FR3087435A1 - METHOD FOR CONDITIONING WATER FOR ITS USE FOR AGRICULTURAL PURPOSES - Google Patents

Abstract

The invention relates to a method for conditioning water with a view to being mixed with at least one phytosanitary product comprises a step of filtration and demineralization of the water consisting of an injection into the water of doses (4) of an agent capable of precipitating iron ions, circulation of water in filtration means (4) and (5) of organic matter in suspension in water and in contact with a demineralizing bed (6) composed of a cationic resin and a step of automatic parameterization of the pH (16a, 16b), of a temperature (13) and of a conductivity (8) of the water thus filtered and demineralized to the respective values of use of a product phytosanitary or a mixture of phytosanitary products selected from a group of phytosanitary products previously memorized with their respective pH, temperature and conductivity use values.

Description

Method of conditioning water for use in agricultural purposes The invention relates to a method of conditioning water for use in agricultural purposes, and extends to a device for conditioning water. water for carrying out said conditioning process.

Numerous activities in the agricultural field requiring water require prior conditioning of filtration and demineralization of this water regardless of the origin of the latter here (borehole water, well water, spring water or water. of the urban network ...).

This conditioning of the water is thus required, by way of example, for the washing of certain agricultural equipment, in the lifting field for the treatment of water consumed by animals, in the wine-growing field for washing. cellars, stainless steel vats, bottling lines ...

Such packaging is also more and more frequently used for the preparation of agricultural slurries intended to be sprayed and composed of a mixture of water and one or more phytosanitary products.

In fact, it has been established that a prior filtration and demineralization of the water make it possible to eliminate the elements of this water which are liable to destroy and neutralize the active materials of plant protection products, to destabilize certain mixtures, and to limit the effectiveness of surfactants.

The filtration means of current conditioning installations conventionally consist of sand filters.

The demineralization means of these installations currently consist of demineralizing beds composed of cationic resins.

However, taking into account in particular the selectivity of the cationic resins currently available on the market, it is difficult to find universal resins and it would be advisable to have a demineralization of the water 30 specifically adapted to the treated water.

With a view to demineralizing water, studies have focused on the use of reverse osmosis systems.

However, this technique was not adopted mainly due to the cost of the installations.

The present invention aims to overcome this drawback and its essential objective is to provide conditioning water for a plant protection product 2 or a mixture of plant protection products which is particularly suited to the specificities of the product or of the mixture.

To this end, the present invention relates to a method for conditioning water with a view to being mixed with a product or with a mixture of phytosanitary products specific for agricultural purposes, characterized in that the method comprises, on the one hand , a step of filtration and demineralization of the water consisting in successively combining: - injection into the water of doses of an agent capable of precipitating iron ions, 14: 1 - circulation of water in means of fff # rat on organic matter suspended in water, - circulation of water in contact with a deaeralising bed composed of a cationic resin, and, on the other hand, an automatic pH parameterization step, a temperature and a conductivity of the water thus filtered and demineralized to the respective values of use of a phytosanitary product or of a mixture of phytosanitary products selected from a group of phytosanitary products previously memorized with their values d 'the use of respective pH, temperature and conductivity.

Advantageously, tin injects a hypochlorite with a view to precipitating iron ions.

Advantageously, for the parameterization of the filtered and demineralized water, an aqueous salt solution is injected into the water in an amount suitable for making the conductivity of the water equal to the conductivity of the product or of the selected phytosanitary mixture.

Advantageously, the aqueous salt solution is stirred before it is injected into filtered and demineralized water.

Advantageously: the filtration and demineralization of the water is carried out in a first hydraulic circuit comprising means for circulating the water and at least one buffer tank in which the filtered and demineralized water is delivered, the automatic parameterization of the filtered and demineralized water in a second hydraulic circuit connected to said at least 3 one buffer tank and comprising means for circulating the water and an outlet for treated water.

Advantageously, the circulation of water in the second hydraulic circuit is triggered when the filling rate of said at least one buffer tank reaches a predetermined minimum value.

