitted in a sanitary room on board the boat, or any other means of warning the user.

The treatment unit 1 10 is, for example, contained in a single casing, in two stages or dispersed in the boat and connected by a set of internal tubes. The treatment unit 1 10 is connected to each tank by a set of air ducts, suction, back flow of sucked effluents and probe cables, 180 and 185, levels.

The suction means 1 15 is, for example, a peristaltic pump, nicknamed "circulation pump". This peristaltic pump is associated with a solenoid valve, or a motorized valve, or any other means for opening or closing the circulation, per tank of the device 10. This pump supplies effluents by means of screening 120.

The suction means 1 sucks successively or simultaneously effluents in a plurality of tanks if the device 10 comprises a plurality of tanks.

In preferred embodiments, as shown in FIG. 1, the device 10 comprises means 190 for controlling the suction means 1 configured to transmit successively, and iteratively:

a suction control,

a rest command,

- a backwash control and

a quiescent command.

This control means 190 is actuated, for example, when a low level sensor of the tank detects the presence of effluents in the tank. This control means 190 controls the opening of a solenoid valve, or a motorized valve, connecting the tank to the suction means 1 15. After a determined period of time, such as eight seconds, for example, the suction means 1 is activated. . The suction means 1 sucks for a given time, such as eight minutes for example, the contents of the tank. The rest is then controlled for a fixed period, such as ten seconds for example. The duration of the quiescence corresponds to a duration of operation or stop of the suction means 1 15 programmed. This duration generally corresponds to a ramp for starting or stopping. Finally, the backwash control is configured to allow backwashing of the suction means 1 for one minute to prevent clogging of the strainers.

The control means 190 is inhibited when a low level probe (185) does not detect the presence of effluents in the tank.

This control means 190 is, for example, a programmable electronic controller.

This peristaltic pump has, for example, a power of 100W.

The screening means 120 is, for example, an assembly formed by: a polyvinyl chloride tube, abbreviated "PVC" having, for example, an outer diameter of ninety millimeters, closed by two pierced plugs allowing the circulation of the sucked effluents,

a cylindrical sieve 160 made of stainless steel, or polymer, of sixty millimeters in diameter, and preferably coaxial with the PVC tube, having asperities of dimensions of the order of one hundred and fifty micrometers,

an inlet line of raw effluents from the suction means 1 15,

a drained water outlet line and

a circulation exit line including a venting tee.

The circulating water is returned by gravity or any other means in at least one tank 105 via a distributor.

The screening means 120 has a filtration angle between 40 ° and 50 °. Preferably, the screening device 120 and its tangential screen has a filtration angle of 45 °.

The outlet of the water removed is connected to the tank 125. This reservoir 125 is, for example, a polycarbonate or polyethylene tank. Preferably, this tank has at least one transparent wall.

In preferred embodiments, this tank 125 comprises a low level regulator and a high level regulator.

When the high level is reached, the suction means 1 is stopped. When the level in the reservoir 125 is lower than the low level, the peristaltic pump 130 is stopped. When the level in the reservoir 125 is higher than the low level, the peristaltic pump 130 is turned on.

This tank 125 may be formed by at least one sealed compartment of the housing, if the processing unit 1 10 is contained in a housing. Preferably, this reservoir 125 comprises a drain to a tank of the device 10.

The peristaltic pump 130, nicknamed "booster pump", is connected to the reservoir 125 on the one hand and the filtration means 135 on the other. This booster pump further comprises a bypass comprising a normally open solenoid valve and a normally closed solenoid valve. Alternatively, this pair of solenoid valves is replaced by a motorized 3-way valve.

This peristaltic pump 130 has, for example, a power of 100W.

This peristaltic pump 130 is, for example, equipped with a brushless motor.

In preferred embodiments, the pump 130 is configured to inject the effluents screened into the filtration means at a pressure of less than 1 bar. In preferred embodiments, the device 10 comprises a means 195 for controlling the peristaltic pump 130 for sucking off effluents that are configured to emit successively, and iteratively:

a suction control,

a first command for resting,

a backwash control and

a second quiescent command.

This control means 195 is, for example, a programmable electronic controller.

The operating cycle of the control means 195 is, for example:

operating the peristaltic pump 130 after a delay of fifteen seconds once a low level regulator switch of the tank 125 is closed, the pump 130 operating for ten minutes,

- Resting pump 130 for fifteen seconds,

- Reversal of the direction of rotation for two minutes of the pump 130 to carry out backwashing, this flow being sent into at least one tank via the distributor,

- Resting the pump 130 for fifteen seconds.

