Dŵr Cymru Welsh Water’s Hirwaun water treatment works is a small works (5Ml/d) which treats raw water from the Penderyn upland reservoir. Treatment is by coagulation with ferric sulphate and lime, flocculation and clarification by DAF. The clarified water is dosed with lime and this is followed by first stage filtration in four rapid gravity filters, intermediate electrochlorination and orthophosphoric acid dosing, and second stage filtration in four pressure filters. Final disinfection is by electrochlorination. The original electrochlorination plant was an Evoqua OSEC® packaged unit installed over twenty years ago and had reached the end of its asset life.

A large UK private utility company responsible for providing public water supply and wastewater treatment to the majority of southern England recently approached Xylem to enquire about what it could offer to improve or restore the performance on their Sanitaire fine bubble diffused aeration systems.

Faced with high standards for both efficiency and sustainability, Averdung and the municipal utility sought a partner capable of realizing this supply through seawater source heat pumps using Baltic Sea water.

EMASESA (Empresa de Abastecimiento y Saneamiento de Aguas de Sevilla S.A.) is responsible for water cycle management in the Spanish city of Seville and its metropolitan area. The utility supplies approximately 100 hm3 of drinking water to 1.4 million residents in 12 municipalities every year, as well as distributing raw water to 31 municipalities, serving a total area of 1,220 km2. It manages a 4,000 km network, six water reservoirs, 35 pumping stations...

This guide, developed in partnership with AWWA, explores how utilities can adopt data-driven pipeline management strategies and features real-world utility success stories. Learn more about assessing pipelines and leveraging data to prioritize and address risk.

At the start of 2021, the plant registered a decrease in air flow, accompanied by an increase in energy consumption by the blowers. Personnel suspected that the diffusers were clogged by calcium carbonate build-up from the water, causing significant head loss in the diffusers.