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Osmosis Su Teknolojileri
Products

Media Filters

Sand, activated carbon, iron–manganese and dolomite filters, plus filter media.

Media filters treat water by passing it through a bed of filter media. The bed itself does the retaining; when it becomes saturated it is cleaned by backwashing and returned to service.

Which medium is used depends on the type of contamination in the water: suspended solids, chlorine and organics, iron–manganese or a need to correct pH each call for a different bed.

Product group

  • Sand filter

    Sand filter

    Removal of suspended solids and turbidity. The most common first stage in treatment lines; a graded sand–gravel bed provides depth filtration.

  • Activated carbon filter

    Activated carbon filter

    Removal of free chlorine, taste, odour and organic matter. The most common way to remove chlorine ahead of reverse osmosis — membranes have a low tolerance to chlorine.

  • Iron–manganese filter

    Iron–manganese filter

    Oxidation and retention of dissolved iron and manganese in well water. The principal remedy for red–brown colour and sediment complaints.

  • Dolomite filter

    Dolomite filter

    Used to raise the pH of acidic water and correct its hardness balance. Particularly useful for stabilising the aggressive water leaving a reverse osmosis unit.

  • Filter media

    Filter media

    Quartz sand, gravel, anthracite, activated carbon and special media. We supply media for bed replacement in existing filters.

The backwash setting determines how long the media lasts

A media filter’s performance depends as much on its backwash setting as on the type of media. Under-washing compacts the bed and opens channels — the water finds a short cut instead of passing through the filter. Over-washing carries the media out of the line.

The correct backwash flow rate and duration are established during commissioning and reviewed at periodic inspections. Without that adjustment, a filter is correct on paper and useless in the field.

Frequently asked questions

How often is the media replaced?

It depends on operating conditions. If differential pressure no longer drops after backwashing and outlet quality is not holding, the bed needs replacing.

Does activated carbon remove all of the chlorine?

With the correct contact time and bed depth it removes the great majority of free chlorine. Free chlorine should be measured at the outlet before reverse osmosis.

Do you carry out media replacement in our existing vessels?

Yes. We empty the bed in existing columns, install new media and recommission the unit afterwards.

Related

The systems these products go into

Send us your raw water analysis and the flow rate you need

Let us size the system together; we will survey the site in person if needed.

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