CSW002 – UU WN United Utilities Case Study Brush Aeration Optimisation United Utilities provides water and sewerage services to over 7 million people and over 200,00 businesses in the north-west of England. One of their sites employs Orbal oxidation ditches for nutrient removal. This design uses brush aerators and is considered energy-intensive and difficult to control. Following success at other sites, Perceptive Engineering was asked to assess

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