2013 is a milestone year for Brimstone STS Limited, marking the 20th anniversary of its annual Vail Sulfur Recovery Symposium and the launch of the first Brimstone European Sulfur Recovery Symposium in Vienna, Austria. The Vienna Sulfur Symposium will be a regular annual event held each year in May. Lisa Connock reports on the inaugural event which took place at the Hotel Bristol on 27-31 May.