water treatment in Iran, and also any other regions fall in below categories:

water treatment iran

Scale inhibitor

Scale is the accelerate that shapes on surfaces in contact with water as a result of the precipitation of ordinarily solvent solids that gotten to be insoluble as temperature incrementsA few cases of scale are calcium carbonate, calcium sulfate, and calcium silicate. Scale inhibitors are surface-active contrarily charged polymers. As minerals surpass their solubility’s and start to combine, the polymers gotten to be joined. The structure for crystallization is disturbed and the arrangement of scale is avoided. The particles of scale combined with the inhibitor will than be scattered and stay in suspension. Examples of scale inhibitors are phosphateesters, phosphoric corrosive and arrangements of moo atomic weight polyacrylic acid.

Oxygen scavengers

Oxygen scavengers imply anticipating oxygen from presenting oxidation responses. Most of the actually happening organics have a marginally negative charge. Due to that they can assimilate oxygen particlessince these carry a somewhat positive charge, to avoid oxidation responses from taking put in water and other liquids. Oxygen foragers incorporate both unstable items, such as hydrazine (N2H4) or other natural items like carbohydrazine, hydroquinone, diethylhydroxyethanol, methylethylketoxime, but too non-volatile salts, such as sodium sulphite (Na2SO3) and other inorganic compounds, or subordinates thereof. The salts regularly contain catalysing compounds to extend the rate of response with broken down oxygen, for occurrence cobalt chloride.

Corrosion inhibitors

In regard to water treatment in Iran another material is corrosion inhibitor:

Corrosion is a broad word that shows the conversion of a substances like metal into a soluble compound.
Corrosion may result in failure of critical parts of boiler systems, total loss in efficiency, deposition of corrosion products in critical heat exchange areas.
This is the reason of frequent application of corrosion inhibitors . Inhibitors are chemicals that react with a metallic surface, giving the surface a specific amount of protection. Inhibitors work by adsorbing themselves on the metallic surface, protecting the metallic surface by creating a protective film.

There are five various types of corrosion inhibitors:

1) Passivity inhibitors (passivators). These lead to a shift of the corrosion potential, forcing the metallic surface into the passive range. Oxidizing anions, such as chromate, nitrite and nitrate and non-oxidizing ions such as phosphate and molybdate are of examples of passivity inhibitors. The inhibitors are the most impressive and consequently the most widely utilized.

2) Organic inhibitors. Such category of inhibitors affect the whole surface of a corroding metal when present in specifics concentration. Organic inhibitors protect the metal by creating a hydrophobic film on the metal. Organic inhibitors will be adsorbed based on the charge on the surface and the ionic charge of the inhibitor.

3) Cathodic inhibitors. Several cathodic inhibitors, like compounds of arsenic and antimony, act by making the discharge and recombination of hydrogen more difficult. Other cathodic inhibitors, ions such as calcium, zinc or magnesium, might be precipitated as oxides to form a protective layer on surface of the metal.

4) Precipitation inducing inhibitors. These compounds cause the creation of precipitates on the surface of the metal, therefore supplying a protective film.
The most prevalent inhibitors of such product family are silicates and phosphates.

5) Volatile Corrosion Inhibitors (VCI). These are compounds transported in a closed environment to the site of corrosion by volatilisation from a source. Hydrazine and morpholine and and volatile solids such as salts of dicyclohexylamine, cyclohexylamine and hexamethylene-amine are of examples. The vapour of these salts condenses as result of contact with the metal surface, and is hydrolysed by moist, to liberate protective ions.


Normally aluminium and iron are applied, aluminium as Al2(SO4)3- (aluin) and iron as either FeCl3 or Fe2(SO4)3-.

When it comes to speak about coagulants, ions with positive charges with high valence are preferable.

One can also apply the relatively cheap form FeSO4, on condition that it will be oxidised to Fe3+ during aeration process.

Coagulation depends on the doses of coagulants in a high level, the pH and colloid concentrations. To adjust pH levels Ca(OH)2 is applied as co-flocculent. Doses usually is variable from 10 to ninety mg Fe3+/ L, but in presence of salts, higher doses should be used.


You may ask what is exactly foam? what is the reason of formation?

