Size:  3/8” x ¼”, 4 x 8, 8 x 40, 14 x 4, various other screen sizes

The crystal structure of clinoptilolite contains channel ways or windows that allow the passage of air through the mineral. The channel ways or “windows” also lead to “cages” or positions in the crystal lattice. These cages will capture and hold certain size cations such as ammonium.

In a typical zeolite filter air is passed through a bed of zeolite and it retains the impurities. Depending on the impurities it can be cleaned or regenerated by certain methods that may include heating, washing with a saline solution, exposing to sunlight, etc. These filters can consist of a layer of zeolite held between screen layers. Alternatively, they can be a non-woven polyester impregnated with finely ground zeolite.

In other systems, the zeolite in the air filter is surface modified, and is called a “surface modified zeolite” (SMZ). The modifier can be a quaternary amine, oxidant such as potassium permanganate, or various other substances. Some of them can be regenerated and others such as potassium permanganate are consumed.

In another system commonly known as a “biofilter” the gas to be purified is passed through a bed of zeolite that contains various bacteria. The temperature, moisture, and nutrients must be controlled. Here the gas is consumed by the bacteria.

BIO FILTER