An electrolyser is a special device that is designed to separate the components of a compound or solution using an electric current. These devices are widely used in industry, for example, to obtain active metal components from ore, to purify metals, to apply metal coatings to products. For everyday life, they are rarely used, but also found. In particular, for home use, devices are offered that allow you to determine the contamination of water or get the so-called "living" water.

The basis of the operation of the device is the principle of electrolysis, the discoverer of which is considered to be the famous foreign scientist Faraday. However, the first water electrolyzer 30 years before Faraday was created by a Russian scientist named Petrov. He proved in practice that water can be enriched in the cathode or anode state. Despite this injustice, his work was not in vain and served the development of technology. At the moment, numerous types of devices have been invented and successfully used that work on the principle of electrolysis.

What is it

The electrolyzer works thanks to an external power source that supplies electric current. Simplified, the unit is made in the form of a housing in which two or more electrodes are mounted. Inside the case is an electrolyte. When an electric current is applied, the solution decomposes into the required components. Positively charged ions of one substance are directed to a negatively charged electrode and vice versa.

The main characteristic of such units is performance. That is, this is the amount of solution or substance that the installation can process in a certain period of time. This parameter is indicated in the model name. However, it can also be influenced by other indicators: current strength, voltage, type of electrolyte, and so on.

Species and types

According to the design of the anode and the location of the current conductor, the electrolyzer can be of three types, these are units with:

1. Pressed baked anodes.
2. A continuous self-baking anode, as well as a side conductor.
3. Continuous self-baking anode, as well as the upper conductor.

The electrolyzer used for solutions, according to design features, can be divided into:

• Dry.
• Flowing.
• Membrane.
• Diaphragm.

Device

The designs of the units may be different, but they all work on the principle of electrolysis.

The device in most cases consists of the following elements:

• Electrically conductive body.
• Cathode.
• Anode.
• Branch pipes designed for electrolyte input, as well as for the output of substances obtained during the reaction.

The electrodes are sealed. Usually they are presented in the form of cylinders that communicate with the external environment using nozzles. The electrodes are made of special conductive materials. A metal is deposited on the cathode or ions of the separated gas are directed to it (during the splitting of water).

In the non-ferrous industry, specialized units for electrolysis are often used. These are more complex installations that have their own characteristics. So an electrolyzer for extracting magnesium and chlorine requires a bath made of end and longitudinal walls. It is lined with refractory bricks and other materials, and is also divided by a partition into an electrolysis compartment and a cell in which the final products are collected.

The design features of each type of such equipment make it possible to solve only specific problems that are associated with ensuring the quality of released substances, the speed of the reaction, the energy intensity of the installation, and so on.

Operating principle

In electrolysis devices, only ionic compounds conduct electricity. Therefore, when the electrodes are lowered into the electrolyte and the electric current is turned on, an ionic current begins to flow in it. Positive particles in the form of cations are sent to the cathode, for example, these are hydrogen and various metals. Anions, that is, negatively charged ions flow to the anode (oxygen, chlorine).

When approaching the anode, anions lose their charge and become neutral particles. As a result, they settle on the electrode. Similar reactions occur at the cathode: cations take electrons from the electrode, which leads to their neutralization. As a result, cations settle on the electrode. For example, when water is split, hydrogen is formed, which rises up in the form of bubbles. To collect this gas, special pipes are constructed above the cathode. Through them, hydrogen enters the necessary container, after which it can be used for its intended purpose.

The principle of operation in the designs of different devices is generally similar, but in some cases there may be some peculiarities. So in membrane units, a solid electrolyte is used in the form of a membrane, which has a polymer base. The main feature of such devices lies in the dual purpose of the membrane. This interlayer can transport protons and ions, including separating electrodes and end products of electrolysis.

Diaphragm devices are used in cases where diffusion of the end products of the electrolysis process cannot be allowed. For this purpose, a porous diaphragm is used, which is made of glass, asbestos or ceramics. In some cases, polymer fibers or glass wool can be used as such a diaphragm.

Application

The electrolyzer is widely used in various industries. But, despite the simple design, it has various versions and functions. This equipment is used for:

• Mining of non-ferrous metals (magnesium, aluminum).
• Obtaining chemical elements (decomposition of water into oxygen and hydrogen, obtaining chlorine).
• Wastewater treatment (desalination, disinfection, disinfection from metal ions).
• Processing of various products (milk demineralization, meat salting, electroactivation of food liquids, extraction of nitrates and nitrites from vegetable products, protein extraction from algae, mushrooms and fish waste).

