Geosmin and 2-methylisoborneol (MIB) are two common taste and odour compounds found in drinking water supply sources and are often source of customer complaints for water quality. This paper presents an investigation into the removal of these compounds using an advanced photocatalytic oxidation process. An immobilised TiO₂ photoreactor was used. The degradation efficiency of both geosmin and MIB at concentrations of 250 ng/L each and 500 ng/L each was compared with that by a suspended TiO₂ photoreactor. It was found that geosmin and MIB were degraded much faster in the suspended TiO₂ photoreactor than in the immobilised TiO₂ photoreactor. The photocatalytic degradation kinetics was analysed and found to follow the first-order reaction. The complete removal time for both geosmin and MIB in the suspended TiO₂ photoreactor was shorter than 30 minutes, while it was longer than 60 minutes in the immobilised TiO₂ photoreactor. The advantages, disadvantages and implications of both photoreactor types for drinking water treatment applications were highlighted. In addition, methods which can be potentially used to enhance the removal efficiency of the immobilised TiO₂ photoreactor are discussed, along with experimental results on the effect of adding hydrogen peroxide, known as an electron scavenger, to the photocatalytic system.