Deferrization Plants
TheDeferrization plant uses a mechanical-physical process on the removal of iron, which is considered a contaminant element, suspended or dissolved in a liquid.
The chemical transformation from soluble (Fe++) to insoluble (Fe+++) state occurs through anoxidizer, and allows this substance to precipitate and filter out.
Iron removal achieved in this way avoids clogging pipes and compromising ion exchange resins, which are installed on softening systems.
Therefore, this operation is often identified as necessary in industrial water pretreatment.
Coind deferrization plants include several technologies to carry out this operation.
The iron removal process is distinguished by the presence of filter material, specifically quartz or manganese dioxide, and an oxidizer, which is properly dissolved in the fluid.
How the Deferrization Process Works
The fluid is conveyed to a filter bed, consisting of quartzite, oxidizing mass, and inert material.
Potassium permanganate or manganese dioxide, combined with quartzite, can be used to oxidize and filter.
In the former case, the substance can be inserted continuously or discontinuously, depending on the size of the system and the possible presence of manganese in the fluid.
In the second case, often identified as the optimal choice because of the greater availability and affordability ofsodium hypochlorite, placed upstream of the filter, theoperation is carried out with a selection and activation of material, later mixed with quartzite.
Careful selection of particle sizes is used in order to avoid separation at the backwash stage.
Details on the facilities
of Water Deferrization
When Deferrization is applied
These types of plants typically are used to treat well water to make it suitable for drinking orindustrial use.
Filtered substances
- Iron
- Iron and Manganese
What happens chemically
In the step of passing the fluid over the oxidizing mass,break down of iron and manganese occurs, which become insoluble, then precipitate and are filtered out.
This occurs according to this process (Mn2+→ MnO2, Fe2+→ Fe(OH)3).
Automated regeneration
Combining manganese dioxide with hypochlorite allows for a self-regenerative backwash, according to which iron hydroxides and excess amounts of precipitated substances are removed.
The appropriate ph
The most suitable pH to carry out this process is between 6.5 and 8.5.
The reason lies in solubilization, which is triggered below pH 6 by oxidized manganese and manganese dioxide.
