Sand and gravel - Import export

Whave for sale following fractions: 5-8 mm, 8-11 mm, 8-16 mm, 11-16 mm, 0-16 mm. 0-32 mm, 16-64 mm and 16-32 mm. Pls. ask for offer

Ultrafiltration of surface water For separation of dissolved substances, ultrafiltration is applied apart from conventional pre-filters (sand and gravel filters). So, all solids and even bacteria, viruses, germs and colloidal components (iron, orthosilicic acid) are retained.