Abstract: A method and system for removing sulfur and dust from waste gases, particularly refinery waste gases, wherein the waste gas to be cleaned is passed to a scrubbing tower above a scrubber sump and, in order to remove SO2 and acidic gases, scrubbed in a scrubbing zone of the scrubbing tower, in counter-current with a scrubbing fluid that is drawn from the scrubber sump and passed to spray nozzles at the upper end of the scrubbing zone. Sulfites contained in the scrubber sump are oxidized to form sulfates, by means of gasification with air in the scrubber sump or in an external device assigned to the scrubber sump. A suspension stream is drawn from the scrubber sump. The gas that leaves the scrubbing zone flows through a wet electrofilter arranged above the scrubbing zone in the scrubbing tower, whereby dust particles and aerosols and entrained droplets are collected on precipitation electrodes of the wet electrofilter.