Wastewater processing at atmospheric pressure

A wastewater collection tank feeds a vaporizing unit through an inlet near the unit's top. A burner produces heat, which a blower blows through a blower tube that passes through the upper portion of the unit to the bottom portion of the unit. A substrate through which heated air can pass extends across the unit between the bottom of the blower tube and the wastewater inlet, and pall rings rest on the substrate. The heated air moving upward through the unit heats the pall rings and the falling wastewater, a substantial portion of which is vaporized at approximately atmospheric pressure. The vapor is vented from the top of the unit. Un-vaporized wastewater collects at the bottom of the unit and is recycled through the system with raw wastewater in the collection tank.