Filtralite - Leca Norge ASFiltralite
Filtralite is the registered trademark for all expanded clay products used as filter media that are manufactured by Leca Norge AS in Norway. Filtralite materials are made of lightweight expanded clay aggregates. The unique porosity and structure give the grains properties used for many purposes, including water filtration. Whether you live in Cairo, Chicago or Copenhagen, there is an increasing influx of people to the big cities. Demographic changes and urbanisation across the globe put a strain on cities and their capacity to produce basic necessities such as drinking water. With its unique porosity, Filtralite Pure and Clean filter media offers optimum conditions for water to flow through the filter bed in order to retain and adsorb more contaminants.
This feature 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.
Our products not only increase water output volumes, they also decrease operation costs. By replacing conventional sand filters with Filtralite filter media, you can expect to get your money back in less than 3 years.
Because Filtralite Pure and Clean filter media requires fewer backwashes, which means less energy and less water loss, which at the end of the day means more water out of your plant. This way, we ensure you get more out of the resources you already have.
As cities are gearing for the future, Filtralite Pure and Clean filter media is an innovative and premium filtering product tailored to meet tomorrow’s needs.
Filtralite filter media are used for a number of water treatment applications; such as drinking water treatment, wastewater treatment and on-site treatment of effluent water.
Research and Development
The development of Filtralite filter media is carried out in close cooperation with universities and research institutes both in Norway and worldwide. Many doctoral and master thesis, reports and papers have been written on various aspects of the use of Filtralite for drinking water and wastewater treatment.
Filtralite filter media is made by the burning of clay at about 1200º C, followed by crushing and sieving of the resulting expanded, clay pellets. The material has a very porous structure, and crushing exposes large surface area. Dry particle densities are in the range 500-1,600 kg/m³, and the aggregate size range is 0-20 mm. Filtralite materials are flexible and can be 'tailor-made' for specific applications. The aggregates do not release any harmful substances and the acid solubility is minimal. Despite its low density and high porosity, Filtralite has high abrasion and impact resistance.
Leca Norge AS takes responsibility for our environment that provides us with the materials we use to create Filtralite products.
Reduction of emissions is a high-priority environmental factor
Controlling and limiting our energy consumption is an important issue, as production of lightweight expanded clay aggregates requires a great deal of energy. ISO 14001 is implemented in the entire Leca organisation in Norway, where Filtralite is produced. By working systematically with this norm, ambitious measurable environmental targets can be established and evaluated.
Transport & delivery
Leca Norge AS has a lot of experience with transporting and delivering Filtralite to almost all parts of the world. Delivery method varies from project to project, subject to the customers needs and the type of media. Most types of material qualities can be delivered in bulk or in big bags, with road or sea transport.
By using tank trucks with blowing equipment, the Filtralite products can be pneumatically discharged directly into the plant filters. Filtralite Nature P, Filtralite Pure NC 0,8-1,6 mm and Filtralite Pure NC 1,5-2,5 mm are not recommended for pneumatical discharge.
Delivery in big bags can be done for all applications and all Filtralite products. Big bags that are open at the top will normally be used. Most of the materials are normally delivered in 1,5 m3 big-bags. For deliveries to on-site wastewater treatment systems, the material is delivered in 1,0 m3 big bags. The big bags can be transported on trucks, trains or boats, or they can be stuffed into containers. Transport in containers is a good solution for smaller volumes and long sea transports.
During delivery of Filtralite, it can sometimes be necessary to temporarily store the material. Filtralite filter medias can be stored outdoors without decrease of quality. It should be taken into consideration that the materials will absorb water during rainfalls, which will make the media heavier and may increase transport costs. To avoid degradation of the big bags they should not be stored outdoors for more than 6 months.
Filtralite Nature P should not be stored outdoors, as rainfall may wash out parts of the material, which may result in reduced efficiency of the media.