대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제38권12호
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  • Pages.635-640
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  • 2016
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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식종원 및 유기물 농도 변화에 따른 평판형 외기환원전극 미생물 연료전지의 질소 제거

Nitrogen Removal in Flat-Panel Air-Cathode Microbial Fuel Cell according to Various Inoculum Sources and Organic Concentration

  • 박영현 (부산대학교 사회환경시스템공학과) ;
  • 유재철 (부산대학교 사회환경시스템공학과) ;
  • ;
  • 이태호 (부산대학교 사회환경시스템공학과)
  • Park, Younghyun (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Yu, Jaecheul (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Nguyen, Thi Hien (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Lee, Taeho (Department of Civil and Environmental Engineering, Pusan National University)
  • 투고 : 2016.10.24
  • 심사 : 2016.12.09
  • 발행 : 2016.12.31
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초록

미생물연료전지(MFC)는 하 폐수내의 유기물로부터 전기를 생산할 수 있는 획기적인 기술이지만, 실용화를 위해서는 하 폐수 내의 질소를 제거할 수 있어야 한다. 본 연구에서는 두 개의 대면적 SEA (separator electrode assembly)로 구성된 평판형 외기환원전극 미생물연료전지(FA-MFC)를 이용하여 질산화 전배양의 유무와 식종원에 따른 총질소제거율을 평가하였다. 질산화 전배양 단계에서 FA-MFC의 질산화율은 식종원과는 무관하게 99% 이상을 나타냈다. 질산화 및 탈질 단계에서 300 mg-COD/L 이하의 낮은 유기물 농도에서는 전배양을 하지 않은 조건의 총질소제거율이 가장 높았다. 유기물 농도가 증가할수록 더 높은 총질소제거율을 나타냈으며, 유기물제거율은 모든 조건에서 95% 이상을 나타냈지만, 종속영양탈질에만 이용되지는 않은 것으로 판단된다. FA-MFC의 전기 발생량은 매우 낮았지만, 유기물과 질소를 동시에 제거할 수 있다는 장점이 있기 때문에 획기적인 하 폐수처리공법으로 발전시킬 수 있으리라 기대된다.

Although microbial fuel cell (MFC) can produce electricity from organics in wastewater, nitrogen removal is required for application of process for wastewater treatment plant. This study developed flat-panel air-cathode MFCs (FA-MFCs) comprised of two large separator electrode assemblies (SEAs) and evaluate total nitrogen removal according to three inoculum sources and pre-nitrification acclimation. The nitrification efficiencies were >99% regardless of inoculum sources under the phase for pre-nitrification acclimation. The total nitrogen removal efficiencies of FA-MFCs without pre-nitrification acclimation were the highest at the low organic conditions (<300 mg-COD/L) under the phase for nitrification and denitrification. The increase of organic concentration influenced the total nitrogen removal efficiency, positively. The organics were removed >95% but were not used for heterotrophic denitrification totally. This study suggests that application of FA-MFC system for wastewater treatment can allow the simultaneous removal of organic and nitrogen compounds, although this affects the low electricity production.

키워드

참고문헌

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피인용 문헌

  1. Effect of Electrode Configuration on the Substrate Degradation in Microbial Fuel Cells vol.39, pp.8, 2017, https://doi.org/10.4491/KSEE.2017.39.8.489
  2. Effect of COD and HRT Changes in Submerged Microbial Fuel Cells on Nitrogen Removal at the Level of Domestic Wastewater vol.40, pp.8, 2018, https://doi.org/10.4491/KSEE.2018.40.8.314