In medicine, the units are used in intensive care to detoxify the human body, that is, to create high-purity sodium hypochlorite solutions. For this, a flow-through device with titanium electrodes is used.

Electrolysis and electrodialysis plants are widely used to solve environmental problems and water desalination. But these units, in view of their shortcomings, are rarely used: this is the complexity of the design and their operation, the need for a three-phase current and the requirement for periodic replacement of electrodes due to their dissolution.

Such installations are also used in everyday life, for example, to obtain “living” water, as well as to purify it. In the future, it is possible to create miniature plants that will be used in cars for the safe production of hydrogen from water. Hydrogen will become a source of energy, and the car can be filled with ordinary water.

At one time, with the help of electrolysis from molten salts, it was possible for the first time to isolate pure potassium, sodium and many other metals.

Today, this process is also used in everyday life - for the "extraction" of hydrogen from water. The technology is more than affordable, because a water electrolysis device is just a container with a soda solution in which the electrodes are immersed.

The electrodes are small square sheets cut from galvanized steel or, better, from stainless steel grade 03X16H15M3 (AISI 316L). Ordinary steel will be very quickly "eaten" by electrochemical corrosion.

Having cut a hole in the wall of the container with a knife, you need to install two coarse filters on it - “mud collectors” (the second name is an oblique filter) or filters from washing machines are suitable.

Next, a 2.3 mm thick board and a bubble tube are installed.

The creation of the electrolyzer is completed by installing a nozzle with a shutter located on the side of the board.

Top container device

The electrodes are made of a stainless steel sheet measuring 50x50 cm, which must be cut with a grinder into 16 equal squares. One corner of each plate is cut, and a hole for the M6 ​​bolt is made in the opposite.

One by one, the electrodes are put on a bolt, and the insulators for them are cut from a rubber or silicone tube. Alternatively, you can use a tube from the water level.

The container is fixed with fittings and only after that the bubble tube and electrodes with terminals are installed.

Bottom Container Model

In this version, the assembly of the device begins with a stainless base, the dimensions of which must correspond to the dimensions of the container. Next, install the board and tube. Installation of filters in this modification is not required.

Then you need to attach the shutter to the bottom board with 6 mm screws.

The installation of the nozzle is carried out by means of a fitting. If, nevertheless, it is decided to install filters, then plastic clips on rubber gaskets should be used to fasten them.

Finished device

The thickness of the insulators between the electrode plates should be 1 mm. With such a gap, the current strength will be sufficient for high-quality electrolysis, at the same time, gas bubbles can easily come off the electrodes.

The plates are connected to the poles of the power source in turn, for example, the first plate - to the "plus", the second - to the "minus", etc.

Device with two valves

The manufacturing process of a 2-valve electrolyzer model is not particularly difficult. As in the previous version, the assembly should begin with the preparation of the base. It is made from a steel sheet blank, which must be cut in accordance with the dimensions of the container.

The board is firmly attached to the base (we use M6 screws), after which it is possible to install a bubbling tube with a diameter of at least 33 mm. Having picked up a shutter to the device, you can proceed with the installation of valves.

Plastic container

The first is installed on the base of the pipe, for which it is necessary to fix the fitting in this place. The connection is sealed with a clamping ring, after which another plate is installed - it will be needed to fix the shutter.

The second valve should be mounted on the pipe with a distance of 20 mm from the edge.

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Three valve models

This modification differs not only in the number of valves, but also in that the base for it must be especially strong. The same stainless steel is used, but of greater thickness.

The place for installation of valve No. 1 must be chosen on the inlet pipe (it is connected directly to the container). After that, the top plate and the second bubble type tube should be fixed. Valve number 2 is installed at the end of this tube.

When installing the second valve, the fitting must be fastened with sufficient rigidity. You will also need a clamping ring.

Ready-made version of the hydrogen burner

The next stage is the manufacture and installation of the shutter, after which valve No. 3 is screwed to the pipe. With the help of studs, it must be connected to the nozzle, while insulation must be provided by means of rubber gaskets.

Pure water (distilled) is a dielectric and in order for the electrolyzer to work with sufficient productivity, it must be turned into a solution.

