Classifications

• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/28—Treatment of water, waste water, or sewage by sorption
  • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/28—Treatment of water, waste water, or sewage by sorption
  • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/30—Treatment of water, waste water, or sewage by irradiation
  • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
  • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
  • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/005—Processes using a programmable logic controller [PLC]
  • C02F2209/008—Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/03—Pressure
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/05—Conductivity or salinity
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/11—Turbidity
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/40—Liquid flow rate
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/42—Liquid level
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2301/00—General aspects of water treatment
  • C02F2301/04—Flow arrangements
  • C02F2301/046—Recirculation with an external loop
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2303/00—Specific treatment goals
  • C02F2303/04—Disinfection
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2303/00—Specific treatment goals
  • C02F2303/16—Regeneration of sorbents, filters
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2307/00—Location of water treatment or water treatment device
  • C02F2307/06—Mounted on or being part of a faucet, shower handle or showerhead
• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
  • E03B1/00—Methods or layout of installations for water supply
  • E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
  • E03B1/041—Greywater supply systems
  • E03B2001/045—Greywater supply systems using household water

Definitions

• the present invention relates to the technical field of gray water treatment devices for domestic use and in particular relates to a water recycling device suitable for a solar and autonomous beach shower.
• Optimizing water consumption, particularly shower water, is possible thanks to gray water recycling systems.
• One solution used is a closed or semi-closed loop water recycling system including filters to clean gray water and sensors to measure the quality of the filtered water. A certain amount of clean water must be injected into the system regularly to clean the circuit or clean the filters.
• the device described in document WO2019116018 comprises a waste water tank, a waste water recycling circuit provided with a pump and a control unit. Waste water is pumped directly into the tank, filtered and reinjected into the shower supply circuit.
• document FR 2 974 285 describes a shower comprising a first tank for receiving gray water. At the outlet of this tank and thanks to a first pump, the water is sent to a second tank where it undergoes a first treatment, then passes through a filter and returns either to the second tank or to another filter. This treatment filters gray water which is then stored in a tank as “clean water” which is used to supply the shower.
• All of these systems provide a tank to collect gray water before filtering it.
• the water from the shower tray of the device described in document FR 2 974 285 is collected at the bottom of the tray before being sent to a tank.
• the disadvantage of such a system is that the shower water is mixed before arriving in the tank, which also mixes the materials to be removed.
• part of the water leaving the tank is filtered and leaves in a first fluid loop which filters the water. At the exit of this first fluid loop, the water leaves in a second fluid loop or is redirected into the tank.
• the two fluid loops in series limit the flow of water leaving the tank, which is why this water must be stored to be able to provide the quantity of water necessary when using the shower.
• the aim of the invention is to overcome these drawbacks by providing a semi-closed circuit water recycling device capable of providing a maximum quantity of recycled water and a sufficient flow rate to supply a water outlet. continuously.
• Another aim of the invention is to provide a shower equipped with a recycling device capable of providing a maximum quantity of recycled water and a sufficient flow rate to supply the shower.
• Another aim is to provide a method of operating a recycling device.
• the object of the invention is therefore a water recycling device comprising at least one water outlet, a first tank serving to collect the water distributed by the water outlet, a first fluid circuit comprising a pump. circulation makes it possible to circulate part of the water from the first tank through filtration means to the water outlet in order to supply recycled water to the water outlet.
• the device comprises a second fluidic circuit independent of the first circuit, equipped with a circulation pump and means for filtering the water from the first tank, the inlet and the outlet of the second fluidic circuit being positioned on opposite side walls of the tank and the inlet of the first fluidic circuit being positioned on the one hand on the same side as the outlet of the second fluidic circuit and on the other hand deeper in the tank than the inlet and outlet of the second fluidic circuit so that the surface water of the tank is entrained in the second fluidic circuit before being entrained in the first fluidic circuit.
• Another object of the invention is the use of a recycling device as explained above for a shower.
