What does "mesh" refer to in filtration systems?

In filtration systems, "mesh" specifically refers to the number of holes per inch in a material that is used for filtering. This measurement indicates the size of the openings in the mesh and, consequently, determines the particle size that can pass through while larger particles are trapped. A higher mesh count means smaller openings, which allows finer particles to be filtered out, while a lower mesh count facilitates the passage of larger particles. Understanding this concept is crucial for selecting appropriate filtration materials based on the specific requirements of wastewater treatment processes.