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group metals (PGMs) process streams has a twofold advantage. Firstly, it minimizes contamination of the aquatic environment, and secondly, it recovers metals that have significant commercial value. Conventional methods for the removal of metals from wastewater have proven to be ineffective, especially in the case of very low metal concentrations. A satisfactory process would achieve the goal of metal recovery as well as wastewater purification at a relatively low cost, and without the generation of large amounts of residual solids. The search for new, effective and economical technologies for the removal of precious metals from waste streams has therefore shifted towards biosorption. Employing materials of biological origin allows existing knowledge to be applied to the development of technologies to treat metaland organic-containing solutions. These biosorbents possess metal –sequestering properties capable of quickly and efficiently decreasing the concentration of metals ions in dilute complex solution from parts per billion to parts per trillion (Wang and Cheng, 2006). For economic reasons, researchers have paid much attention to various byproducts from the fermentation industries because these are available in large quantities. One such waste from the food and beverage industry is brewery waste biomass, Saccharomyces cerevisiae. During fermentation, the yeast biomass increases threeto six-fold. However, this brewery waste material is largely used only as swine and ruminant feeds (Soares and Soares, 2012). The biosorbents can be treated by various chemical or physical processes to improve the effectiveness of their functional groups, thereby increasing the metal binding capacities. The technical viability and biosorption capacity of the Saccharomyces cerevisiae waste biomass for the removal of PGMs from synthetic solution in a batch system has been investigated previously (Oke, Ndlovu, and Sibanda, 2014). However, for practical and large-scale operation, a packed column is preferred since a batch system is usually limited to the treatment of small quantities of wastewater. Free biomass has low mechanical strength and is not suitable for use in column applications (Rose and Townsley, 1986). Furthermore, high hydrostatic pressures are required to generate suitable flow rates in packed columns, and these high pressures can disintegrate the free biomass. These problems can be avoided by the use of immobilized biomass systems. In the biosorption processes for metal removal from wastes and dilute process streams, different immobilization Purification of a dilute platinum group metals process stream using waste yeast biomass immobilized on plaster of Paris