• the first fluidic circuit comprises at least two pressure sensors measuring a pressure P1 and P2 respectively upstream and downstream of the membrane filters, the sensors transmitting their data continuously to the control module which controls, when the difference between P1 and P2 is greater than 1.5 bars or when the water outlet is supplied with recycled water for a period greater than a predetermined duration: - the opening of the second fluidic line in order to carry out backwashing of the one or more ultrafiltration membrane filters and the ultraviolet filter with water from the second tank by opening the bypass solenoid valve and closing the solenoid valve located between the membrane filter(s) and the ultraviolet filter , the water from the backwash being evacuated, - the opening of the first fluidic pipe line, in order to supply water to the second tank in place of the recycled water, the water outlet during the backwash washing the membrane filters, - closing the third fluidic line and closing the solenoid valve located downstream of the pump of the first fluidic circuit,
• the first fluidic circuit comprises at least one flow and conductivity sensor and a multi-parameter probe measuring at least turbidity and color, the sensors and the probe transmitting their data continuously to the control module which, depending on the information from flow rate, conductivity and turbidity control of: - continuously measure the flow rate and conductivity of the water circulating in the first fluid circuit using a measurement sensor located downstream of the ultraviolet filter, - if the measured flow rate is greater or equal to 4 liters per minute increment the measured conductivity value to a conductivity reference value, - compare the continuously measured conductivity value with the reference value as long as the measured flow rate is greater than or equal to 4 liters per minute, - update the conductivity reference value with the measured conductivity value as soon as the measured flow rate is less than 4 liters per minute,
• the control module commands simultaneously: - l opening the third fluidic line to dilute the water in the tank with approximately 15% of water from the second tank for one minute, - opening the first fluidic line in order to supply water to the tank the second tank in place of the recycled water, the water outlet during dilution, - closing the second fluid line (32), - closing the solenoid valve located downstream of the ultra-filter violet, - and the opening of the solenoid valve located downstream of the ultraviolet filter and at the entrance to the evacuation line of the first fluidic circuit,
• the control module commands for 4 minutes: - the opening of the first fluidic line in order to supply in water from the second tank instead of the recycled water, the water outlets during dilution, the closing of the second and third fluidic lines and the opening of the solenoid valve located at the inlet of the line evacuation of the first tank, then the control module controls the opening of the third fluidic line to fill the first tank with water from the second tank until the predetermined high filling level of said first tank is reached.
• upstream and downstream of an element generally refer to another element located before or after the first element in the direction of flow.
• the water recycling device makes it possible to supply water to at least one water outlet 110, 120 such as a shower head, a rinsing fountain or a faucet.
• a water outlet 110, 120 such as a shower head, a rinsing fountain or a faucet.
• the recycling device is integrated into a beach shower 70 mainly comprising a streamlined and hollow column housing two compartments 71 and 72 and a semi-buried base 75 on which is fixed the column.
• the upper compartment 71 conceals the electrical and electronic part of the device while the lower compartment 72 and the base conceal the hydraulic part.
• the box is topped with solar panels 77.
• a button 73 controls the water supply to the water outlet 110, 120 when activated.
• the water recycling device mainly comprises a set of pipes, inlets and outlets, a first tank 100 containing water considered as gray water and a second tank 200 containing water coming from the water network. external water.
• the assembly can be divided into three fluidic circuits 10, 20 and 30. Part of the circulation of water takes place in contact with the atmosphere, as such, fluid circuits or fluid loops can be described as open circuits.
• the first fluidic circuit 10 or treatment and distribution circuit starts from the first tank and ends at the water outlet while the second fluidic circuit 20 starts from the first tank and returns to the first tank.
• the third fluidic circuit 30 starts from the second tank and comprises several open or closed fluidic conduit lines depending on the operating mode of the device.
• a first line 31 brings the water towards the water outlet
• a second line 32 brings the water counter-currently into the membrane filters 13 for backwashing then towards a diversion pipe provided in the first fluidic circuit 10
• a third line 33 goes to the first tank 100 to supply it with water from the second tank 200.
