LIFE CYCLE ASSESSMENT OF ACTIVATED CARBON ADSORPTION AND OZONATION TO REMOVE MICROPOLLUTANTS FROM TEXTILE WASTEWATER

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Ayşe Sena Akdeniz- Tez_V11_Son_13.10.2022 (2).pdf

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2022-8-29

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Akdeniz, Ayşe Sena

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To avoid potential adverse effects by micropollutants in secondary textile wastewater, it is necessary to apply an advanced treatment process, among which activated carbon adsorption and ozone oxidation are the most attractive alternatives. There is still a lack of studies evaluating the environmental impacts of these processes for the tertiary treatment of textile wastewater. Using the life cycle assessment (LCA) methodology, this study assesses and compares the environmental impacts of ozone oxidation and GAC adsorption. Micropollutants were included in the study using the results from a literature survey on the concentration of micropollutants in secondary textile wastewater and also in the effluents from activated carbon adsorption and ozone oxidation treatment. SimaPro 9.2.0.2 was used to model the processes using background data from the Ecoinvent v3.6 database. Adopting the impact analysis method of Impact 2002+, the impacts of two scenarios: GAC adsorption and ozone oxidation, were assessed. Results show that the environmental impact of ozone oxidation is significantly higher than that of GAC adsorption for almost all impact categories due to higher energy consumption. The GAC adsorption shows almost 90 % lower impacts in 14 of 15 categories studied. It is worth noting that the environmental impacts of ozone oxidation are strongly related to energy consumption for ozone generation, which emphasizes the importance of the source of electricity. The results from the study support GAC adsorption as a suitable process for removing micropollutants from secondary textile effluent.

Subject Keywords

Life Cycle Assessment, Activated Carbon Adsorption, Ozone Treatment, SimaPro, Textile Wastewater

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https://hdl.handle.net/11511/99718

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. S. Akdeniz, “LIFE CYCLE ASSESSMENT OF ACTIVATED CARBON ADSORPTION AND OZONATION TO REMOVE MICROPOLLUTANTS FROM TEXTILE WASTEWATER,” M.S. - Master of Science, Middle East Technical University, 2022.