The invention relates to a device for conditioning water with a view to being mixed with a product or with a mixture of phytosanitary products for implementing such a method for conditioning water, characterized in that it comprises filtration and demineralization means comprising in combination - means for injecting doses of a product capable of precipitating iron ions, - means for filtering organic matter in suspension in water, 15 - a bed demineralizer composed of a cationic resin, - means for adjusting the pH of the filtered and demineralized water, - means for heating the filtered and de-mineralized water adapted to bring it and maintain it at a predetermined set temperature, - means for injecting into filtered and demineralized water doses 20 of an aqueous salt solution suitable for varying the conductivity of the water, - the control unit comprising a stored file of phytosanitary products and mixtures d e phytosanitary products integrating, for each product and mixture of products, the product-specific pH, temperature and conductivity parameters, said control unit being programmed to apply said parameters to filtered and demineralized water after selection of a product or mixture of products.

Advantageously, the filtration and demineralization means comprise a mesh filter.

Advantageously, your means for adjusting the pH comprise means for injecting into the water doses respectively of a basic solution and of an acid solution.

Advantageously, the water heating means consist of at least one electrical resistance.

4 Advantageously, the packaging device comprises means for storing the aqueous salt solution incorporating a stirrer for stirring said aqueous salt solution.

Advantageously, the conditioning device comprises: s - a first hydraulic circuit for filtering and demineralizing the water comprising means for entering unfiltered and non-demineralized water into the device, means for circulating the water and at least one buffer tank in which the filtered and demineralized water is delivered, - a second hydraulic circuit for the treatment of filtered and demineralized water connected to said at least one buffer tank and comprising means for circulating the water. water and a treated water outlet.

Advantageously, the conditioning device comprises means for measuring the degree of filling of said at least one buffer tank and means for controlling means for circulating water in the second hydraulic circuit capable of triggering the circulation of water. water in said second hydraulic circuit when the filling rate of said at least one buffer tank reaches a predetermined minimum value.

Advantageously, the control unit comprises means for memorizing a conditioning of filtered and demineralized water as zo relating to a volume to be conditioned, a number of operating cycles of the device and of the conditioning parameters, the unit of control being programmed to select either an immediate start or a delayed start of a predetermined time of the water conditioning.

Advantageously, the packaging device comprises a programmable man / machine interface by which an operator uses a code representative of a phytosanitary product or of a mixture of phytosanitary products for the packaging of filtered and demineralized water specific for the phytosanitary product. or the mixture of phytosanitary products.

Other characteristics, aims and advantages of the invention will emerge from the detailed description which follows with reference to the appended drawing which represents, by way of nonlimiting example, a preferred embodiment.

In this drawing: - Figure 1 shows a schematic view of an embodiment of a device for conditioning water with a view to being mixed with a plant protection product or a mixture of plant protection products specific for agricultural purposes according to the invention.

With reference to FIG. 1, the present invention relates to a method of conditioning water with a view to being mixed with a product or with a mixture of phytosanitary products specific for agricultural purposes.

This product or this mixture of products can be for example, without this being limiting, a suspension of fungicides, herbicides or insecticides, used to treat plant diseases or to fight harmful insects, in particular Bordeaux mixture used in the treatment. mildew.

This product or this mixture of phytosanitary products must be spread with predefined characteristics, in particular a concentration by being diluted in water, a specific pH, temperature and conductivity.

The method according to the present invention is articulated between a step of filtration and demineralization of a = water which has not undergone any treatment to give filtered and demineralized water and a step of setting the pH 16a, 16b, a temperature 13 and a conductivity 8 of the water thus filtered and demineralized to bring it closer in terms of the characteristics of the plant protection product or of the mixture of plant protection products for which the filtered and demineralized water serves as a solvent.

The filtration step and d. ineralization of water 'ste to be combined successively: - injection into water of doses 4 of an agent capable of precipitating iron ions, - circulation of water in filtration means 4 and 5 of organic matter in suspension in water, - circulation of water in contact with a demineralizing bed 6 composed of a cationic resin, The setting step, automatic in the sense that this step is implemented by a conditioning 1 itself without an operator then having to enter the parameters, is carried out on values of pH, 6 of temperature and of conductivity of the water thus filtered and demineralized after implementation of the first step.

The parameter setting step makes the values of the water thus filtered and demineralized coincide with the respective values of use of a product, phytosanitary s or a mixture of phytosanitary products selected from a group of phytosanitary products previously memorized with their values. prescribed uses for the respective pH, temperature and conductivity.

The operator, advantageously a farmer, only has to identify the name or a code of the product or of the mixture on a console of the packaging device 1.

