한국환경보건학회지 (Journal of Environmental Health Sciences)

  • 제36권3호
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  • Pages.222-228
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  • 2010
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  • 1738-4087(pISSN)
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  • 2233-8616(eISSN)
한국환경보건학회 (Korean Society of Environmental Health)
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활성슬러지를 이용한 질소방향족화합물의 생물학적 분해 특성

Biodegradation Characteristics of Nitrogen-containing Aromatic Compounds in Activated Sludge

  • 조관형 (청운대학교 철도행정토목공학과)
  • Jo, Kwan-Hyung (Dept. of Civil and Environmental Engineering, Chungwoon University)
  • 투고 : 2010.03.15
  • 심사 : 2010.05.10
  • 발행 : 2010.06.30
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초록

Biological degradation of nitrogen-containing aromatic compounds was investigated in activated sludge previously adapted to mineralize low concentrations of nitrogen-containing aromatic compounds. Normally, the time required for 95% degradation of 10 mg/l dinitrophenol (DNP) under aerobic conditions was less than 4 hours without any lag, and with mixed liquor suspended solid (MLSS) levels from 600 to 1,000 mg/l. However, when the initial DNP concentration was increased to 75 mg/l, lags and even complete inhibition of DNP degradation were observed. The length of the lag was found to increase proportionally with decreasing MLSS levels. When dilute activated sludge was incubated for extended periods (192 hours), degradation of 75 mg/l DNP did eventually occur after lag periods of 37 to 144 hours, depending on the MLSS concentration. DNP was degradable in high concentrations if MLSS concentrations were sufficiently high to allow growth of bacteria resistant to the toxic effects of DNP.

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참고문헌

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