Santiago WWTP (CHL)

The largest sewage treatment plant in Latin America, La Farfana, in the Chilean capital Santiago, has been fitted with five new Landustrie screw pumps. The screws have been placed in the inlet pumping station, where some 6-7 hundred thousand m3 of wastewater is pumped into the treatment process every day.

Before the contract was awarded, a large package of tender requirements had to be met. When awarding the contract, not only the lowest price was eventually considered, but also quality aspects and references. Quality in particular was one of the spearheads, especially since the existing steel screw pumps were already showing signs of fracture after only a few years of operation.
For optimum screw pump design, we use the Finite Element Method. With this calculation programme, the acting forces can be mapped under all conditions and the most ideal screw design determined.

All five screw pumps, measuring 3.7 metres in diameter and some 21 metres long, were delivered and assembled with drive and electric controls.