D Dusenflo™ Gravity Filter Since 1948, Veolia Water Technologies Canada has developed an expertise second to none in water and wastewater treatment. Among the numerous processes that the company offers to meet various treatment objectives, the Dusenflo™ gravity filter has proven to be an efficient and reliable filtration system. Filtration H Hydrex™ Comprehensive range of water treatment chemicals to suit all water treatment needs. Sludge treatment Hydrotech™ Drum Filters Patented mechanical self-cleaning drum filter for municipal and industrial recovery water applications. Filtration M Mangaflo™ Mangaflo™ is a manganese and iron removal treatment process of water for human consumption. Filtration