A submerged Boerger rotary lobe pump has put a wastewater treatment plant back on course with what used to be a troublesome grease-sludge-basin application.

Previously, the wastewater treatment plant incurred unsatisfactory amounts of additional, complex maintenance and downtime because its centrifugal pump couldn’t cope with the total solids content.

When trying to pump sludge from a grease-sludge-basin into a storage shaft (from which a second pump fed a digestion tower), the centrifugal pump would regularly suffer blockages or failures. In addition to making significant savings on maintenance, the WWTP also no longer requires a storage shaft and a second pump.

The Boerger rotary lobe pump has sufficient power and stability to consistently convey the viscous grease sludge from the grease sludge basin directly into the digestion tower. Since its installation, the Boerger rotary lobe pump has not resulted from any blockages or failures, despite the challenging high total solids contents of the pumped medium.