Evoqua selected by Severn Trent Water for water treatment


Evoqua Water Technologies announced it has been selected by Severn Trent Water and its design and construction partner, Costain, for water treatment system.

Under this agreement, Evoqua will supply its  CoMag ballasted clarification system to reduce phosphorus at the Finham Sewage Treatment Works in Coventry.

Peter Sugden, programme manager for Severn Trent Water, said, “We are saving a significant amount of money by reusing existing but redundant sand filter infrastructure as the reaction tanks. We are also saving space by using custom-designed clarifiers from Evoqua that can process wastewater ten times faster than a conventional clarifier, thanks to the CoMag system.”

The CoMag system uses magnetite – fully inert, iron ore particles – to enhance the clarification process. The system settles chemical floc up to 30 times faster than conventional clarification.

The tertiary CoMag system will help Severn Trent Water reduce both total suspended solids and phosphorus before the treated water discharges into the River Sowe, the company said.

Currently, the Finham Sewage Treatment Works processes on average 1,597 litres of wastewater every second, which is the equivalent of 14 bathtubs full of water.