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aerial photograph of Frankley Water Treatment Works, Birmingham , West Midlands ,England, UK. Frankley Water Treatment Works is operated by Severn Trent Water and provides drinking water for Birmingham. The water is piped from Wales and treated with the dissolved air flotation (DAF) process which removes suspended solids from the water. This is done by injecting pressurised air and then releasing the air which causes air bubbles to from and rise to the surface bringing any contaminants with it where they can be mechanically separated. Frankley Water Treatment Works is the largest dissolved air flotation plant in the world.
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