Drives reduce energy and cut maintenance and ammonia discharge

Anglian Water has cut aerator energy use in half with variable speed drive technology, while removing the threat of blockages A sewage treatment works operated by Anglian Water has halved its aerator energy costs, reduced maintenance and cut ammonia to almost zero levels following the installation of an ABB variable-speed drive. The drive was installed on a 4 kW sewage aerator at the Swallow unmanned treatment works in Lincolnshire. Wayne Barley, northern energy and efficiency engineer for Anglian Water, says: “The vertical rotor…