As the conditioning device 1 has stored the product or mixture with its characteristics of pH among a large quantity of other products or mixtures, of temperature and conductivity, the conditioning device 1 automatically carries out a treatment of the filtered water and demineralized to make it take the same values as the selected product or mixture.

To precipitate iron ions, a hypochlorite can be injected.

In aqueous solution, the chemical element iron is present in ionic form with two main valences Fe2 + and Fe3 +.

The Fe2 + ion or iron (II) ion, formerly called ferrous, can take 20 different colors of solution. The solution obtained by dissolving Mohr's salt, for example, has a pale green color.

Such a solution is stable for pH less than 6.

For a pH above this value, ferll hydroxide FeOH2 precipitates.

The Fe3 + ion or iron (111) ion, formerly called ferric, can dissolve an orange color in a solution of iron (III) chloride or colorless in a solution of iron (III) nitrate.

These solutions must have a pH lower than 2 because iron (III) hydroxide FeOH3 is poorly soluble.

A certain number of ions lead to the precipitation of iron ions in solution.

The hydroxide ion HO- is one of these.

The sulfide ion S2- allows the formation of iron (II) sulfide FeS, iron (III) sulfide and Fe2S3 at not too acidic pHs.

Indeed, a reasonable amount of sulfide ions must be present, which is not the case at acidic pH since the sulfide ion is then in its diacid form, 1-12S hydrogen sulfide.

The present invention prefers the use of a hypochlorite.

A hypochlorite, is a chemical compound containing the hypochlorite anion, of the formula CIO-, where the chlorine atom is in the +1 oxidation state.

This anion is a hypohalite and the conjugate base of hypochlorous acid HC10, and hypochlorites are the salts of this acid.

These are, for example, sodium hypochlorite NaClO, constituting bleach and calcium hypochlorite CaC102, used in particular for chlorinating swimming pool water.

The iron is precipitated by chemical reaction, in particular by injection of hypochlorite and will then be removed by the sand filter.

Resins cannot properly retain this element.

This is why the precipitation of iron takes place advantageously before demineralization and filtration.

Filtration before demineralization preserves your resins and increases their lifespan.

As a general idea, unlike a lifespan of 10 years in an industrial environment in continuous flow, demineralization after filtration as proposed by the present invention makes it possible to obtain a double lifespan for the resins.

For a circulation of the water in the filtering means 4 and 5 of the organic matter suspended in the water, it is possible to use a sand filter and a mesh filter.

For circulation of water in contact with a demineralizing bed 6 20 composed of a cationic resin, it is possible to use a high-end resin, in particular but not only possibly of the brand DOW® DOWER HCR-S / S which has a great capacity for exchanges.

In this first step, filtering is therefore carried out to remove the organic matter in suspension which represents absorbent surfaces which can block the molecules of the active materials.

Demineralization removes all mineral salts and metal cations, such as calcium, magnesium, iron having previously been removed by precipitation, etc., which have a detrimental effect on the good performance of the active materials.

These elements destabilize the formulations and cause chemical reactions partially neutralizing the action of the active ingredients.

They also cause the formation of deposits.

To modify the pH of the filtered and demineralized water in order to bring it closer to the pH of the product or of the mixture of phytosanitary products intended to be mixed with water, it can be carried out with injections of basic 17b and 17a acid doses in filtered and demineralized water.

8 The adaptation of the pH of the water in correspondence with the pH of the product or of the mixture of phytosanitary products is necessary to place the molecules of the active materials in their stability medium and to avoid their degradation. s In agriculture, particular attention should be paid to the pH of the water.

Indeed, on pH levels that are too far apart, phytosanitary products undergo a chemical reaction called alkaline hydrolysis, a process which degrades the active substance and reduces its effectiveness.

As very sensitive products, mention may be made of insecticides of the organophosphate and carbarnate families as well as herbicides such as dicarboxymides.

The rate of hydrolysis is measured in terms of its half-life or DT 50, which is the time it takes for the active molecule to degrade and reach half of its original level.

The shorter the half-life, the faster the plant protection product degrades.

This factor will play on the stability of the molecules in the sprayer or in other words on the safety of carrying out its treatments in a safe manner, including in the event of remote or interrupted work sites.

To adapt the conductivity of the filtered and demineralized water with a view to bringing it closer to the enductivity of the product or of the mixture of phytosanitary products intended to be mixed with water, an aqueous solution of salt can be injected into the water. in an amount suitable to make the conductivity of the water equal to the conductivity of the selected phytosanitary product.

