se 1. In filuration, Attachment by Brownian Diffusion occurs when larger particles m enough to travel off their streamlines and pump into media grains, 2. In flocculent settling particles flocculate during settling. By flocculation or the increase in mass and thus settle at a faster rate, 3- Region in which the clarified effluent is collected and discharge throughow Settling zone 4- Alum (aluminum sulfate) is the usual source of trivalent cati an advantage In addition to its high positive charge. - The concentration of coliforma is typically expressed as c Nitrogen and Sulphate are the main nutrients in aquatic plus