Whey separation using TiO₂-modified ultrafiltration membrane

Kiss, Zs. and Kertész, Sz. and Hodúr, C. and Keszthelyi-Szabó, G. and László, Zs. (2014) Whey separation using TiO₂-modified ultrafiltration membrane. Acta Alimentaria, 43 (Supple). pp. 78-84. ISSN 0139-3006

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Abstract

Nowadays, the membrane filtration technique is a commonly used method for the separation of whey. The most significant limitation of membrane applications is fouling, which causes flux decline. During this work, regenerated cellulose membranes covered by TiO₂-nanoparticles were investigated and applied to the separation of whey solution. Experiments were carried out in a dead-end ultrafiltration cell, and the changes in filtration parameters and the photocatalytic effects of the UV irradiated TiO₂ modified membrane surface on the membrane fouling were examined. Our results showed that the water flux decreased with increasing TiO₂ layer thickness, but the retention of turbidity and of COD increased. After separation, the membrane surface was cleaned by UV irradiation by means of photocatalytic oxidation. It was found that the original flux was recoverable, while the retention of the membrane decreased after cleaning.

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