This includes passing through a brine bath 8 with a stirring stirrer 18.

It is thus possible to use a brine for the parameterization of the conductivity.

Brine is an aqueous solution of a salt, usually sodium chloride NaCl, saturated or in high concentration.

Natural or artificial, it is used in particular as a preservative for foods or as a heat transfer fluid.

The aqueous salt solution can be stirred before it is injected into the filtered and demineralized water.

A variation in the conductivity of the water, advantageously an increase in the conductivity, promotes the exchange between the phytosanitary product or the mixture and the plants and increases the supply activity in the tissues.

9 The temperature setting standardizes the aqueous solution of the product or of the mixture of phytosanitary products and promotes the rapidity of penetration of the active ingredients into the plants.

Water interacts with phytosanitary products to the point of becoming a factor limiting the success of certain interventions; the efficiency results will depend directly on the quality of the water and the quantity of water used.

This is why it is important to configure the water to adapt it specifically to the product or to the phytosanitary mixture.

Other parameters than those previously mentioned can also be taken into consideration here.

The hardness of water is generally characterized by the quantity of calcium and magnesium ions dosed in the water.

Molecules of phytosanitary products such as glyphosate or mesosteuron are especially sensitive to it because they combine with calcium ions.

It should be understood that the more the operator tends to reduce the doses of product per hectare, the greater the impact of water will be on inhibition by minerals and metal cations.

The filtration and demineralization step of a water which has not undergone any treatment to give filtered and demineralized water and the parameterization step can be implemented in two hydraulic circuits 1a, 20 1b which are different but communicating if necessary. .

The filtration and demineralization of the water can be carried out in a first hydraulic circuit 1a comprising means for circulating the water 2 and at least one buffer tank 10 into which the filtered and demineralized water is delivered.

This makes it possible to keep a reserve of water for another water parameterization step or to wait until there is sufficient filtered water and demineralize to perform a parameterization step. the automatic parameterization of the filtered and demineralized water can be carried out in a second hydraulic circuit lb connected to said at least one buffer tank 10 and comprising means for circulating the water 15 and a water outlet processed.

This filtered, demineralized and parameterized water outlet is used to supply water when mixing with the product or the mixture of phytosanitary products.

Preferably, the circulation of filtered water can be triggered and in the second hydraulic circuit lb be triggered when the filling rate of said at least one buffer tank 10 reaches a predetermined minimum value.

FIG. 1 shows a conditioning device 1 for implementing the method according to the present invention.

All the illustrated characteristics of the packaging device 1 are not necessarily essential for the implementation of the packaging method according to the invention.

As will be more precisely detailed later, the conditioning device 1 comprises a first hydraulic circuit 1a and a second hydraulic circuit 1b. ta The first hydraulic circuit 1a comprises an inlet & sien which may be different depending on a location of the conditioning device 1, this water being filtered and demineralized in the first hydraulic circuit 1a.

An inlet pump 2 creates a circulation of water in the first hydraulic circuit 1a.

A precipitating agent is injected, using a metering pump, from a reserve of agent 3 into a first column for precipitating iron ions 4 containing means for injecting doses of a product. suitable for precipitating iron ions and a sand filter.

The water thus treated enters a second filtration column 5 comprising means 4 and 5 for filtering the organic matter in suspension in the water, advantageously in the form of a sand and mesh filter.

A third, advantageously double, demineralization column 6 incorporates a demineralizing bed composed of at least one cationic resin.

At the outlet of the first hydraulic circuit 1a is a buffer tank 10 for filtered and demineralized water before the second hydraulic circuit 1b of the conditioning device 1.

An inlet pressure regulator 7 regulates the pressure at the inlet of the third demineralization column 6 or of each third demineralization column 6.

In the second hydraulic circuit 1b, there is provided a brine tank 8 advantageously provided with a stirring stirrer 18, the brine tank 8 providing means of injection into the filtered and demineralized water of doses of a solution. aqueous salt adapted to vary the conductivity of the water, this in a first branch of filtered and demineralized water.

The first branch can be closed if necessary by a valve 11b upstream 35 of the brine tank 8.

11 In an auxiliary branch bypassing the first branch, a filtered water meter 9 can be provided.

The first branch opens directly at the end of the first hydraulic circuit 1a into at least one water storage tank known as the buffer tank 10. As a bypass from the first branch upstream of the auxiliary branch in bypass, a second branch is stitched.