In variants, the device 10 comprises a three-way solenoid valve 305 between the outlet of the reservoir 125 for effluents that are screened and the peristaltic pump 130. In variants, the solenoid valve 305 is replaced by a motorized valve. When the direction of rotation of the pump 130 is reversed, that is to say during a backwashing of the device 10, the backwash flow does not pass through the tank 125, this flow being directly redirected to the tank 105. the direction of rotation corresponds to the suction of the effluents screened inside the tank 125, the effluents thus sucked go from the tank 125 to the peristaltic pump 130.

The filtration means 135 implements, for example, a horizontal tangential filtration mechanism operating at a transmembrane pressure less than one bar. Preferably, the operating pressure is between 0.2 and 0.6 bar.

The filtration means 135 comprises, preferably:

an upstream collector 205 comprising, on a lower part, an inlet 210 for unmarked effluents,

a downstream collector 215 comprising, on a lower part, an outlet 220 for retentate, a compartment 225, positioned between the upstream collector and the downstream connector, comprising at least one hollow fiber ultrafiltration module 230, this compartment comprising the outlet for Filtered water, positioned on an upper part filtration means with respect to the effluent inlet and the exit outlet for retentate.

The upstream manifold 205 is connected, for example, to the booster pump via the inlet 210 for effluents that have been screened.

The downstream manifold 215 is connected, for example, to a treatment tank via outlet 220 for retentation.

Each manifold, 205 and 215, has, for example, a cylinder shape of flat revolution or thick and hollow disc.

The compartment 225 is, for example, a volume delimited by the collectors 205 and 215. This compartment 225 is traversed by each ultrafiltration module 230, each ultrafiltration module 230 connecting the downstream collector 205 to the upstream collector 215. In preferred embodiments, the device 10 comprises twelve ultrafiltration modules 230 whose junctions with the downstream collector 215 and the upstream collector 205 are organized in concentric circles on said collectors 205 and 215.

Thus, the flow arrives in the upstream manifold 205 in the lower part, then flows in the hollow fibers and fills the downstream manifold 215. Next, the flow joins the compartment 225 via a solenoid valve or a two-way motor valve via the distributor. The position of the inlet 210 and the outlet 220 avoids any risk of accumulation of particles in the collectors 205 and 215, and therefore in the hollow fibers.

Each ultrafiltration module 230 has, for example, a cutoff threshold at 19 nanometers. Each ultrafiltration module 230 is preferably a membrane filter. The flux passing through each module 230 is tangential and oriented from the inside to the outside of the membrane wall.

This filtration means 135 preferably comprises a discharge valve 310 discharged effluents upstream of the ultrafiltration module. This valve 310 is calibrated, for example, at 0.6 bar.

In preferred variants, a line connects the inlet 210 and the outlet 220 to form a junction between the two collectors, 205 and 215. This line comprises a solenoid valve, or a motorized valve, whose opening, at the time of production a backwash of the device, allows a complete cleaning of the collectors, 205 and 215.

In preferred embodiments, the filtration means 135 comprises an upstream manifold isolation valve 205 and an downstream manifold isolation valve 215.

The compartment 225 allows the collection of filtered water, the modules 230 can be immersed in the filtered water due to the positioning in the upper part of the outlet 140 for filtered water. This filtered water is used during the realization of backwashes to clean the hollow fibers of the ultrafiltration modules 230. Each ultrafiltration module 230 is separated from the collectors 205 and 215 respectively by a perforated PMMA (methyl methacrylate) plate. Each perforation allows the attachment of an ultrafiltration module 230. This attachment is sealed by the implementation of a flexible polymer seal.

Each ultrafiltration module 230 is attached to the collectors 205 and 215 by the implementation of two flanges connected by at least one threaded rod passing through said module 230. Each flange has, for example, a circle shape traversed by two strips. diametrical and these bands being preferably perpendicular to each other. A first flange is positioned on the side of the upstream manifold 205, and another flange is positioned on the side of the downstream manifold 215. The upstream manifold 205 is integral with a plate which carries the modules 230. Thus, the dismantling of the downstream manifold 215 allows quick access to modules 230.

Preferably, at least one module 230 is an electrically neutral hollow fiber filter.

Preferentially, the permeability of the fibers used in each ultrafiltration module is of the order of 800 L / m ² / bar. The active carbon filter 145 is, for example, contained in a container made of polycarbonate or polyethylene, completely sealed. This container has a low point of arrival of filtered water and a high point of exit of treated water. This filter 145 operates in a gravitational manner.

Preferably, the inlet and the outlet of the filter 145 are protected by a large-volume strainer consisting of a perforated tube covered with a polymer sieve whose asperities have a sizing of about three hundred micrometers.

In variants, the device 10 comprises a direct line between the downstream collector 215 and the upstream collector 205. In this way, during backwashing, the aspiration of the particles into these collectors, 205 and 215, is facilitated.

