상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제26권3호
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  • Pages.409-421
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  • 2012
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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3D 복극충진전기분해를 이용한 원전 ETA에 의해 유발된 폐수 내 COD 및 T-N 제거

Removal of COD and T-N caused by ETA from Nuclear Power Plant Wastewater using 3D Packed Bed Bipolar Electrode System

  • 김한기 (한양대학교 건설환경공학과) ;
  • 정주영 (한양대학교 건설환경공학과) ;
  • 신자원 (한양대학교 건설환경공학과) ;
  • 박주양 (한양대학교 건설환경공학과)
  • 발행 : 2012.06.15
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초록

Ethanolamine (ETA) is mainly used to prevent corrosion of pipe in secondary cooling system of nuclear power plant. Condensed ETA in wastewater could increase COD and T-N when it was emitted to natural water system. Compared to conventional treatments, electrochemical oxidation process using packed bed bipolar electrodes was adopted to treat COD and T-N. According to arrangement of feeder electrode, single packed bed bipolar electrode reactor and multi-paired packed bed bipolar reactor were developed and conventional zero-valent iron (ZVI) was selected as conducting bipolar electrode. Bipolar electrodes were coordinated three-dimensionally in the reactor. The experimental results showed that COD and T-N was little removed in unit system at different pH condition (pH 8 and 11) on 100V. However, in multi-paired system that applied 600V, COD was eliminated 80.85% (anode-cathode-anode, A-C-A) and 85.11% (cathode-anode-cathode, C-A-C), respectively. T-N was also removed 96.88% (A-C-A) and 90.63% (C-A-C), simultaneously. Current efficiency was estimated both single and multi-paired system. At unit bipolar packed bed reactor, current efficiency was almost zero, however in multi-paired system, current efficiency was 300~500% at A-C-A and 250~350% at C-A-C. Current efficiency was over 100% hence it was confirmed that this system is more effective than conventional electrochemical oxidation system.

키워드

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  2. Enhanced removal of ethanolamine from secondary system of nuclear power plant wastewater by novel hybrid nano zero-valent iron and pressurized ozone initiated oxidation process vol.24, pp.21, 2017, https://doi.org/10.1007/s11356-017-9416-4
  3. lectrospinning Method 기반 CNF의 물성분석과 전기분해 공정에서 전극으로의 응용 vol.28, pp.2, 2017, https://doi.org/10.14478/ace.2017.1012
  4. Removal of Ethanolamine (ETA) and COD Produced in a Power Plant Wastewater by Nano-ZVI (Zerovalent Iron) and Hydrogen Peroxide (H2O2) vol.10, pp.2, 2019, https://doi.org/10.18178/ijesd.2019.10.2.1147