This second branch can be closed by a valve 11b, if all the filtered and demineralized water is directed to the buffer tank 10.

In the second branch in parallel, upstream of a brine bath & there is a valve 11a, and downstream of the brine bath 8 is a valve 11c then a metering pump with conductivity 12.

The water storage buffer tank 10 comprises a return line comprising a second pump 15 of the second hydraulic circuit 1b of the conditioning device I and a pressure gauge.

15 Prior to its passage through a water heating tank 13, the water in the return pipe leaving the buffer tank 10 passes through control probes 14 which are respectively a conductivity control probe, a temperature control probe. pH and a pressure control probe of the second pump 15 forming part of the second hydraulic circuit lb in zo ensuring the circulation of water in this circuit.

A valve lld is located on the return line downstream of the control probes.

The return pipe then supplies a water heating tank 13 comprising water heating means 13a, the heating means 13a being adapted to heat the water and maintain it at a predetermined set temperature in correspondence with the desired temperature of the product or of the mixture of phytosanitary products.

After passing through a conductivity metering pump 12 downstream of the brine bath 8 and of the valve 11c, the second branch opens into the return pipe downstream of the heating tank 13, the return pipe 30 returning to your buffer tank 10.

Two auxiliary branches extending in parallel open consecutively into the return pipe downstream of the tap-off of the second branch in the return pipe.

A first auxiliary branch comprises an acid metering pump 16a while a second auxiliary branch 35 comprises a basic metering pump 16b providing the means 12 for adjusting the pH 16a, 16b of the filtered and demineralized water with respectively an organ for injecting an acid reagent 17a and a member for injecting an alkaline reagent 17b into the return pipe.

Thus, in summary, the present invention also relates to a device 1 for conditioning water with a view to being mixed with a product or with a mixture of plant protection products for an implementation of a water conditioning process. as previously described.

The water conditioning device 1 comprises means of filtration 4, 5 and demineralization 4, 6 comprising, for the implementation of the filtration and demineralization step: - means for injecting doses of a agent capable of precipitating your iron ions, advantageously hypochlorite, which is done in the first precipitation chamber 4, - filtration means 4, 5 of the organic matter in suspension in the water, which is also made in the first filtration chamber 4 and in the second filtration chamber 5, - a demineralizing bed 6 composed of a cationic resin which is housed in the third demineralization chamber 6.

For the implementation of the parameterization step, the water conditioning device 1 comprises: - means for adjusting the pH 16a, 16b of the filtered and demineralized water, - from heating means 13a of filtered and demineralized water suitable for ja potter and to maintain it at a predetermined set temperature, - means of injection into the filtered and demineralized water of doses of an aqueous salt solution suitable for varying the conductivity of water, which is illustrated by the brine bath 8.

In addition, the control unit has a stored file of 30 phytosanitary products and mixtures of phytosanitary products.

This stored file incorporates, for each product and product mixture, the product-specific pH, temperature and conductivity parameters.

This control unit is programmed to apply said parameters to the filtered and demineralized water after selection of a product or mixture of products, this by controlling the means for adjusting the pH 16a, 13 16b of the filtered and demineralized water. , the heating means 13a of the filtered and demineralized water and the means for injecting an aqueous salt solution 8 into the filtered and demineralized water.

The filtration means 5 may include a mesh filter. s The means for adjusting the pH 18a, 18b may comprise means for injecting into the water doses respectively of a basic solution 17b and of an acid solution 17a.

The water heating means 13a can consist of at least one electrical resistance, which is less polluting than heating with fuel oil. An electric resistance heating system can have an output of 9 kW to 18 kW.

The conditioning device 1 can comprise storage means in the form of a brine bath 8 of the aqueous salt solution incorporating a stirring stirrer 18 of the aqueous salt solution.

15 Conductivity setting is very fast and accurate with optimum saturation brine through the stirring process to increase conductivity even beyond 3,000psicrn or siemens per centimeter.

As previously mentioned for the two-step process, the conditioning device 1 can comprise two hydraulic circuits 20 la and lb.

A first hydraulic circuit 1a for filtering and demineralizing the water may include means for entering unfiltered and non-demineralized water into the device, means for circulating the water 2 in the form of a pump. and at least one buffer tank 10 into which the filtered and demineralized water is supplied and then stored.