In embodiments, the device 10 comprises:

a manometer 245 positioned upstream of the upstream manifold 205 and

an ultrafiltration module failure detector 250 as a function of a pressure measured by the manometer.

The detector 250 is, for example, an electronic circuit configured to compare the pressure measured by the pressure gauge 245 with a predetermined pressure value or with a pressure value previously measured by the pressure gauge 245.

In embodiments, the device 10 comprises a manometer 235 positioned downstream of the collector 225 on the filtered water outlet, the ultrafiltration module failure detector 250 determining a failure as a function of a pressure difference measured between the manometers, 235 and 245. In embodiments, the device 10 comprises a flow meter 330 positioned upstream of the active carbon filter, the detector 250 determining a failure as a function of the flow rate measured by the flow meter 330.

In embodiments, the device 10 includes means 255 for communicating the detection of a detected fault.

This communication means 255 is, for example, an antenna configured to transmit a signal representative of the detection of a failure on a data network. This data network is, for example, a mobile data network of GSM type (for "Special Mobile Group").

In variants, this communication means 255 emits a signal representative of at least one pressure measured by a pressure gauge, 235 and / or 245, or a flow rate measured by the flow meter 330.

In preferred embodiments, as shown in FIG. 1, the device 10 comprises:

a reservoir 150 of water, connected to the output of the activated carbon filter.

The water reserve 150 is, for example, a reservoir distinct from the internal volume of the compartment 225. In variants, this water reserve 150 is formed by the internal volume of the compartment 225.

In variants, the water reserve 150 has a water outlet (not referenced) towards the natural environment around the device 10.

In variants, the water reserve 150 comprises a water outlet connected to an ultraviolet filter 315 and a booster 320, the water thus output being moved to an outlet for possible reuse.

In variants, the water reservoir 150 has an inlet 325 for complementary water coming from a water distribution network. The supply of water through the inlet 325 may be conditioned to the signaling of the absence of water by a probe (not shown) positioned in the reserve 150, preferably in the lower part.

These embodiments are implemented, for example, on fairing sites, industrial sites or agricultural sites.

In preferred embodiments, the device 10 comprises an electrical box for protection, management and regulation which comprises:

- protection organs for persons and electrical equipment,

- load relays,

- each PLC and

- Electronic control plates for peristaltic pump motors. Thus, as understood, the bioreactor, formed by the tanks and the biological treatment means, is coupled to the self-maintained screening device 120 and then by means of ultrafiltration 135 which does not allow bacteria, viruses or materials to pass through. in suspension. Thus, the water treated by the device 10 are sterile at the membrane outlet and present no danger to the environment or to the human being. The treated water complies with the so-called "improved bathing water" quality, that is to say not containing microorganisms.

All the water remaining upstream of the filter membrane is progressively degraded by the biological treatment means 105.

The filters of the device 10 are self-maintained by the action of programmed backwashes, these backwashes being provided by the reverse circulation of the water treated by the device 10.

The device 10 can be implemented in the context of a home or for any system requiring the recovery of filtered water from water unfit for consumption or discharge into the natural environment. Alternatively, the device 10 can be implemented in the context of an industrial, agricultural or commercial operation in order to treat effluents characteristic of these farms.

Figure 3 schematically shows a particular embodiment of the boat 30 object of the present invention. This boat 30 comprises a device 10 for treating gray and black water as described with reference to FIG.

In this boat 30:

the means 165 for producing air under pressure,

the suction means 1 of effluents present in the tank,

the means 120 for screening the sucked effluents,

the reservoir 125 of effluents,

the peristaltic pump 130 for sucking effluents from the tank, the horizontal filtration means 135, for filtering the effluents from the peristaltic pump, comprising an outlet for filtered water and

the activated carbon filter 145 for filtering the effluents from the tangential filtration means

are scattered in the boat 30.

As understood by reading this description, the device 10 can be either dispersed in a boat, or on the contrary integrated in a container and have only inputs and outputs for attachment to an existing system. This container may have, for example, a length of twenty feet or forty feet in the treatment applications of fairing effluent, industrial or agricultural. Alternatively, the device 10 can be positioned on a pallet (translated as "skid" in English) so as to be made mobile. This alternative is particularly intended to be implemented in the context of housing.

FIG. 4 diagrammatically shows a particular embodiment of the device 40 which is the subject of the present invention. This embodiment corresponds to the implementation of the device 10 in a fairing site.

There is, in particular, at least one gutter 415 positioned at the lowest point of the fairing area, each gutter 415 feeding a station 420 for the recovery of effluents. This lifting station 420 comprises, for example, two pumps for moving the effluents to a prefilter 410 and then to a separation tank 405 and finally to the biological treatment means 105 as described with reference to FIG.

