Stem Drive have received a contract from Laing O'Rourke for a secondary digester air mixing system for the new fifth digester being constructed at the Thames Water Deephams STW at Edmonton.

Stem Drive have received a contract from Laing O'Rourke for a secondary digester air mixing system for the new fifth digester being constructed by Laing O'Rourke at the Thames Water Deephams STW at Edmonton. This is part of the sludge process stream improvements as a result of increasing sludge loads proposed for the site. The existing four secondary digesters are already fitted with the Stem Drive air mixing system.

The new system will ensure that the contents of the digester are adequately mixed to prevent solids deposition on the base of the tank and to ensure a consistent feed of digested sludge to the sludge dewatering plant.