Filtration process follows a cycle consists of four-stages: filter ripening, effective filtration, breakthrough, and backwashing see Figure (3.1) for turbidity profile. The ripening or maturation stage occurs initially as the filter is put back into service after cleaning. The peak occurs because of residual backwash water being flushed from the media, and from particles in the influent water that are too small to be captured. As the clean media captures particles, it becomes more efficient because the particles that are captured become part of the collector surface in the filter. It allows some particles to pass through the filter media and creates up to two turbidity spikes. Up to 90 percent of the particles that pass through a well-operating filter do so during the ripening stage (Davis, 2010).