• the device according to the invention also comprises a set of solenoid valves 81 to 88, and 91 to 94 whose openings and closings are controlled by a control module 45. All of the fluid lines of the first and third fluid circuits described previously being opened and closed thanks to the set of solenoid valves 81 to 88.
• the solenoid valves 91, 92 and 93 respectively allow the opening and closing of an evacuation pipe of the first fluidic circuit, of the second tank 200 and of the first tank 100.
• the solenoid valve 94 allows the opening and closing of a pipe for redirecting the recycled water directly into the tank 100.
• the device according to the invention comprises several sensors adapted to measure at least one physical quantity and transmitting the measured data to the control module which delivers control signals to the device and allows the implementation of the operating method of the recycling device according to programmed and automatic operating modes.
• the first tank 100 of the device according to the invention collects gray water coming from at least the water outlet 110.
• the tank 100 is a tank which must contain a certain volume of water at all times for the device of the invention to operate correctly. This volume is between 50 l and 100 l for two water outlets 110 and 120.
• the tank 100 can be filled from above. In fact, the tank 100 is located below the water outlet 110 and has an opening on the top so that it plays the role of a receiving tank or receiver of the water coming from the water outlet.
• the water outlet 110 or 120 is a water use device such as a faucet, a shower head or shower head or the spout of a fountain.
• the fluid circuits of the device according to the invention are schematized on the .
• the second fluid circuit 20 circulates the gray water sucked from the first tank 100 through at least one microporous media filter before being reinjected into the tank.
• a pumping means such as a pump 28 allows the circulation of gray water in the circuit 20 from the inlet 21 located in the tank towards a first filter 24, then towards a second filter 26, before returning to the tank through a outlet 23.
• the term “gray water” is used to designate the water contained in the first tank and in the first fluidic circuit 20 even if part of this water is continuously filtered in the second circuit fluidics.
• the inlet 21 and the outlet 23 of the fluidic circuit 20 are positioned on opposite side walls of the first tank 100, preferably at the same height and therefore at the same level in the tank and close to the surface 126 of the water in the tank. tank 100.
• the inlet 21 and the outlet 23 being face to face, the water injected into the first tank 100 via the outlet 23 pushes the suspended matter and the surface water towards the inlet 21.
• the circulation of water in the fluidic circuit 20 induces a surface current in the volume of gray water of the first tank 100 and thus allows the filtration in priority of the surface water of the tank, therefore those which contain moss, hair, sand, oils, etc., the aim being to force all these materials to pass into the second fluidic circuit 20 via inlet 21 before passing into the first fluidic circuit 10 via inlet 29.
• Inlet 29 is preferably located towards the bottom and deeper in the first tank and less close to the surface than outlet 23 and inlet 21, the height difference between the level of inlet 29 and the level of outlet 23 being between 5 cm and 20 cm and preferably equal to 15 cm. There is the same difference in height between the level of inlet 21 and the level of inlet 29, the inlet 21 and the outlet 23 of the fluidic circuit 20 being located at the same level.
• the tank 100 also includes an evacuation outlet 27 located at the lowest point of the tank, and an overflow, not shown on the , to prevent overflowing of the tank 100.
• the evacuation outlet 27 conducts the water via a fluidic evacuation pipe line which, when open, directs the water towards the evacuation 130 or the sewers. This line is equipped with a solenoid valve 93 and a manual valve 62 open by default. Emptying is thus carried out by gravity.
• the circulation of water in the second fluid circuit 20 also causes mixing of the water contained in the first tank, avoids stagnation and contributes to dissolving water. oxygen in gray water.
• a baffle 127 can be installed in the first tank 100 consisting of a plate located above the outlet 23 of the second fluidic circuit 20.
• the baffle 127 being directed inclined towards the center and the bottom of the first tank promotes decantation, the angle and length of the baffle 127 illustrated on the not being restrictive.
• the baffle 127 serves to further prevent water 125 loaded with hair, sand and oils from passing directly into the first fluidic circuit via inlet 29 before passing into the second fluidic circuit.
