Like many other U.S. wastewater treatment agencies, the Green Bay (Wis.) Metropolitan Sewerage District has had to reduce its staff during the last decade and yet keep its facilities operating efficiently and within permit limits. So, the district has been automating process monitoring and other basic operator tasks. The district recently automated its waste activated sludge (WAS) thickening process. Automating this process improved operations while reducing the time that operators physically have to be in the thickening building.
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