Investigation of the Efficiency of Photocatalytic Surfaces in Removal of H₂S from Treatment Plants

Abstract: In this study, the photocatalytic removal of H₂S emitted from wastewater and causing bad odor was investigated. For this purpose, an Ultraviolet deodorization unit with a volume of 0.0041m³, a photocatalytic surface of 0.1122m² prepared with TiO₂ and MnO2, and a 20-watt Ultraviolet-A lamp was used. The odor-forming water-sludge mixture taken from the entrance structure was exposed to Ultraviolet-A light for 10 minutes, and the change in the amount of H₂S over time was examined with 3 different applications. Obtained results showed that H₂S removal increased with time. After 10 minutes, application-1 (Photocatalytic surface is active + Ultraviolet-A ray is active) 98%, application-2 (Photocatalytic surface is present + Ultraviolet-A ray is passive) 91%, application-3 (No photocatalytic surface+ If the ultraviolet-A ray is active), 93% H₂S removal was obtained. It was observed in all three cases that the amount of H₂S in the environment decreased as the exposure time to ultraviolet rays increased. This study is important in terms of being an alternative to the classical methods used in odor removal.

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