Solids handling in wastewater applications has become increasingly challenging. The combination of low-flow appliances and water conservation at large, along with the rise of “flushable” media, has resulted in much higher solids-to-water ratios. This puts a strain on pumps and other equipment. In particular, solids such as wipes can get stuck on equipment, causing damage, and sending operators scrambling to clear jams or initiate repairs. Traditional solids handling methods are still effective, but in many cases, are no longer the best solution.
Traditional solids handling systems are most effective in low-pressure installations. The large openings allow large solids, including rag balls, to pass through. However, in many regions, it is increasingly common for high-head, low-flow pumps to feed into high-pressure force mains. In these types of installations, large solids passages in the impeller can be a detriment, resulting in excessive vibration that can shorten the lifespan of the pump. Operating high, and to the left of the performance curve requires a pump designed to handle that sort of application.