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Upflow
Anaerobic
Sludge
Blanket
Digestors - In such digesters, the liquid waste flows through a blanket of sludge consisting of the bacteria settled as granules of about 4 mm in diameter. Such digesters are suited to treat low strength (Ca. 1% solids), soluble wastes, e.g., sugarbeet washings. These are not suited to treat wastes having particulate materials.
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