Treatment Plant Maintains Service During Infrastructure Upgrade Using Xylem Rental Bypass

To move forward with long-overdue infrastructure upgrades, Nodra AB needed a wastewater bypass solution capable of lifting up to 3,000 liters per second into its Slottshagens treatment plant. Xylem’s Rental Solutions team set up a turnkey wastewater bypass station in a little over three weeks. Through dedicated service personnel and remote, digital monitoring and control, Xylem provided 24/7 operational support throughout the 10-week bypass.

The Slottshagens Reningsverk treatment plant, serving the city of Norrköping, Sweden, and the surrounding area, receives about 45 million liters of wastewater every day. In 2022, the plant’s inlet station required an extensive concrete renovation. Nodra AB partnered with Xylem to plan and install a major bypass to redirect water from the inlet station.

“What we have to bear in mind here is that this system is not allowed to fail,” says Roger Allen, Project Manager, Nodra. “We cannot switch this off. We’re not allowed to switch this off.”

To ensure that the Slottshagens treatment plant could continue operating without compromising safety, a 70-meter-long pipe bridge was constructed over the entire building. Adding to the complexity of the bypass, the pumping solution also needed to account for varying flows during the daytime and nighttime.

“While we are accustomed to delivering large, turnkey solutions, the scale and scope of this project is in a whole new dimension,” says Adam Drakeley, Xylem Europe’s Senior Applications Engineer. “Even seasoned municipal engineers will tell you that diverting an entire city’s combined rain and wastewater over a 70-meter pipe bridge is no mean feat. Meticulous hydraulic, construction and electrical planning was key.”