In 2000, Pump Systems Ltd was called on to participate in the upgrade of a large wastewater treatment plant in New Zealand, where existing gas mixing equipment operating on the seven 30 metre diameter digesters was to be replaced with a simpler, more efficient means of mixing. A total of eight large Vaughan model H10P12 belt-driven chopper pumps with 75 kW, 4-pole speed electric motors were supplied for this project.