• the tank 100 has an open part on the top and has on its upper face a draining layer 121 such as a resin and aggregate coating and placed between the tank 100 and the water outlets 110 and 120 preferably close to the surface of water in the tank when the tank is full.
• the draining layer is placed horizontally on the upper part of the tank 100 and under the outlets 110 and 120, vertically therefrom, so that the water from the outlets 110 and 120 falls directly onto the draining layer then into the tank.
• the draining layer has the advantage of having an extended filtration surface corresponding to the surface of the upper side of the tank 100.
• the draining layer corresponds to the floor of the shower
• the tank is topped with a grid adapted to support the draining layer 121 and the weight of the person taking a shower and to let the water pass.
• Water outlets 110 and 120 are placed at a distance above the draining layer of at least 1.80 m.
• This draining layer has the advantage of filtering the coarsest materials such as hair and sand but also slows down the speed of the water arriving in the tank and widens the incoming flow.
• the draining layer being placed on the tank 100 and under the water outlets 110 and 120, closer to the tank than to the outlet, the water percolates through its thickness and slows down so that when falling into the tank it hardly disturbs the induced surface current.
• the water which falls on the draining layer 121 is concentrated on a small surface, symbolized by the arrows 123, the water is slowed down and spreads horizontally while crossing the draining layer so as to widen the flow falling into the tank, which is illustrated by arrows 125, which occupy a larger surface area.
• the first filter 24 is a microfiltration filter capable of filtering particles of size between 0.1 ⁇ m and 10 ⁇ m.
• the filter 24 is preferably a ceramic filter in order to eliminate oils.
• the filter 24 can also be a filter allowing the creation of a treating and beneficial ecosystem such as a filter media based on porous fibers. This effect is obtained for example with zeolite or diatoms. Zeolite allows for better filtration than sand. Due to its crystalline structure, zeolite allows a filtration fineness of around 5 microns.
• the second optional filter 26, used to reduce odors is preferably a carbon filter.
• the first tank also includes a level sensor not shown in the figures which makes it possible to measure the quantity of gray water in the tank and detect variations in this quantity, in one direction or another.
• a level sensor not shown in the figures which makes it possible to measure the quantity of gray water in the tank and detect variations in this quantity, in one direction or another.
• the circulation and flow in the second fluid circuit does not depend on the water demand in the water inlet.
• the two circuits are independent of each other and each has its own pump. In this way, water circulation can be maintained in the second circuit while water circulation is stopped in the first fluid circuit.
• the first fluidic circuit 10 circulates the gray water sucked up by the inlet 29 located in the first tank 100 thanks to a pumping means such as a pump 18 towards the water outlets 110 and 120 passing through means of water treatment.
• the first fluid circuit 10 comprises a solenoid valve 85 located downstream of the pump 18 which, when closed, prevents the fluid from returning to the pump 18.
• the filtration means comprise at least one membrane filter 13 of type of ultrafiltration and preferably two membrane filters 13 in parallel which carry out the ultrafiltration of the water passing through them, the filtration fineness of the ultrafiltration membrane filter 13 being greater than the filtration fineness of the microporous media filter 24 of the second fluidic circuit.
• the pump 18 maintains the pressure necessary for the water to pass through the membrane filters 13. These filters allow the separation of bacteria, viruses and protozoa present in the water.
• the first fluid circuit 10 comprises at least two pressure sensors 51, 52 measuring a pressure P1 and P2 respectively upstream and downstream of the membrane filters 13.
• the pressure measurements P1 and P2 are carried out continuously upstream and downstream of the membrane filters in order to monitor the state of clogging of the membranes. The more the membranes are clogged, the greater the pressure exerted to filter the same volume of water, thus the pressure difference between P2 and P1 will tend to increase.
• the flow rate of the pump 28 of the second fluid circuit is greater than the flow rate of the pump 18 of the first fluid circuit and preferably twice as large.
• the pump flow rate corresponds to a certain volume of water delivered by the pump per unit of time.
• the first fluid circuit has a drain bypass line which, when open, directs water to drain 130 or sewers.