A second hydraulic circuit lb for treating the filtered and demineralized water can be connected to said at least one buffer tank 10 and can include means for circulating the water 15 and an outlet for treated water.

The conditioning device I may comprise means for measuring the degree of filling of said at least one buffer tank 10 and means for controlling the means for circulating water 15 in the second hydraulic circuit lb capable of triggering the flow. circulation of water in said second hydraulic circuit lb when the filling rate of said at least one buffer tank 10 reaches a predetermined minimum value.

14 This minimum value can be calibrated and may correspond to an aqueous solution of product or of a mixture of phytosanitary products to be produced, given that it is more economical to carry out a setting on a quantity of filtered and demineralized water corresponding to a required capacity of aqueous solution rather than making several successive calibrations on smaller amounts of water.

The control unit may include means for storing conditioning of filtered and demineralized water, taking into account parameters such as a volume to be conditioned, a number of operating cycles lo of the device and conditioning parameters.

The control unit can be programmed to select either an immediate start or a delayed start of a predetermined time of the water conditioning.

The control unit has also memorized what quantity of filtered and demineralized water must correspond to a desired solution of a given product or mixture of phytosanitary products, in particular the desired concentration of the product or of the mixture of products in the container. solution and the amount of product or mixture to be solubilized.

For automatic control of the packaging process, the packaging device 1 can comprise a programmable human / machine interface 20, for example in the form of a touchscreen console, with keyboard or buttons.

The operator can thus use a code or the representative name of a plant protection product or of a mixture of plant protection products for the conditioning of filtered and demineralized water specific for the plant protection product or the mixture of plant protection products.

The system programming on a touch screen provides a simple interface for easy access and quick handling, as well as monitoring of the packaging process.

The different parameters can be the volume of water, the pH, the temperature and the conductivity, etc., but this is not limiting.

Phytosanitary products stored with their characteristics can be consulted in the control unit of the packaging device 1 with personalized recording of the treatment program corresponding to this product or to a mixture of phytosanitary products.

15 This frees the operator from a whole research work on the parameterization of the filtered and demineralized water with a view to dissolving a product or a mixture of phytosanitary products.

Dose reduction is induced.

The operator must be able to gauge this reduction as a function of the problems and parasitic pressures he has to face on his crop.

The farmer remains in control and responsible for his choices when it comes to the products and quantities he uses.

The conditioning device 1 has a compact structure by grouping together two different operations on the water to make it suitable for dissolving a product or a mixture of phytosanitary products capable of filtering and setting the water precisely according to the specific conditions of each phytosanitary product or mixture.

Thus, it is obtained a securing of the efficiency of the phytosanitary products, an adjustment or an adaptation of the doses of treated water without loss of efficiency, an improvement in the spraying of the product or of the mixture, a reduction in residues and a better monitoring of regulations and prescriptions, which makes it possible to reconcile economic performance and ecology.

It is known that the quality of the starting water is different depending on the location of the packaging. of the product or mixture of phytosanitary products.

The advantages of the conditioning process according to the present invention are an optimization of the treatments thanks to a water parameterized according to the profile of the product or of the mixture of phytosanitary products, a better dilution and the elimination of deposits, an increase in the speed of absorption. of the product or of the mixture by the plants. It should be noted that such filtered, demineralized and parameterized water can also be used for cleaning equipment and cellars or for breeding. 16

Claims (14)