Actually, mass of bubbles created when certain types of gas are dispersed into a liquid this process creates foam. Strong films of liquid than surround the bubbles, creating high amount and volumes of non-productive and undesired foam.
The main formation sources of foam is a complicated study in physical chemistry, but it is already known that its existence causes major problems in both the operation of industrial processes and the quality of finished products sent to end users. When it is out of control, foam can reduce the equipment capacity and increase the duration and costs of processes.

Our products known as anti-foam blends contain oils combined with small amounts of silica. They break down foam thanks to two of silicone’s properties: incompatibility with aqueous systems and ease of spreading. Antifoam compounds are supplied either as powder or as an emulsion of the pure product without any other mixed material.

Reverse Osmosis membranes

different membrane structures need periodic cleansing and servicing. For ultimate overall performance particular chemical compounds are required, relying on the reason of the pollution.

Scaling is involved with the seclusion of suspended inorganic particles, such as calcium carbonate, barium sulfate and iron compounds.

Fouling is involved with the seclusion of organic, colloidal and suspended particles. Bacteria and other microorganisms that decompose these particles will create substrates. As a end result they will grow and advance further.

The tactics that are cited above will purpose a decrease in capability and/or an increase of the stress and, as a result, of the energy use.

It is very necessary to purify the membrane preventively. In many instances everyday moderate cleansing is higher than cleansing periodically with an aggressive cleansing product. The membrane will than remaining longer.

Water treatment industry

The importance of the water and wastewater industry is not overlooked. Water consumption in both industrial and municipal drinking water has always been considered. Consider the importance of water in the industry for the advancement and proper functioning of the industry. Many industries depend on the water and wastewater industry:

– air conditioning
– Production of products (such as clothing and food)
– Rinsing in industries like beverages and …
– Transportation of raw materials (in iron smelting and cane factories)

Also, given the varying variables of water consumption in various industries, depending on the technology of that industry and …, the major uses can be classified as follows:

– Heat transfer in industry
– Mechanical affairs
– Manufacturing and product systems
– Steam Generation and etc.

When it comes to talk about water consumption, in addition to the advantages, in certain cases, such as when emulsion is formed, may also cause damage such as puddles due to suspended and unsolved particles. This water outflow from industrial processes undergoes changes that can have a physical, chemical or biological aspect. Water mixing with oil and grease, the suspension of particles in water, the dissolution of the gas phase in water or dust, and so forth.

In many cases, water utilities managers are pushing to reduce consumption, including more water savings for the agriculture sector, lower costs for treatment plants and chemicals, reduced sewage volume Production, and so on. The re-circulation of water is one of the concerns of the experts in the field for several years.

Besides drinking water and industrial wastewater, urban drinking water is as much important as previous items.

Urban drinking water is treated in stages, which involves the mixing of water with chlorine for the purpose of disinfection, and the growth of algae can be controlled. In the second step, the air is supplied to the liquid so that the pollutant gases are removed from the system and the oxygen level is also increased in water. In the third stage, this water stays stagnant so that most of the contaminants are deposited. The remaining wastewater will eventually be sent to another place for agricultural use. Now, to complete the effect of this sedimentation process, the liquid must pass through fine meshes and add disinfectants. In step 4, it forms the basis of the activity. Now using products such as coagulant aid, the remaining fine particles are also heavier and separated from water. Ultimately, water filtering is very important. Filters, such as sand filters, separate fine particles. The explanation is that it is not always possible to say that the water treatment is done in the same manner and number of steps.

But for the purification of industrial and municipal water, various products are produced and supplied by Mehtash Sepahan Company.

– Water treatment chemicals. Cooling systems
– Chemical Desalination Systems
– Boiler chemicals
– Specialty chemicals for sewage treatment

The first group includes water purification chemicals for cooling systems:

– Antiscalant – Anticorrosion
– Anticorrosion
– Biocides
– Disparent – Biodispensant
– Antifoam

The next group includes:

– Anti-scalant (thermal desalination units and RO)
– Membrane cleaner
– Biocide and RO disinfectant

And the third category is boiler specific chemicals:

– Oxygen Scavenger
– Anticorrosion and antifouling
– Enhancement of alkalinity
– Anticorrosion lines of condensation
– Anti-foam

Finally, the final category is related to sewage treatment:

Anionic and cationic polyethylene electrolytes