With its unique porosity, Filtralite® Pure filter media offers optimum conditions for water to flow through the filter bed in order to retain more contaminants. This feature, main characteristic of the lightweight expanded clay material, allows for larger volumes of water to be filtered through the same volume as contact area is increased.

Water management facilities can thereby increase their output without having to rebuild and expand existing facilities simply by replacing the conventional filtering media with Filtralite products.


Filtralite® in mono and dual granular media filters for an improved physical filtration

Filtration of water is the most traditional type of water treatment. Filtralite has the ideal properties to work as a good filter media in both mono and dual media filters for filtration of raw or coagulated water. 

Compared to traditional filter media like sand and anthracite, Filtralite has much higher porosity, which gives

  • lower initial head loss,
  • slower head loss build up,
  • higher storage capacity,
  • and lower backwash rates.

These advantages result in much longer filter runs between backwashes, which means reduced energy and water consumption and higher water production, consequently giving reduced operating costs. 

Filtralite solutions can be implemented in mono media filters, as well as in in dual media solution (Filtralite Mono-Multi and Filtralite Mono-Multi Fine) in which two types of Filtralite Pure filter media with different densities and sizes are combined, improving even more filter runs and production capacity.

Filters with Filtralite can be operated within a large range of filtration rates. The filtration rate will always be dependent of the configuration of the filter and the treatment process. Existing Filtralite filters operate from up to around 20 m/h.


Filtralite® as a biofilm carrier in fixed bed water treatment process

Filtralite Pure is also excellent for treating, in fixed bed water treatment process, raw water containing ammonia, manganese, iron etc.

Compared to other media, Filtralite has much higher porosity, which gives

  • great specific area for biofilm growth,
  • high number of macropores,
  • lighter density,
  • and high resistance to abrasion.

Existing biological Filtralite filters operate up to 30 m/h.