Photocatalytic Treatment of Baker’s Yeast Effluent Using UV Light and TiO2/ZnO Composite

Year 2016, Volume: 12 Issue: 3, 609 - 615, 15.12.2016

Emine Yılmaz Serap Fındık

Abstract

Baker’s
yeast effluent is a major source of pollution with high organic load and dark
colour. The aim of this study was to examine the photocatalytic degradation of
baker’s yeast effluent. Wastewater used in this study was a real
wastewater.  An ultraviolet (UV) lamp
with 254nm wavelength was used as a source of UV irradiation, TiO₂/ZnO
composite was used as a catalyst. The effect of the calcination temperature,
calcination time, the catalyst amount on decolorization and removal of chemical
oxygen demand (COD) of baker’s yeast effluent were investigated. According to
the results, the prepared composite TiO₂/ZnO with 4:1 molar ratio,
treated at 700°C for 60min gave a better result and the maximum decolorization
was 35.89% at a catalyst amount of 0.2g/l. COD removal was 14% without
catalyst. By using photocatalysis COD removal at the end of the 60min reaction
time was 4.85% and 8.94% with 0.15g/l and 0.1g/l catalyst loading respectively.

Keywords

Baker’s yeast effluent, COD, Decolorization, Photocatalysis, UV

References

• Bernardo, E. C.; Egashira, R.; Kawasaki,J. Decolorization of molasses wastewater using activated carbon prepared from cane bagasse. Carbon. 1997; 35, 1217-1221.