Water and Wastewater Terms Beginning R
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
return activated sludge (RAS)
Settled activated sludge collected in the secondary clarifier and returned to the aeration basin.
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A B C D E F G H I J K L M N O P Q R S T U V W Y Z
Settled activated sludge collected in the secondary clarifier and returned to the aeration basin.