 DRDGOLD Ltd NYSE:DRD, JSE:DRD said that its flagship metallurgical plant, Ergo Mining Proprietary Limited has entered into a second five-year research and support agreement with the University of the Witswatersrand. The South Africa-focused mine tailings specialist said the research agreement with the Gold Research Group in Wits Universitys School of Chemical and Metallurgical Engineering will be aimed at optimising and improving the probability of increased gold recovery, as well as environmentally friendly treatment technologies and will be conducted by students under the supervision of their academic staff members. 