During which treatment process are roots, rags, and cans typically removed?

During the primary screening process, roots, rags, and cans are typically removed from wastewater. This initial step is crucial because it helps eliminate large debris that can interfere with later stages of treatment. Screening involves passing the influent through various types of screens, such as bar racks or perforated plates, designed to catch and remove these larger solids.

The removal of these materials is essential for preventing damage to pumps and equipment used in subsequent treatment processes. Additionally, it helps ensure that the treatment system operates effectively and efficiently by reducing the load on other treatment stages that are designed to handle smaller particles and organic matter. By eliminating these larger items early in the process, the overall treatment system can function more smoothly, leading to better removal of contaminants in later phases.