“…Among the techniques used for protein recovery and purification, liquid-liquid extraction using aqueous two-phase systems (ATPS) offers the advantages of gentle environment, favorable processing time and easy scale-up (Albertsson, 1986;Oliveira et al, 2002). Methods of conventional extraction, such as spray column, can be conveniently applied to aqueous two-phase systems (Sawant and Sikdar, 1990;Jafarabad et al, 1992a and b;Pawar et al, 1997). Another tool that has been recently successfully applied for liquid-liquid extraction with aqueous two-phase systems is the perforated rotating disc contactor (PRDC).…”