The best performance is demonstrated not by saline, but by alkaline solutions. To prepare them, you can add baking soda or caustic soda to the water. Some household chemicals are also suitable, for example, "Mr. Muscle" or "Mole".

Device with galvanized board

A very common version of the electrolyser, mainly used in heating systems.

Having picked up the base and the container, they connect the boards with screws (4 of them are needed). Then an insulating gasket is installed on top of the device.

The walls of the container should not be electrically conductive, i.e. made of metal. If there is a need to make the container highly durable, you need to take a plastic container and place it in the same size metal shell.

It remains to screw the container with studs to the base, and install the shutter with terminals.

Model with plexiglass

The assembly of an electrolytic cell using organic glass blanks cannot be called a simple task - this material is quite difficult to process.

Difficulties can also lie in wait at the stage of finding a container of a suitable size.

In the corners of the board, one hole is drilled, after which the plates are mounted. The step between them should be 15 mm.

The next step is to install the shutter. As in other modifications, rubber gaskets should be used. Just keep in mind that in this design their thickness should be no more than 2 mm.

Model on electrodes

Despite the slightly alarming name, this modification of the electrolyzer is also quite affordable for self-production. This time, the assembly of the device starts from the bottom, strengthening the shutter on a solid steel base. The container with the electrolyte, as in one of the options described above, is placed on top.

After the shutter, proceed to the installation of the tube. If the dimensions of the container allow, it can be equipped with two filters.

• the sheet does not touch the container;
• the distance between it (sheet) and the clamping screws must be 20 mm.

With this version of the hydrogen generator, the electrodes should be attached to the gate, placing the terminals on the other side of it.

The use of plastic gaskets

The option of manufacturing an electrolyser with polymer gaskets allows the use of an aluminum container instead of a plastic one. Thanks to the gaskets, it will be securely insulated.

When cutting out gaskets from plastic (you will need 4 pieces), you need to give them the shape of rectangles. They are laid at the corners of the base, providing a gap of 2 mm.

Now you can start installing the container. To do this, you need another sheet in which 4 holes are drilled. Their diameter must correspond to the outer diameter of the M6 ​​thread - it is with these screws that the container will be screwed.

The walls of an aluminum container are stiffer than those of a plastic one, so for a more secure fastening, rubber washers should be placed under the screw heads.

It remains the final stage - the installation of the shutter and terminals.

Model for two contact terminals

Attach a plastic container to a base made of steel or aluminum sheet using cylinders or screws. After that, you need to install the shutter.

In this modification, a needle nozzle with a diameter of 3 mm or a little more is used. It must be installed in its place by connecting to the container.

Now, with the help of conductors, you need to connect the terminals directly to the bottom board.

The tube is mounted as the last element, and the place where it is connected to the container must be sealed with a clamping ring.

Filters can be borrowed from broken washing machines or you can install ordinary "mud collectors".

You will also need to fix two valves on the spindle.

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Schematic representation

A schematic description of the electrolysis reaction will take no more than two lines: positively charged hydrogen ions rush to the negatively charged electrode, and negatively charged oxygen ions to the positive one. Why is it necessary to use an electrolytic solution instead of pure water? The fact is that a sufficiently powerful electric field is required to break the water molecule.

Salt or alkali performs a significant part of this work chemically: a metal atom with a positive charge attracts negatively charged hydroxo groups OH, and an alkaline or acid residue with a negative charge attracts positive hydrogen ions H. Thus, the electric field can only pull apart the ions to the electrodes.

Scheme of the electrolyzer

Electrolysis works best in a solution of soda, one part of which is diluted in forty parts of water.

The best material for electrodes, as already mentioned, is stainless steel, but gold is best suited for making plates. The larger their area and the higher the current strength, the more gas will be released.

Gaskets can be made from a variety of non-conductive materials, but polyvinyl chloride (PVC) is best suited for this role.

Conclusion

The electrolyzer can be effectively used not only in industry, but also in everyday life.

The hydrogen it produces can be turned into fuel for cooking, or enriched with a gasoline-air mixture, increasing the power of car engines.

Despite the simplicity of the basic device of the device, the craftsmen learned how to make a number of its varieties: the reader can make any of them with his own hands.

