Sand Filtration For Drinking Water

BW is a continuous sand filter developed in collaboration with customers and is used, among other things, to filter and produce drinking water. Contact filtration on this type of filter is characterized by precipitating chemicals (aluminum chloride) added to the water so that flecks are formed in the sand filter which retain both organic and inorganic particles. The treatment is particularly suitable for reducing humus and/or iron, and normally gives a color number of less than 5 mg Pt/L and turbidity lower than 0.1 FTU. Filter sand is continuously washed out into the drain, thus avoiding maturing water. Since the sand is constantly in motion, it requires high-quality materials to avoid wear and tear. This type of filter solution is installed all over the world, and in many Norwegian municipalities. In collaboration with the manufacturer, Unik has the experience and equipment necessary to meet the customer’s requirements and expectations.