Chamber filter press feeding

A waste water treatment plant was looking for an alternative to its previous multi-phase eccentric screw pump to feed a chamber filter press. The reason for replacing the eccentric screw pump was the high maintenance and the high cost of spare parts and energy.

A Boerger twin-pack Rotary Lobe Pump was selected. This is two identical Boerger Rotary Lobe Pumps which are operated in series. Each rotary lobe pump has its own frequency converter. This allows the speed to be individually regulated for each pump. When feeding the chamber filter press, there is a choice between two phases - the pre-fill phase or the pressurized phase. During the pre-fill phase, large quantities of sludge are pumped into the chamber filter press to fill up its chamber. The Boerger pumps operate at high speed for this.

The increasing filling level of the chamber increases the counter pressure in the chamber filter press as the solids in the sludge have gathered in front of the filter screens. The pressure is recorded using a pressure gauge. The speed of the Boerger pumps is then reduced accordingly using the frequency converter. (Pressure phase) The customer is extremely pleased with the Boerger Rotary Lobe Pumps. The space-saving design, the outstanding pump output and the ease of maintenance all impressed the staff at the waste water treatment plant.

Technical data