Drum Filter

What is it?

They are mesh filters with very small openings (microns), mechanical and self-cleaning, designed to filter large volumes of water where the removal of particles (suspended solids) is essential.

Developed and manufactured in Sweden by their inventor Nils- Åke Persson (NP), they are definitely the world leaders in this technology with more than 5,000.- of these devices operating around the world.

Main features

The water flows by gravity from the inside of the Drum (at rest) to the outside, leaving the particles and solids retained in the micro mesh of the filter panel. With a pressure drop of only 300 mm. (maximum).
The exclusive design of its panels with squared cells, prevent the movement of the solids with the movement of the Drum, causing them to be removed without destroying the particles.
On the other hand, its squared design allows the simple repair of the panel in case of breakage, inserting a plug in the broken cell.

The Rotary Drum Filter is a very versatile equipment, being able to vary the openings of the filter meshes from 20 to 250 microns, just by changing the filter panels. This allows to perfect the water filtration to the needs of the Company or to change the destiny of the equipment.
The multiple designs and sizes allow to treat flow rates from 10 to 900 liters per second (from 36 to 3,240 m3 / h) in a single unit.


  • 2000 mm diameter.
    Sizes: 5, 6, 7, 8, 9 and 10 filter sections.
  • 1600 mm diameter.
    Sizes: 4, 5, 6, 7, 8, 9 and 10 filter sections.
  • 1200 mm diameter.
    Sizes: 1, 2, 3, 4, 5, 6, 7 and 8 filter sections.
  • 800 mm diameter.
    Sizes: 1, 2, 3 and 4 filter sections.
  • 600 mm diameter.
    Only 1 filter section.


Inlet water filtration

  • Cellulose industry.
  • Fish farming (fresh and sea water).
  • Egg Incubation

Wastewater and Effluent Filtration

  • Wastewater from Cellulose.
  • Fingerling production sewage.
  • Effluents from agricultural production.
  • Final polish Sewage Treatment Plants

Water reuse

  • Recirculation of water in the aquaculture industry (Fresh and Sea Water).
  • Reuse of water from food production process.
  • Reuse of water in the horticultural industry.

Biolight has more than 29 years of experience in the design of civil works for the correct installation of this equipment, we provide permanent field support and stock of spare parts always ready for your requirements. Biolight is the official representative of NP Innovation.

Do you want to quote a project for water treatment?

We provide our clients with the necessary platform for its implementation.