- Rugby will be Europe’s first wastewater treatment plant with a permanent installation of Evoqua’s ballasted BioMag system settling technology
- This settling technology has been proven in facilities throughout the United States for more than 7 years
- Evoqua Water Technologies has been selected by Severn Trent Water and its design and construction partner, Costain, to supply Evoqua’s BioMag® ballasted clarification system
- Their goal is to both increase output and reduce phosphorus at the Rugby Sewage Treatment Works
Algal blooms and poor river ecosystems are triggered by high levels of phosphorus in the river. To combat the blooms and restore water bodies to “good” status, the UK Environment Agency’s National Environment Programme (NEP) is imposing low phosphorus limits on many wastewater treatment plants, including Rugby. The introduction of the BioMag system will significantly decrease the amount of phosphorus that the works discharges, making this an important step to achieving compliance with the new phosphorus limit of 0.4 mg/l of total phosphorus (T-P).
The BioMag system uses the addition of magnetite – fully inert, iron ore particles – to enhance the existing Activated Sludge process. As a result, the settlement across the existing Final Settlement Tanks is greatly improved even with the predicted 25% increase in flow anticipated at the works. For communities that face challenging wastewater characteristics due to industrial discharge or dense populations, the BioMag system is the ideal solution. The BioMag system will help Severn Trent Water reduce both total suspended solids and phosphorus before the treated water discharges into the River Avon.
‘’For Rugby, the new BioMag system will be installed to combat both the new phosphorus limit and the expected increase in the local population, which means that the plant will be able to treat more effluent waste to a better quality.’’ explains Simon Radford, UK Sales Manager of Evoqua’s Wastewater Treatment business. ’’As an alternative to adding more Final Settlement Tanks, the BioMag system allows the user to get more out of their existing assets at a fraction of the cost of such major new civil structures.”