“…From a practical point of view, using slurry systems involves several major problems such as: (a) separation of the catalyst from the slurry is difficult, (b) suspended particles especially in high concentrations tend to aggregate, (c) using the suspensions in systems with continuous flow is difficult, and (d) due to the high absorption by TiO 2 and dissolved organic samples, particularly in the case of colours, the penetration depth of UV light is limited (Arabatzis et al, 2002;Behnajady et al, 2007b;Khataee et al, 2011;Zhou and Ray, 2003). In order to solve these problems, the catalyst was immobilised onto solid substrates such as glass beads, activated carbon fiber, cotton material, cement surface, sand, polymer films and Rasching rings (Behnajady et al, 2007a;Behnajady et al, 2008;Daneshvar et al, 2005;Fernandez et al, 2004;Khataee, 2009). The aim of this paper is kinetic modelling and representing of design equation for a batch-recirculated photoreactor.…”