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Metabolic pathways involved in the emission of nitrous oxide in wastewater nitrification

첫 페이지 보기
  • 발행기관
    한국생물공학회 바로가기
  • 간행물
    한국생물공학회 학술대회 바로가기
  • 통권
    2011년도 한국생물공학회 춘계학술발표대회 (2011.04)바로가기
  • 페이지
    pp.222-222
  • 저자
    Dong-Jin KIM, Toor Umair ALI, Yesul LIM, Dae Hee AHN
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A144851

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원문정보

초록

영어
In this study a batch reactor was used to investigate the nitrous oxide emission from nitrification using activated sludge at different concentrations of ammonia. It was also attempted to investigate the relative contribution of different pathways involved in emitting nitrous oxide by using two types of wastewaters, with and without organic compounds during nitrification process. In addition, the steps of nitrification responsible for emitting nitrous oxide were identified using nitrification inhibitors. N2O emission from the synthetic wastewater reached 1.4, 2.4, 3.8 and 4.3 mg N2O– from 5, 12.5, 25 and 50 mg NH4+-N respectively. The real wastewater emitted 2.1, 2.9, 4.0 and 5.3 mg N2O– from 5, 12.5, 25 and 50 mg NH4+-N. The N2O emission from activated sludge with synthetic wastewater was found to be 0.065 - 0.12 kg N2O– per kg N (oxidized NH4 +), while it was 0.1 –0.42 kg N2O– per kg N (oxidized NH4 +) with the real wastewater. The results showed an increase of 5 - 33% in N2O emissions when real wastewater was used. Under the ammonia oxidation inhibition by allylthiourea produced almost no N2O while the control experiment produced 0.3 mg N2O-N. Under the inhibition of nitrite oxidation by azide, which selectively blocks nitrite oxidation, emitted 1.5 mg N2O– which is significantly higher than that of the control. This indicates that the second step of nitrification (nitrite oxidation) did not play any significant role in the reduction of nitrous oxide emission. Moreover, nitrite accumulation by blocking nitrite oxidation activates N2O production. It is thought that nitrite favors the production of N2O as it could inactivate nitrous oxide reductase. This indicated that N2O emitted during the ammonia oxidation or due to heterotrophic denitrification as nitrite and organics were also present in the system. Nitrite seems to be the key components in microbiological N2O production pathways.

키워드

denitrification inhibition nitrification nitrous oxide emission

저자

  • Dong-Jin KIM [ Dept. of Environmental Sciences &Biotechnology, Hallym University, Gangwon 200-702. ]
  • Toor Umair ALI [ Dept. of Environmental Sciences &Biotechnology, Hallym University, Gangwon 200-702. ]
  • Yesul LIM [ Dept. of Environmental Sciences &Biotechnology, Hallym University, Gangwon 200-702. ]
  • Dae Hee AHN [ Dept. of Environmental Engineering &Biotechnology, Myongji University, Gyeonggi 449-728. ]

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
  • 설립연도
    1984
  • 분야
    공학>생물공학
  • 소개
    이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다 1. 생물공학 분야의 발전을 위한 연구 협력 2. 생물공학의 실용화를 촉진시키기 위한 산학 협동 3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최 4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간 5. 생물공학 발전을 위한 정책 건의 6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동

간행물

  • 간행물명
    한국생물공학회 학술대회
  • 간기
    반년간
  • 수록기간
    1985~2013
  • 십진분류
    KDC 476 DDC 576

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