It is further observed that an outlet for backwashing water of the tangential filtration means 135 is poured into at least one channel 415. Likewise, the valve 310 causes the discharge of untreated water or backwashing water. in at least one gutter 415. Similarly, the solenoid valve 305, or the motorized valve, causes the discharge of untreated water or backwash water in at least one gutter 415.

It will also be noted that the circulation exit line of the screening means 120 is connected to the separation tank 405.

In variants not shown, the device 40 comprises a solenoid valve, or a motorized valve, for emptying the tank in at least one channel 415.

Claims

1. Device (10) for treating water, characterized in that it comprises:

means (105) for aerobic biological treatment of effluents present in at least one tank,

a treatment unit (1 10), remote from the biological treatment means, which comprises:

means (165) for producing air under pressure to supply the pressurized air to the tank,

means (1 15) for suctioning effluents present in the tank,

means (120) for screening the sucked effluents,

a reservoir (125) of effluents that are exposed,

a peristaltic pump (130) for sucking effluents from the tank,

horizontal tangential filtration means (135) for filtering the effluents from the peristaltic pump, comprising an outlet (140) for filtered water and

an active carbon filter (145) for filtering the effluents from the tangential filtration means.

2. Device (10) according to claim 1, wherein the pump is configured to inject the effluents screened in the filtration means at a pressure less than 1 bar.

3. Device (10) according to one of claims 1 or 2, wherein the means (135) tangential filtration comprises:

an upstream collector (205) comprising, on a lower part, an inlet (210) for unmarked effluents,

a downstream collector (215) comprising, on a lower part, an outlet (220) for retentating and

a compartment (225), positioned between the upstream collector and the downstream connector, comprising at least one hollow fiber ultrafiltration module (230), this compartment comprising the filtered water outlet, positioned on an upper part of the filtering means by report to the effluent inlet and outlet for retentate.

4. Device (10) according to claim 3, which comprises:

a manometer (245) positioned upstream of the upstream manifold (205) and an ultrafiltration module failure detector (250) as a function of a pressure measured by the manometer.

Device (10) according to claim 4, which comprises a pressure gauge (235) positioned downstream of the compartment (225), the ultrafiltration module failure detector (250) determining a failure as a function of a pressure difference measured between the manometers.

6. Device (10) according to one of claims 1 to 5, which comprises a flowmeter (330) positioned upstream of the active carbon filter, the detector (250) determining a failure as a function of the flow rate measured by the flow meter.

7. Device (10) according to one of claims 5 or 6, which comprises means (255) for communicating the detection of a detected failure.

8. Device (10) according to one of claims 1 to 7, which comprises a valve (310) discharging effluent screened upstream of the ultrafiltration module.

9. Device (10) according to one of claims 1 to 8, wherein the means (135) tangential filtration implements at least one electrically neutral hollow fiber filter.

10. Device (10) according to one of claims 1 to 9, wherein the means (120) for screening comprises a sieve (160) tangential having a filtration angle of between 40 ° and 50 °.

1 1. Device (10) according to one of claims 1 to 10, wherein the air produced by the means (165) for producing air under pressure has a pressure less than 1 bar.

12. Device (10) according to one of claims 1 to 1 1, which comprises a bubble diffuser (170) positioned at the bottom of the tank.

13. Device (10) according to claim 12, which comprises means (175) for regulating the bubble diffuser (170) configured to control the periodic operation of this bubble diffuser.

14. Device (10) according to one of claims 1 to 13, which comprises at least two probes (180, 185) of levels positioned at different levels in the tank, the actuation of the means (1 15) suction being carried out according to the level of effluent captured in the tank.

15. Device (10) according to one of claims 1 to 14, wherein the means (1 15) for suction effluent is a peristaltic pump.

16. Device (10) according to one of claims 1 to 15, which comprises means (190) for controlling the suction means (1 15) configured to transmit successively, and iteratively:

a suction control,

a rest command,

a backwash control and

a quiescent command.

17. Device (10) according to one of claims 1 to 16, which comprises means (195) for controlling the peristaltic pump (130) for sucking effluents screened configured to emit successively, and iteratively:

a suction control,

a first command for resting,

a backwash control and

a second quiescent command.

18. Craft (30), characterized in that it comprises a device (10) for treating water according to one of claims 1 to 17.

19. Craft (30) according to claim 18, wherein:

the means (165) for producing air under pressure,

the means (1 15) for suctioning effluents present in the tank,

the means (120) for screening the sucked effluents,

the reservoir (125) of effluents that are exposed,

the peristaltic pump (130) for sucking effluents from the tank, the horizontal tangential filtration means (135) for filtering the effluents from the peristaltic pump, comprising an outlet for filtered water and

the activated carbon filter (145) for filtering the effluents from the tangential filtration means

are scattered in the boat.