splitter box for co-settling with raw wastewater in the primary clarifiers. The resulting primary sludge/WAS mixture is pumped directly into one of three primary anaerobic digesters that are heated and mixed by Linear Motion mixers. After the sludge is stabilized it is transferred to one secondary anaerobic digester for final stabilization.
A reportable S72 wastewater overflow occurred on 29th January 2018 by where the Return Activated Sludge (RAS) Splitter box had become blocked causing approximately 80KL of wastewater to overflow. It is estimated that approximately 15KL of wastewater entered the Lefroy Brook.