Related video

This is a redox reaction that takes place only under the influence of electricity. In order to obtain hydrogen and oxygen, electrolysis of water is carried out. For the reaction to proceed, it is necessary to place two electrodes connected to a DC power source in the electrolyte:

• Anode- the electrode to which the positive conductor is connected;
• Cathode- the electrode to which the negative conductor is connected.

Below is a schematic diagram of an industrial alkaline electrolytic cell.

Under the action of an electric current, water is separated into its constituent molecules: hydrogen and oxygen. A negatively charged cathode attracts hydrogen cations, and a positively charged anode attracts OH - anions.

The demineralized water used in industrial electrolysis plants is itself a weak electrolyte, so strong electrolytes are added to it to increase the electrical conductivity. Often, electrolytes with a lower cationic potential are chosen to exclude competition with hydrogen cations: KOH or NaOH. The electrochemical reaction proceeding on the electrodes is as follows:

• Reaction at the anode: 2H 2 O → O 2 + 4H + + 4e − - release of oxygen;
• Reaction at the cathode: 2H 2 O + 2e − → H 2 + 2OH − - hydrogen evolution.

An industrial electrolyzer is assembled according to a bipolar scheme, where bipolar "intermediate" electrodes with different charges on the sides are placed between the main electrode and the cathode. On the side of the main anode, the intermediate electrode has a cathode side, on the cathode side - anode (see figure).

Further, in order to obtain pure hydrogen and oxygen, it is required to separate the gases formed on the electrodes, and for this, separating ion-exchange membranes are used (see figure). The amount of hydrogen produced is twice as much as the oxygen produced, and therefore the pressure in the hydrogen cavity rises twice as fast. To equalize the pressure in the cavities, a pressure equalizing membrane is used at the outlet of the electrolyzer, which prevents hydrogen from being squeezed into the oxygen cavity through channels designed for electrolyte circulation.

This method is the most used method in industry and allows to obtain gaseous hydrogen with an efficiency of 50 to 70% with a capacity of up to 500 m 3 /hour at specific energy consumption of 4.5-5.5 N 2 m 3 /kWh.

ELECTROLYSIS ON TPE

At present, electrolysis using solid-polymer electrolytes based on a perfluorinated ion-exchange membrane can be attributed to the most effective separation method.

This type of electrolyzers makes it possible to produce hydrogen with an efficiency of up to 90% and is the most environmentally friendly. Electrolyzers with TPE are 6-7 times more expensive than alkaline ones and therefore have not yet become widespread in industry.

Using the principle of obtaining hydrogen by electrolysis of an aqueous solution of alkali, I decided to make a simple and compact apparatus, convenient for working with small parts, when soldering with hard solders. Due to the small external dimensions of the electrolyser, it will find a place even on a small desktop, and the use of a standard rectifier for recharging batteries as an electrolytic unit facilitates the manufacture of the unit and makes it safe to work with.

The relatively small, but quite sufficient performance of the apparatus made it possible to extremely simplify the design of the water seal and guarantee fire and explosion safety.

Electrolyzer device

Between the two boards, connected by four pins, there is a battery of steel plates-electrodes separated by rubber rings. The internal cavity of the battery is half filled with an aqueous solution of KOH or NaOH. A constant voltage applied to the plates causes the electrolysis of water and the release of gaseous hydrogen and oxygen.

This mixture is discharged through a PVC tube put on the fitting into an intermediate container, and from it into a water lock, which are made from two empty cartridges for refueling gas lighters (cans of the Severny Press plant in Leningrad can be used). The gas that has passed through a mixture of water and acetone placed there in a ratio of 1: 1 has the composition necessary for combustion and, diverted by another tube into the nozzle - a needle from a medical syringe, burns out at its outlet with a temperature of about 1800 ° C.

Rice. 1. Water burner.

For the electrolyzer boards, I used thick plexiglass, 25 mm thick. This material is easy to process, chemically resistant to the action of the electrolyte and allows you to visually control its level in order to add distilled water through the filling hole if necessary.

Plates can be made from sheet metal (stainless steel, nickel, pickled or transformer iron) with a thickness of 0.6-0.8 mm. For ease of assembly, round recesses are squeezed out in the plates for the rubber seal rings, their depth with a ring thickness of 5-6 mm should be 2-3 mm.

Rings designed to seal the internal cavity and electrically insulate the plates are cut from sheet oil and petrol resistant or acid resistant rubber. It is not difficult to do this manually, but it will still be ideal to do it with a round cutter.

