, one can use either a single stage static settling tank with scraper (velocity between 1 and 2 m · h–1) as for the Mossul plant in Iraq (207,000 m3·d–1) (figure 5), or a desludger (see section static ... Pulsator, Turbocirculator, Filtration, Clarification, Drinking water, Surface water, Grit removal, Oil removal, Aquazur, Pulsatube, Settling, Flotation, Settling tanks ... Pulsator Turbocirculator Filtration Clarification Drinking water Surface water Grit removal Oil removal Aquazur Pulsatube Settling Flotation Settling tanks...