매립지 침출수 현장 처리를 위한 폴리우레탄과 개질토의 특성 분석 실험에 관한 연구Characterization of Polyurethane and Soil Layers for In-situ Treatment of Landfill Leachate
- Other Titles
- Characterization of Polyurethane and Soil Layers for In-situ Treatment of Landfill Leachate
- Authors
- 박찬수; 정영욱; 박중섭; 백원석; 신원식; 천병식; 한우선; 박재우
- Issue Date
- Mar-2007
- Publisher
- 한국물환경학회
- Keywords
- Denitrification; In-situ treatment; Landfill leachate; Nitrification
- Citation
- 한국물환경학회지, v.23, no.2, pp.281 - 286
- Indexed
- KCI
- Journal Title
- 한국물환경학회지
- Volume
- 23
- Number
- 2
- Start Page
- 281
- End Page
- 286
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/180330
- ISSN
- 2289-0971
- Abstract
- A chemical and biological permeable barrier with economic feasibility is suggested to treat landfill leachate in this study. The proposed composite layers consist of bentonite, and polyurethane (PU) foam that is mixed with powdered activated carbon (PAC) and inoculated with microorganisms from local wastewater treatment plant. Each layer is mixed with local sand, and yellow brown soil. Batch tests were conducted to investigate the sorptions of nitrate on the PU foam and PAC, and nitrification/denitrification rate of each layer material. Nitrification occurred in 30 minutes with initial ammonia concentration of 100 mg/L, and the concentration of nitrate attached in the PU foam increased after 270 minutes. Results of denitrification batch tests showed 76.6%, 87.3% and 88% of nitrate removal efficiency at 10%, 20% and 30% of the volume ratio of PU foam, respectively. The pH increased from 7 to 9.42, and alkalinity increased from 980 mg/L to 1720 mg/L during the denitrification batch tests. In the column experiments using the proposed composite layers with 20% of the volume ratio of the PU foam, about 96% of BOD, 63% of COD, 58.1∼79.5% of total nitrogen were removed.
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