Changing characteristics of pollutants in high-rate anaerobic reactor treating landfill leachate = 고율 혐기성 반응조를 이용한 매립지 침출수 처리시 오염물질 변환 특성

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Landfilling has been a popular, economical and convenient method of waste disposal of domestic, industrial and hazardous waste. Leachate generated from landfill by contact with precipitation, surface run-off, and groundwater is one of the major environmental hazards. Leachate characteristics are related with the biological phenomena occurring in the landfill as well as with the characteristics of the solid waste. Leachate typically contains organic matter as well as inorganic ions including ammonia and heavy metals in high concentration. Futhermore, leachate characteristics have not been defined clearly. It is, therefore, difficult to treat properly. And it could be detrimental to environment as it contaminates groundwater, soil, and water resources if it is not properly collected, treated, and disposed. It has to be treated by various methods including physicochemical or biological treatment before being released into receiving environment. In this research, the characteristics of pollutants in a UASB reactor treating landfill leachate were studied. Besides, comprehensive studies were conducted to overcome the limitations in anaerobic leachate treatment and to improve its efficiency. Potential problems such as ammonia inhibition, leachate toxicity, precipitate accumulation, and limited use of anaerobic process were also investigated. The UASB reactor could be effective for various industrial wastewaters containing high concentration of ammonia nitrogen. The COD removal rate was about 80% at ammonia concentration up to 6000 mg-N/l. The inhibition threshold value of anaerobic treatment was 490 mg-N/l of free ammonia nitrogen. However, the methane yield decreased with increasing ammonia nitrogen. The ammonia nitrogen concentration I50, causing 50% inhibition of SMA were 2670, 4780, and 5570 mg-N/l, respectively. The kinetic coefficients (l, m, and n) of ammonia inhibition using formate, acetate, and propionate as substrate were 3.28, 1.00 and 0.60, respectively. ...
Advisors
Shin, Hang-Sikresearcher신항식researcher
Description
한국과학기술원 : 토목공학과,
Publisher
한국과학기술원
Issue Date
2000
Identifier
157751/325007 / 000945337
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 토목공학과, 2000.2, [ xiii, 157 p. ]

Keywords

Inhibition; Denitrification/Methanization; Anaerobic treatment; Ammonia; Landfill leachate; 중금속 침전물; 메립지 침출수; 탈질/메탄화; 혐기성 처리; 암모니아; Metal precipitate

URI
http://hdl.handle.net/10203/30520
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=157751&flag=dissertation
Appears in Collection
CE-Theses_Ph.D.(박사논문)
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