In addition, there is the report that the immobilized cells have higher cadmium removal properties than that of the free cells due to their increased cell surface to bind with cadmium (Sombatjinda, 2004). The study of this research is comparing adsorption on surface to using with chitosan flake and entrapment to using with chitosan bead. Adsorption is reversible immobilization which it is based on weak forces such van der Waals forces, ionic and hydrophobic interactions and hydrogen bonds (Górecka and Jastrzębska, 2011). Entrapment is an irreversible method, where immobilized particles or cells are entrapped in a support matrix or inside fibers, entrapment of the microorganisms in porous polymer carrier was often used to capture the microorganisms from suspended solution and then obtain the immobilized microorganisms (Verma et al., 2006).