The removal of organic carbon and nutrients (i.e. N and P) from wastewater is essential for the protection of the water environment. Especially, nitrogen compounds cause eutrophication in the water environment, resulting in bad water quality. Conventional nitrogen removal systems require high aeration costs and additional organic carbon. Microbial electrochemical system (MES) is a sustainable environmental system that treats wastewater and produces energy or valuable chemicals by using microbial electrochemical reaction. Innovative and cost-effective nitrogen removal is feasible by using MESs and increasing attention has been given to the MES development. In this review, recent trends of MESs for nitrogen removal and their mechanism were conclusively reviewed and future research outlooks were also introduced.

ABSTRACT
1. 서 론
2. 제거 원리
    2.1 MES 내 산소공급을 통한 질소 제거
    2.2 MES의 외부 전압 인가를 통한 질소 제거
    2.3 독립영양생물을 이용한 MES의 질소 제거
    2.4 MES 내 Geobacter sp.를 이용한 질산염 환원
    2.5 MES에서 정전기장을 이용한 질소 제거 시스템
3. 향후 전망
References

• 채형원(전남대학교 환경에너지공학과) | Hyungwon Chai (Department of Environment and Energy Engineering, Chonnam National University)
• 최용훈(전남대학교 전기공학과) | Yonghoon Choi (Department of Electrical Engineering, Chonnam National University)
• 김명운(대진대학교 에너지환경공학부) | Myeongwoon Kim (Department of Energy and Environmental Engineering, Daejin University)
• 김영진(국립금오공과대학교 컨설팅 대학원) | Youngjin Kim (Graduate School of Consulting, Kumoh National Institute of Technology)
• 정석희(전남대학교 환경에너지공학과) | Sokhee P. Jung (Department of Environment and Energy Engineering, Chonnam National University) Corresponding author