Recalcitrant organic costituents, such as phenols and aromatics, can often be found in refinery effluents. Phenols in particular can seriously affect living organisms by bioaccululation. For this reason very strict limits are set on water discharge. Starting from a laboratory scale, Cannon Artes has developed an innovative cost effective industrial scale solution for a refinery plant facing the Caspian Sea. This paper has been presented at the ADIPEC Conference in November 2016 in Abu Dhabi.