1 / A method of conditioning a water with a view to being mixed with a phytosanitary product or with a mixture of specific phytosanitary products for agricultural purposes, characterized in that the method comprises, on the one hand, a filtration step and demineralization of water consisting of successively combining: - an injection into the water of doses (4) of an agent capable of precipitating iron ions, - circulation of the water in filtration means (4) and (5) of the organic matter suspended in the water, - a circulation of water in contact with a demineralizing bed (6) composed of a cationic resin, and, on the other hand, a step of automatic setting of the pH (16a, 16b), of a temperature (13 ) and of a conductivity (8) of the water thus filtered and demineralized to the respective values of use of a phytosanitary product or of a mixture of phytosanitary products selected from a group of phytosanitary products previously memorized with their values of use of respective pH, temperature and conductivity. 21 A method of conditioning water according to claim 1, characterized in that one injects (3) a hypochlorite for the precipitation of iron ions. 3 / A method of conditioning the water according to any one of claims 1 or 2, characterized in that, for the configuration of filtered and demineralized water, an aqueous salt solution is injected into the water in a suitable amount to make your conductivity of Water equal to the conductivity of the selected product or phytosanitary mixture. 4 / A method of conditioning water according to the preceding claim, characterized in that one carries out a stirring of the aqueous salt solution before its infection in filtered and demineralized water. 5 / A method for conditioning the water according to any one of the preceding claims, characterized in that: - we perform the filtration and demineralization of the water in a 5 first hydraulic circuit (1a) comprising means for circulating the water (2) and at least one buffer tank (10) in which the filtered and demineralized water is delivered, - the filtered and demineralized water is automatically configured in a second hydraulic circuit (1b) connected to said at 10 minus a buffer tank (10) and comprising means for circulating water (15) and an outlet for treated water. 6 / A method of conditioning the water according to claim 5, characterized in that the circulation of water is triggered in the second hydraulic circuit (1b) when the filling rate of said at least one buffer tank (10 ) reaches a predetermined minimum value. 7 / Device for conditioning (1) the water with a view to being mixed with a product or a mixture of phytosanitary products for implementing a method of conditioning the water according to any one of the previous claims, characterized in that it comprises filtration means (4) and (5) and demineralization (4, 6) comprising in combination: - Means for injecting (3a) doses of an element capable of precipitating iron ions. 25 - means of filtration (4) and (5) of organic matter suspended in the water, - a demineralizing bed (6) composed of a cationic resin, - means for adjusting the pH (16a, 16b) of the filtered and demineralized water, 30 - heating means (13a) of the filtered and demineralized water adapted to bring it and maintain it at a predetermined set temperature, - means of injection into filtered and demineralized water of doses of an aqueous salt solution suitable for varying your conductivity of the water, - the control unit comprising a stored file of phytosanitary products and mixtures of phytosanitary products integrating, for each product and mixture of phytosanitary products, the pH, temperature and conductivity parameters specific to the product, said unit of 5 command being programmed to apply the said parameters to the filtered and demineralized water after selection of a product or mixture of phytosanitary products. 8 / A water conditioning device (1) according to claim 7, io characterized in that the Walloon means (4) and (5) and demineralization (4, 6) comprise a mesh filter (5). 9 / A water conditioning device (1) according to claim 7 or 8, characterized in that the means for adjusting the pH (16a, 16b) 15 comprise means for injecting doses of an acid solution (17a) and a basic solution (17b) into the water, respectively. 10 / A water conditioning device (1) according to any one of claims 7 to 9, characterized in that the heating means (13a) 20 of the water consist of at least one electrical resistance. 11 / water conditioning device (1) according to any one of claims 7 to 10, characterized in that it comprises storage means (8) of the aqueous salt solution incorporating a stirring stirrer 25 ( 18) of said aqueous salt solution. 12 / Water conditioning device (1) according to any one of claims 7 to 11, characterized in that it comprises: - a first hydraulic circuit (1a) for filtration and demineralization 30 of water comprising means for entering unfiltered and non-demineralized water into the device (1), means for circulating the water (2) and at least one buffer tank (10) in which filtered and demineralized water is delivered, - a second hydraulic circuit (1b) for treating the filtered water and 35 demineralized connected to said at least one buffer tank (10) and comprising means for circulating water (15) and an outlet for treated water. 13 / water conditioning device (1) according to claim 5 above, characterized in that it comprises means for measuring the filling rate of said at least one buffer tank (10), and means for controlling means for circulating water (15) in the second hydraulic circuit (1b) capable of triggering the circulation of water in said second hydraulic circuit (1b) when the filling rate of said at least one buffer tank (10) reaches a predetermined minimum value. 14 / Water conditioning device (1) according to any one of claims 7 to 13, characterized in that the control unit comprises means for memorizing a conditioning of the filtered and demineralized water as relating to a volume to be conditioned, a number of operating cycles of the device and conditioning parameters, the control unit being programmed to select either an immediate start or a delayed start of a predetermined time of water conditioning. 15 / A water conditioning device (1) according to any one of claims 7 to 14, characterized in that it comprises a programmable man / machine interface by which an operator uses a code representative of a phytosanitary product or of a mixture of phytosanitary products for the conditioning of filtered and demineralized water specific for the phytosanitary product or the mixture of phytosanitary products.