에너지공학 (Journal of Energy Engineering)

  • 제20권2호
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  • Pages.84-89
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  • 2011
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  • 1598-7981(pISSN)
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  • 2713-7074(eISSN)
한국에너지학회 (The Korean Society for Energy)
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알칼리처리와 초음파처리를 이용한 슬러지 가용화 연구

A Study of Sewage Sludge Solubilization by Alkali and Ultrasonic pretreatment

  • 김재형 (서울과학기술대학교 에너지환경대학원) ;
  • 양홍규 (서울과학기술대학교 에너지환경대학원) ;
  • 이준철 (서울과학기술대학교 에너지환경대학원) ;
  • 박홍선 (서울과학기술대학교 에너지환경대학원) ;
  • 최광근 ((주)지앤지인텍) ;
  • 박대원 (서울과학기술대학교 에너지환경대학원)
  • Kim, Jae-Hyung (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Yang, Hong-Gyu (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Lee, Joon-Cheol (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Park, Hong-Sun (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Choi, Gwang-Geun (G&G InTech, Gyeonggi R&DB Center) ;
  • Pak, Dae-Won (Graduate School of energy and Environment, Seoul National University of Technology & Science)
  • 투고 : 2011.03.14
  • 심사 : 2011.06.13
  • 발행 : 2011.06.30
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초록

본 연구는 하수슬러지에 알칼리처리와 초음파처리를 적용하여 최적의 가용화 조건을 도출하고자 각각의 단일처리, 병합처리로 가용화율을 확인하였다. 단일처리 중 알칼리처리는 4종의 알칼리시약을 각각 적용하여 전처리한 결과, NaOH를 이용한 방법이 27.6%로 가장 높은 가용화율을 확인할 수 있었으며, 주입농도가 높아지더라도 가용화에 미치는 영향에는 한계가 있음을 확인하였다. 초음파처리는 140 W/L의 조사밀도에서 가용화율이 가장 높았으며(33~39%), 조사주기의 증대는 가용화율에 큰 영향을 미치지 않는 것으로 확인되었다. 알칼리 처리와 초음파처리를 혼재한 병합처리 시 알칼리처리 후 초음파처리를 적용한 방법이 $70.4{\pm}9.4%$의 가용화율로 초음파처리 후 알칼리처리 방법에 비해 약 22% 높은 결과를 나타내었다. 각 조건에서의 SCOD 증가속도는 병합처리(알칼리처리 후 초음파처리)에서 0.076 $min^{-1}$으로 가장 높은 결과를 나타내었다.

In this study, individual(alkaline, ultrasonic) and combined(alkaline+ultrasonic) pretreatment effect on sewage sludge solubilization was investigated. COD solubilization rates increased with the dose of NaOH added: solubilization reached 27.6%. Additional alkaline agents did not increase solubilization further. Ultrasonic pretreatment achieved 33~39% solubilization when 140 W/L amplitude. In(alkaline(pre-treatment)+ultrasonic (after-treatment)) treatment, solubilization increased as the combined intensity in creased($70.4{\pm}9.4%$). SCOD rising rate(0.076) was achieved.

키워드

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