The four M8 steel studs connecting the parts are insulated with 10mm cambric and threaded into matching 11mm holes.

The number of plates in the battery is 9. It is determined by the parameters of the power supply unit: its power and maximum voltage - at the rate of 2 V per plate. The current consumed depends on the number of plates involved (the fewer of them, the greater the current) and on the concentration of the alkali solution. In a more concentrated solution, the current is less, but it is better to use a 4-8% solution - it does not foam so much during electrolysis.

The contact terminals are soldered to the first and last three plates. A standard charger for car batteries VA-2, connected to 8 plates, at a voltage of 17 V and a current of about 5 A, provides the necessary performance of the combustible mixture for the nozzle - a needle with an internal 0.6 mm. The optimal ratio of the diameter of the nozzle needle and the performance of the electrolyzer is established empirically - so that the ignition zone of the mixture is located outside the needle. If the productivity is low or the diameter of the hole is too large, combustion will begin in the needle itself, which will quickly heat up and melt from this.

A reliable barrier against the spread of flame through the supply tube inside the electrolyzer is the simplest water lock, which is made from two empty cartridges for refilling gas lighters. Their advantages are the same as those of the board material: ease of machining, chemical resistance and translucency, which allows you to control the liquid level in the water seal. The intermediate tank eliminates the possibility of mixing the electrolyte and the composition of the water seal in intensive operation modes or under the action of a vacuum that occurs when the power is turned off. And in order to avoid this for sure, at the end of work, you should immediately disconnect the tube from the electrolyzer. The fittings of the containers are made of copper tubes 4 and 6 mm, they are installed in the upper wall of the cans on the thread. Through them, the composition of the water seal is filled and the condensate is drained from the separation tank. An excellent funnel for this will come from another empty spray can, cut. in half and with a thin tube installed in place of the valve.

Connect the electrolyser with an intermediate container with a short 5 mm polyvinyl chloride tube, the latter with a water seal, and its outlet fitting with a longer tube with a needle nozzle (You can use a medical syringe with a needle as a nozzle). Inside the handle (syringe) is placed a fire-extinguishing packing - a brass mesh coiled into a spiral.

Rice. 2. Electrolyzer device:
1 - insulating PVC tube 10 mm, 2 - M8 stud (4 pcs.), 3 - M8 nut with washer (4 pcs.), 4 - left board, 5 - plug-bolt M10 with washer, 6 - plate, 7 - rubber ring, 8 - fitting, 9 - washer, 10 - PVC tube 5 mm, 11 - right board, 12 - short fitting (3 pcs.), 13 - intermediate tank, 14 - base, 15 - terminals, 16 - bubble tube , 17 - nozzle-needle, 18 - water lock body.

Turn on the rectifier, adjust the voltage or the number of connected plates to the rated current and ignite the gas coming out of the nozzle.

If you need more performance - increase the number of plates and use a more powerful power supply - with a LATR and a simple rectifier. The flame temperature is also amenable to some adjustment by the composition of the water seal. When it contains only water, the mixture contains a lot of oxygen, which in some cases is undesirable. By pouring methyl alcohol into the water lock, the mixture can be enriched and the temperature raised to 2600 ° C. To reduce the flame temperature, the water lock is filled with a mixture of acetone and water in a ratio of 1: 1. However, in the latter cases, one should not forget to replenish the contents of the water lock.

Yu. ORLOV, Troitsk, Moscow region
Posted by: Modeller Constructor

Such technology as water disinfection with sodium hypochlorite has been used for more than a hundred years. It is characterized by a sufficiently high efficiency and does not require large labor costs, therefore sodium hydrochloride is currently used in a wide variety of industries. With it, you can:

• disinfect water in pools and artificial reservoirs for various purposes;
• disinfect natural waters, which will then be used in the organization of household water supply;
• clean wastewater from hazardous pollutants.

Therefore, modern environmentalists successfully use electrolysis plants with sodium hypochlorite in their work. And if you are faced with the task of cleaning a large volume of water from microorganisms (regardless of its purpose), you should also pay attention to the technology in question.