• This line is equipped with a solenoid valve 91 and ends in the fluid evacuation line of the first circuit 10 just before the manual valve 62.
• the first fluidic circuit 10 includes a second bypass line which connects the inlet and outlet of the membrane filters 13. This line is used as a line for backwashing the membranes as will be seen later.
• a diversion solenoid valve 86 located on the diversion pipe allows, when open, to direct the backwashing water downstream, the solenoid valve 85 being closed.
• an ultraviolet filter 14 Downstream of these membrane filters is an ultraviolet filter 14 which consists of continuously disinfecting the water using an ultraviolet light source.
• the circuit includes a solenoid valve 87 which, when closed, prevents the backwash water from returning to the second tank via the second fluid line 32.
• the first fluidic circuit 10 comprises at least one flow and conductivity sensor 53. Before the water outlets, a sensor 53 measures the flow and conductivity of the water in the circuit and a multi-parameter probe 54 measures the turbidity, the color and temperature of the water.
• the second fluid circuit 20 has a bypass fluid line which, when open, directs the water towards the drain 130 or the sewers.
• This line is equipped with a solenoid valve 91 and a manual valve 62.
• the third fluidic circuit 30 has a fluidic inlet into the second tank 200 which is filled with clean and fresh water thanks to an external water inlet 201 or water from the network.
• a pump 38 allows the discharge of water from the second tank 200 towards one or two of the three fluidic lines 31, 32 and 33 depending on the programmed operating mode of the device.
• a fluid pipe line is provided with a solenoid valve 92 and a manual valve 63. When this line is open, it allows the water from the tank 200 to be evacuated towards the drain 130 or the sewers.
• the device according to the invention has the advantage of being able to be autonomous in mains water thanks to the tank 200 of clean and fresh water.
• the third fluidic circuit includes a sensor 55 which makes it possible to control the flow rate and the conductivity of the water leaving the tank 200.
• the conductivity of the water in the second tank 200 must be between 400 ⁇ S/cm and 700 ⁇ S/ cm (micro Siemens per centimeter).
• Sensor 56 measures the quantity of network water consumed.
• the third fluidic circuit 30 also includes a fluidic line provided with a solenoid valve 94 and a dosing pump 48 connected to a reservoir of disinfectant solution used only in the event of non-compliance with the microbiological laboratory analyzes of the recycled water .
• the device also comprises a control module 45, a peripheral module 46 and a loading module 47.
• the control module 45 comprises an electronic card provided with a microprocessor equipped with a memory, a clock and a control program.
• the control module 45 also includes means for managing peripherals and power management.
• the peripheral module includes the peripherals controlled by the control program, that is to say all the solenoid valves and pumps, and includes the peripherals configured to send data to the control module, these are the sensors, the multi-parameter probe, tank level sensors and water inlet control button 73. The sensors and the probe transmit their data continuously to the control module 45.
• the peripheral module 46 includes a 4G interface and an associated antenna for receiving and sending information via a 4G network.
• the charging module 47 includes a battery powered by the solar panels 77 in order to electrically power the control module 45 and the peripherals of the peripheral module 46.
• control module is configured to control the opening and closing of the solenoid valves and to control the pumps according to several stored operating modes.
• the water recycling device operates in several modes, the main ones of which take place automatically depending on the data transmitted.
• the general operating mode is the mode in which the water outlets 110 and 120 are supplied only with recycled water coming from the first fluidic circuit 10, the solenoid valves 85, 87, 88 and the water outlet solenoid valve 84 being open.
• the tanks 100 and 200 each include a level sensor adapted to transmit to the control module 41 information on the filling volume of each tank.
• the control module being adapted to control the filling of the second tank 200 with water from the network 201 or the filling of the first tank 100 with water from the second tank 200 as soon as a level sensor has detected a level predetermined filling bottom.
• the filling of tanks 100 and 200 is stopped as soon as a predetermined high filling level is reached.
• the water outlets 110 and 120 of the device are supplied by the first fluid line 31 whose solenoid valve 81 is open.
