A customer with a tough application for a Positive Displacement RAS (Return Activated Sludge) Pump was experiencing high maintenance with the existing submersible unit, requiring lifting of the pump every 3-4 weeks, usually due to solids blockage. NOT a pleasant task regularly lifting from raw sewage!
Triangle replaced it with a self-priming Boerger Rotary Lobe Pump.
A useful feature of the pump is that its direction is fully reversible. The submerged filter can be unblocked by reversing the direction of the pump. Maintenance is simple: remove the lobe cover and clean! (to see just how easy, follow the pictures below):
A further inherent problem within the transfer pump station was crust build-up. The solution called for a floating draw-down rig, automatically adjusting to the effluent levels, to skim and recycle the surface sludge and sediment. The flotation unit and pipe work complete with a TT submersible macerator / mixer pump was fabricated at Triangle workshops and installed. This has been a great success.
Allen Bradley PLC’s were used for system controls & automation, the software programming written by our engineers.