Abstract: An integrated device for wastewater purification, comprising a coagulation zone; a flocculation zone connected to and in fluid communication with the coagulation zone; a flotation zone connected to and in fluid communication with the flocculation zone and comprising a froth discharge port; and a separation zone below and in fluid communication with the flotation zone and comprising a contaminant separator and a purified wastewater discharge port; the wastewater entering the device being mixed with electrolytically-generated coagulants and gas bubbles in the coagulation zone; the flocculation zone receiving and gently mixes coagulated wastewater contaminants and gas bubbles formed in the coagulation zone and aggregating them into flocs before flotation of buoyant flocs in the flotation zone and the separation zone being adapted for further floc formation, oil coalescence, settling and discharge of non-buoyant contaminants.

Abstract: An integrated device for wastewater purification, comprising a coagulation zone; a flocculation zone connected to and in fluid communication with the coagulation zone; a flotation zone connected to and in fluid communication with the flocculation zone and comprising a froth discharge port; and a separation zone below and in fluid communication with the flotation zone and comprising a contaminant separator and a purified wastewater discharge port; the wastewater entering the device being mixed with electrolytically-generated coagulants and gas bubbles in the coagulation zone; the flocculation zone receiving and gently mixes coagulated wastewater contaminants and gas bubbles formed in the coagulation zone and aggregating them into flocs before flotation of buoyant flocs in the flotation zone and the separation zone being adapted for further floc formation, oil coalescence, settling and discharge of non-buoyant contaminants.