In this work, we suggested two effective immobilization methods for urease immobilization using TiO2 beads and TiO2-chitosan beads. The immobilization methods (A and B) were economic and simple. These methods lead to the evaluation of an effective process for removal of urea. Generally, free enzymes are immobilized to be reused repeatedly in the industrial applications and in addition to that, some other criteria must be improved such as thermal stability, pH stability and operational stability. After determination of the optimum immobilization conditions of urease onto TiO2 beads and TiO2-chitosan beads, characteristic properties of immobilized enzyme systems (optimum temperature, optimum pH, kinetic parameters, thermal stability, pH stability, operational stability and reusability) were compared with free urease. We improved the stability properties (especially thermal, pH stability and reusability) of the urease. The criteria of reusability which is extremely important to practical applications were also investigated and activity analysis was performed 20 times in succession. The 50% activity was protected after 11 cycles for method A and 16 cycles for method B. The obtained results show clearly that the prepared matrix particles are effective and easily applicable for immobilization of urease. These factors are important for practical applications. activity at 65 °C. However, at this temperature free urease protected only 15% activity.