• the solenoid valve 82 of the second fluid line 32 is open while the solenoid valve 83 of the third fluid line is closed.
• the backwash mode is triggered when the difference between the measured pressures P1 and P2 is greater than 1.5 bars or when the water outlet 110, 120 is supplied with recycled water for a duration greater than a predetermined duration, the duration predetermined time which can range from 1 hour to 3 hours and preferably equal to 2 hours.
• the control module automatically controls for a predetermined duration:
• the volume of water used is controlled by a flow limiter 42 located on the second fluid line 32.
• the predetermined duration of backwashing is preferably programmed at 30 seconds.
• the water recycled at the outlet of the filters 13, 14 and 15 is continuously monitored using the sensor 53 and the probe 54.
• the water collected in the first tank 100 can be loaded with salt and ammonium from users' urine, which tends to increase its conductivity.
• the control module can control the stopping of the supply of water outlets 110 and 120 with recycled water and the dilution of part of the water.
• the water in the first tank and its draining are the dilution and draining modes.
• control module 45 controls the dilution of part of the water contained in the first tank 100 This dilution can be 15% or 50%, the 50% dilution corresponding to a 50% emptying of the first tank 100.
• control module 45 commands simultaneous way:
• control module 45 commands for 4 minutes:
• control module controls the opening of the third fluid line 33 to fill the first tank 100 with water from the second tank 200 until the predetermined high filling level of the first tank is reached.
• an emptying of 50% of the volume of the first tank 100 is carried out automatically at night.
• the control module 45 controls the dilution of part of the water contained in the first tank 100 at a predetermined frequency. For example, every 30 minutes of use of the recycling device in a closed circuit (nominal operating mode), the dilution mode is activated for 2 minutes with a drinking water inlet flow rate of 5L/min and a drain flow rate of 5L/min.
• control module 45 every 30 minutes of use of the closed circuit recycling device, the control module 45 simultaneously commands:
• This dilution can be 15% or 50%, the 50% dilution corresponding to a 50% emptying of the first tank 100.
• the water outlets 110 and 120 of the device are supplied with water from the second tank 200 via the first fluidic pipe 31 of which the solenoid valve 81 is open and the solenoid valve 82 is closed.
• the filling of the first tank 100 takes place just after its emptying by opening the solenoid valve 83 to allow the passage of water from the second tank 200 to the first tank 100.
• the quality of the added water is controlled using the sensor 55, the conductivity of the added water must be between 400 ⁇ S/cm and 700 ⁇ S/cm.
• a flow limiter 43 maintains the flow at approximately 15 l/min.
• the circulation pump 28 of the second fluid circuit runs continuously as long as the tank 100 is filled to its predetermined high filling level for optimal operation, i.e. corresponding to a volume of water of between 50 and 100 liters.
• the pump 28 can be programmed to operate intermittently, for example for half an hour every hour.
• the level sensor of the first tank detects a faster level increase than that obtained with two water outlets operating at a maximum flow rate of 6 l/min , the emptying of the first tank is programmed instantly. This mode makes it possible to avoid pollution and contamination of the recycling device by spilling any liquid into the first tank.
• Water samples can be taken regularly and in the event of non-compliance with microbiological laboratory analyzes such as the presence of pathogenic germs, in particular protozoa, disinfection methods are provided.
• a first disinfection mode provides for the backwashing of filters 13 and 14 like the backwashing mode described previously but with injection of a chlorine solution such as chlorine dioxide, using the dosing pump 48 connected to a reservoir of a disinfectant solution . This disinfection is followed by backwashing the tank 200 with water as described previously. This disinfection mode is preferably started in the evening or at night when the recycling device is least used, particularly if it is a beach shower.
• a second disinfection mode more thorough than the first, consists of injecting a chlorine solution in the same way as in the first mode but without backwashing, the steps consist of:
• the water outlets 110 and 120 are supplied with water from the tank 200.
• the water recycling device according to the invention has the advantage of recycling 80% of the water used.

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• Hydrology & Water Resources (AREA)
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• 2022
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