It should be noted that disinfection with hypochlorite makes it possible to obtain sufficiently clean and transparent water, completely devoid of pathogenic bacteria and microorganisms. However, in the case of using the technology in question, it is necessary to take some details extremely seriously. In particular, if you are cleaning pools by disinfecting water with sodium hypochlorite, you should definitely monitor the content of active chlorine in the water, as well as the pH of the medium (ideal pH will be 7.6 - 7.8).

Want to take advantage of this versatile cleaning method? Then we recommend ordering sodium hypochlorite electrolysis plants from Ecocontrol S. We have the best quality equipment that purifies water very quickly, efficiently and safely. Moreover, we offer absolutely automated electrolyzers that do not require constant monitoring by a specialist.

As practice shows, with the help of disinfection with hypochlorite, very high water quality indicators can be achieved. However, this requires good equipment. And if you want to purchase it, hurry up to become a client of our company - we offer only certified products and are able to guarantee their excellent quality and work efficiency.

OSEC ® L - WALLACE & TIERNAN ® electrolysis systems.

OSEC ® L system generates sodium hypochlorite solution<1,0% через электролиз рассола, потребляя только воду, соль и электричество. Производительность до 400г/час. Полностью автоматизирована и укомплектована для быстрой установки, безопасной работы и простого обслуживания.

The OSEC® BP system produces a 0.8% sodium hypochlorite solution by electrolyzing brine using only water, salt and electricity. The system is fully automated, making it ideal for operation without constant operator supervision. Wall mounting. Available in four standard capacities ranging from 5.5 to 22 kg/day.

OSEC® B-Pak. The electrolysis system generates a 0.8% sodium hypochlorite solution by electrolyzing brine using only water, salt and electricity. On-site and on-demand production of hypochlorite eliminates the problems associated with transporting and storing liquefied chlorine or commercial sodium hypochlorite solutions. Capacity up to 5 kg/h.

The OSEC® B-PLUS system produces a 0.8% sodium hypochlorite solution by electrolysis of brine using only water, salt and electricity. OSEC® B-Plus is fully automated and packaged for fast installation, safe operation and easy maintenance. Modules are shipped pre-tested for faults, fully wired and wired. Productivity up to 40 kg/h (increase in productivity is possible).

Map with a list of objects using electrolysis plants of the OSEC type (supplied by Ecocontrol S LLC)

Industrial water electrolyzers - plants for the electrolysis of water and waste water

A special industrial electrolyzer producing a 0.8% sodium hypochlorite solution can be used in the operation of a wide variety of industrial facilities, as well as public facilities. This is a highly efficient equipment used for the disinfection of drinking and waste water, fountain and pool water, natural water, etc. Moreover, electrolyzers can be very different, and often even modern membrane technologies are used in them.

For what purposes are they used?

With the help of the considered equipment it is possible to carry out:

• disinfection of drinking water,
• wastewater treatment;
• industrial water treatment;
• water treatment in fountains;
• pool water treatment.

At the same time, electrolysis of water will cost you much less than using ready-made sodium hypochlorite.

The essence of the work of modern electrolyzers

How do water electrolysis plants work? Today, they are used to produce chlorine and caustic by electrochemical method, which are then used to disinfect water. Moreover, sulfonic cationite membranes are most often used in such devices, which, due to their main features, make it possible to obtain high-quality reaction products, ensuring the efficiency and stability of the water purification process. And if you carry out wastewater electrolysis using such devices, you can count on the best end result.

Technology Benefits

Next, you need to talk about the advantages that modern industrial water electrolyzers have, and which allow this particular equipment to become more and more popular every year. These advantages include:

• financial availability, safety and simplicity of the cleaning method;
• lack of dependence on companies that are suppliers of sodium hypochlorite;
• the ability to disinfect not only water, but also water pipes;
• complete dissolution of reagents in water (due to the use of water electrolysis technology, you get the so-called "chlorine" water);
• prevent the appearance of any pathogenic bacteria, harmful fungi and algae in the water;
• complete removal of organic impurities.

Thanks to all these advantages, water electrolysis plants are very actively used in our time by a wide variety of civil, industrial and municipal facilities. And if you're also in need of highly efficient and affordable water treatment equipment, be sure to check them out. Moreover, it is best to order all devices for the electrolysis of wastewater, water from fountains, pools and other artificial reservoirs, as well as household water, from Ecocontrol S. Our staff will competently select the best equipment for you, give professional advice, help set up and adjust the devices, provide warranty and service. And all this on the most favorable terms!