Water and air filtration

Laterlite is an excellent medium for various types of filtration and purification system:

WATER

• In waste water treatment systems
• In water potabilisation treatment systems (tertiary treatment for drinking water)

AIR

• In odour reduction systems

WATER FILTRATION MEDIA

Laterlite Expanded Clay is successfully used for water filtration in potabilisation plants and for wastewater purification, often associated with sand in dual media filtration systems.

Some of the main advantages are:

• it provides a large surface area for filtration because of the intergranular and intragranular porosity of expanded clay
• it provides ideal conditions for development of the biofilm (consisting mainly of bacterial colonies) in which the process of biological purification actually takes place, because of the dense network of cavities within the expanded clay granules
• its durability. For all practical purposes, expanded clay is an everlasting material that does not rot, does not degrade over time, and resists acids, bases, solvents, and freeze/thaw cycles with no chemical or physical alteration.
• it is extremely easy to lay and maintain because of its lightness and its suitability for pumping.
• its low and controlled density means that pump filters are easy to clean (by backwashing) thereby enabling pumps of lower power to be used.

ODOUR CONTROL MEDIA

Laterlite Expanded Clay is an excellent granular medium for use in biofilters, bioscrubbers, and packed towers (air biofiltration) that eliminate the airborne odours emitted by wastewater treatment plants, sewage treatment plants, industrial processes, and effluents.

Because of its dense network of cavities and its ability to retain moisture, Laterlite Expanded Clay is in fact the ideal support for the growth of the microorganisms that reduce biological odours.

Because of its resistance to crushing and to acids, bases, solvents, microorganisms, insects, and freeze/thaw cycles, the excellent durability of Laterlite Expanded Clay far exceeds that of alternative odour control systems based on organic materials such as wood chip, shells, or peat/heather.