Application
MULTIMAN 2N filtration bed consists mainly of cryptocrystalline silica. It has very wide specific surface, much larger than the quartz sand. MULTIMAN 2N is used as a filler in many kinds of filters: gravitational [open and closed], pressure; it is used for treatment of water with high iron and ammonium ion content. Used together with MULTIMAN 3M catalytic bed it forms a multilayer [one / multiple stage filtration] / multistage [two stage filtration] system for raw water deironing, demanganising and ammonium ion removal, and thanks to high porosity it may be also used to remove colloidal structures causing raw water turbidity.

Functioning
MULTIMAN 2N filtration bed is used as the first filtration layer used for suspension (e.g. oxidised iron) holding, thanks to its large internal surface being great environment for the bacterial microflora helping in ammonium ion/ammoniac oxidising – nitrifying bacteria. Thanks to the density difference comparing to MULTIMAN 3M, the filtration layers do not mix during the process. High porosity extends the filtering cycle and accelerates the process.

Technology
Bed height (filtration layer thickness) and filtration speed is adjusted on the basis of raw water physical and chemical parameters.

Product features
- Thanks to the large specific surface the filtering cycle extends, which brings economical profits.
- High tolerance for contaminations condensation changes in the fluid.
- Easy applicable in the existing filtration systems, in operating water treatment stations without necessity of their reconstruction.
- High weight capacity.
- Natural product.
- Possibility of increased filtration speeds.