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하수처리수의 3차처리를 위한 고도산화법(AOP)의 적용성에 관한 연구
정은호 ( Eunho Chung ),정종태 ( Jongtai Jung ),한상윤 ( Sangyun Han ) 한국수처리학회 2021 한국수처리학회지 Vol.29 No.5
Ozone has been applied in combination with various processes for the tertiary treatment of municipal wastewater. However, in Korea, the ozone process is mainly employed for the reuse of tertiary treated wastewater, and an enhanced advanced oxidation process (AOP) is needed to realize the large-scale reuse of treated wastewater. In this study, various AOPs employing ozone (only ozone process, O<sub>3</sub>+H<sub>2</sub>O<sub>2</sub>, O<sub>3</sub>+UV, O<sub>3</sub>+GAC) were used to analyze the TOC, CODcr, and color treatment efficiencies of municipal wastewater and evaluate its applicability of wastewater reuse. The O<sub>3</sub>+H<sub>2</sub>O<sub>2</sub> process showed the highest TOC removal efficiency of 62.0%, while the O<sub>3</sub>+GAC and only ozone processes exhibited the TOC removal efficiencies of 58.9% and 59.3%, respectively. The TOC removal pattern of the O<sub>3</sub>+UV process was similar to that of the O<sub>3</sub>+H<sub>2</sub>O<sub>2</sub> process. The TOC removal efficiency of the O<sub>3</sub>+UV process, 61.0%, was slightly lower than that of the O<sub>3</sub>+H<sub>2</sub>O<sub>2</sub> process. The CODcr removal efficiencies of the O<sub>3</sub>+UV and O<sub>3</sub>+H<sub>2</sub>O<sub>2</sub> processes were 75.8% and 77.0%, respectively. However, the TOC and CODcr removal efficiencies were different within the error range, so there was no significant difference in the processing efficiencies of the methods investigated. The color removal efficiencies of the O<sub>3</sub>+UV (57.8%) and O<sub>3</sub>+H<sub>2</sub>O<sub>2</sub> (57.4%) processes were 57.8%, 57.4%. respectively and it showed similar pattern.