Effective wastewater screening during normal flow looks very different from screening during peak flow events. Under most circumstances, however, it isn’t possible to address both effectively. As such, engineers and municipalities design their screening with peak flow in mind. This means debris bypass or larger screen opening sizes and slower scraper speeds, a compromise that results in suboptimal screening during normal flows. Unfortunately, letting more debris through the screen during normal flow can lead to costly problems, such as pump clogs and more frequent cleanouts of the clarifier and digester.
Source: WaterOnline.com
