Wastewater treatment is an overlooked lifesaver. While the medical advances of the last 100 years—penicillin, chemotherapy, and, more recently, mRNA vaccines—have transformed healthcare, keeping our water supplies free from pathogens like cholera and dysentery, has saved many more lives. The systems developed to treat wastewater are so successful that we can afford to flush and forget.

But this is infrastructure we must not overlook. Growing populations, increased use by industry, and regulations that get tighter as we learn of new threats to human life and the environment, are putting wastewater treatment facilities under strain. Existing plants are often tucked away on constrained sites, and work as part of a sprawling network of sewage systems that make it extremely difficult for them to be relocated.

This is very much the case at Ringsend in Dublin. Here, on a site bounded by other facilities and the sea, the waste produced by millions of Dubliners—and the city’s industry and commerce—must be processed before being discharged into the Liffey Estuary. To update the plant, its owners had considered building a 9km pipe to discharge waste outside of the sensitive areas of the estuary.

But a new solution was identified. By implementing a novel form of biological treatment, developed by Haskoning, Egis was able to ensure that the effluent discharged was so clean, it would be safe for wildlife. But installing this would take careful planning and scheduling, in order to complete the work in tight constraints, without any pause in plant operations.

Guests

Marisa Buyers-Basso, associate director, Haskoning

Marcus Fagan, chartered engineer, Egis

Partner

Egis is a leading global architectural, consulting, engineering, operations and mobility services firm with 22,000 employees across more than 100 countries. The company designs and operates intelligent infrastructure and buildings that both respond to climate emergencies and contribute to balanced, sustainable and resilient development. 

Egis has operated in Ireland since 1994 and is the largest multi-disciplinary consultancy, engineering and operations firm in the country. Its current activities in Ireland include operating the Dublin Tunnel and the Jack Lynch Tunnel in Cork, overseeing 1,200km of Ireland’s motorways. It is also active in the design and delivery of major transportation programmes, renewable energy and water and waste water projects. With over 600 staff in Ireland across 16 offices and sites nationwide, it is committed to enabling sustainable economic development and responding to the requirements of population growth while addressing climate change and reducing carbon emissions. 

The post #356 Making Space for Wastewater Treatment first appeared on Engineering Matters.