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how does water have oxygen Waterfall Aeration Systems:A waterfall aerator (one of the earliest as well as most typical aerators) contains a series of steps that the water moves over ( much like a flowing stream). In all waterfall aerators, aeration is accomplished in the splash areas. Splash zones are created by positioning blocks throughout the slope. (They are the oldest as well as most typical sort of aerators. ) Cascade aerators can be made use of to oxidize iron and also to partially reduce liquified gases. Cone Aerators:Cone aerators are used mainly to oxidize iron as well as manganese from the ferrous state to the ferric state before filtration. Sludge collection Tank & Discharge Treated Water:. Sludge is generated from the treatment of wastewater in on-site (e. g. septic tank) and also off-site (e. g. triggered sludge) systems. Oil & Gas field. Chemical Industries. Fabric Industries. Food Market. Drug industry. Automobile.