CASE STUDIES
Chamber success as Borger’s pumps take screws out and send energy costs down
Burdened with cumbersome maintenance, expensive spare parts and very high energy costs, a wastewater treatment plant has replaced its multi-phase eccentric screw pumps with new Rotary Lobe pumps, made by Börger.
Installed for a chamber filter press, the space-saving Börger pumps have been supplied as a twin-pack unit; two identical Rotary Lobe Pumps, which are operated in series. Each Börger rotary lobe pump has its own frequency converter that allows speeds to be individually regulated.
When feeding the chamber filter press, operators at the wastewater treatment plant now have a choice between two phases - the pre-fill phase and the pressurized phase. During the pre-fill phase, large quantities of sludge are pumped at high speed into the chamber filter press to fill up its chamber.
As the solids in the sludge gather in front of the filter screens, the increasing filling level of the chamber increases the counter pressure in the chamber filter press. Using the frequency converter, the speed of the Börger pumps is then reduced accordingly.
In addition to improving the output and efficiency of the application, the new Rotary Lobe pumps have drastically reduced energy costs, and are also far easier to service with their easy access, Maintenance-In-Place design.
AUMA Actuator upgrade after 40 years continuous service for Anglian Water
An AUMA actuator that was originally installed back in the 1980s, when big hair was the style of the day and new romantic bands like Duran Duran and Spandau Ballet were top of the charts, has been replaced after over 40 years in service.
The original AUMA SA6 B electric actuator was installed on a filter drain valve at Anglian Water’s North Walsham Water Treatment Works, just south of Cromer in north Norfolk. The actuator was replaced as part of AUMA Actuators Limited’s Service Level Agreement with Anglian Water.
Paul Hopkins is AUMA Actuator Limited’s managing director. He says: “It’s extraordinary to think of the changes that have occurred during the service lifetime of this actuator. When it was first installed the internet as we know it didn’t exist and mobile phone communications were in their infancy.
“This clearly demonstrates the longevity and reliability of AUMA electric actuators, which prevents service downtime and maximises
32 | October 2023 |
www.draintraderltd.com SA6B AUMA Actuators, manufactured back in the 80s
A wastewater treatment plant is now making significant energy savings after replacing troublesome screw pumps with Borger’s Rotary Lobe pumps.
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