DescriptionBeckton STP, Activated Sludge Tank - geograph.org.uk - 1481906.jpg
English: Beckton STP: Activated Sludge Tank The primary effluent from the settling tanks (1481890) is now largely free of solid matter, but contains much dissolved organic matter. In these tanks it is vigorously aerated so that micro-organisms can convert this to Carbon Dioxide and Water. From here the liquid goes to 1481916 to settle. The name 'Activated Sludge' refers to the fact that the tanks are seeded with the sludge from the previous generation of activation. See 1481923.
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