AbstractThe aim of the study is to evaluate the effectiveness of environmentally friendly antiscalant ADIC RO-18AdicGreen in preventing the formation of scales in the reject, dispersing organic matter and inhibiting the colloidal fouling in the seawater reverse osmosis systems. The antiscalant developed is environmentally friendly because it is phosphorous and nitrogen free. Experimental tests were conducted in order to evaluate the ability of the antiscalant developed to disperse organic and colloidal matter. The results of filtration curves, operated under constant pressure (Modified Fouling Index), and the study using scanning electron microscopy with energy dispersive X-ray spectroscopy of the deposit adhered to filters, indicated that the antiscalant dosage retards filter fouling, and decreases the amount of clay retained on the filter, with respect to a filter without the presence of antiscalant. To evaluate the ability of this antiscalant developed to prevent scale formation in the reject of seawat...

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