H Hydrex™ Comprehensive range of water treatment chemicals to suit all water treatment needs. Sludge treatment Hydrex™ Biocides Hydrex™ offers a range of biocides for many applications. Sludge treatment Hydrex™ Other Water Treatment Chemicals Hydrex™ offers solutions for each specific requirement in terms of chemical water conditioning, including tailor-made formulations. Sludge treatment W WHITTIER FILTRATION AutoFlot® Veolia’s AutoFlot is an adaptable and affordable IGF technology designed to provide high performance and greater throughput capacity for the treatment of highly entrained streams that require intensive aeration. Clarification and Flotation