대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제35권12호
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  • Pages.937-942
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  • 2013
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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HRT 변화에 따른 미세입자 분리 특성

Characteristics of Micro-Particle Separation according to HRT Changes

  • 안광호 (한국건설기술연구원 환경연구실) ;
  • 안재환 (한국건설기술연구원 환경연구실) ;
  • 김이태 (한국건설기술연구원 환경연구실) ;
  • 김석구 (한국건설기술연구원 환경연구실) ;
  • 강성원 (한국건설기술연구원 환경연구실) ;
  • 박은주 (한국건설기술연구원 환경연구실) ;
  • 이영섭 (인천대학교 임베디드시스템공학과)
  • Ahn, Kwangho (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Ahn, Jaehwan (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kim, I-Tae (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kim, Seoggu (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kang, Sungwon (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Park, Eunzoo (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Lee, Youngsup (Department of Embedded systems Engineering, Incheon University)
  • 투고 : 2013.11.12
  • 심사 : 2013.12.02
  • 발행 : 2013.12.30
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초록

유체 내에서 발생된 음파 또는 초음파가 반사벽에 의해 반대방향으로 진행하면서 일정한 파동을 형성하는 음파를 음향정재파(acoustic standing wave)라고 한다. 본 연구에서는 주파수 1.0 MHz와 2.0 MHz의 음향정재파 발생모듈을 설치한 연속식의 입자분리장치에서, 유입수의 층류(laminar flow)를 고려하여, 수리학적체류시간(HRT) 변화에 따른 입자분리 특성을 살펴보았다. 정재파 가동에 다른 입자분리장치 내의 수온은 $1.3{\sim}2.8^{\circ}C$ 정도 증가하였으나 정재파 형성에 큰 영향을 주지 않았다. 주파수 1.0 MHz 가동 시 HRT 1시간에서 2시간, 4시간으로 길어짐에 따라 입자분리 효율(탁도)은 각각 64.1%, 70.0%, 74.3%로, 2.0 MHz에는 HRT에 따라 각각 58.0%, 61.8%, 70.7%로 증가된 것으로 나타났다. 즉, 동일한 주파수일 경우 HRT에 따라 처리효율이 10% 이상 차이가 발생하고 있으며, 1.0 MHz 주파수에서는 2시간, 2.0 MHz에서는 4시간 정도에서 70% 이상의 처리효율을 유지할 수 있다. 주파수 1.0 MHz와 2.0 MHz를 동시에 가동한 결과, HRT 1시간, 2시간, 4시간에서의 입자 분리 효율은 각각 63.8%, 70.6%, 77.6% 나타나 연속된 정재파의 발생 보다는 HRT가 입자분리에 많은 영향을 주는 것을 알 수 있었다.

Fluid generated within the sonic or ultrasonic waves are reflected by the wall, while the opposite direction forming a predetermined sound wave to the acoustic standing wave is referred to. In this study, the frequency of 1.0 MHz and 2.0 MHz acoustic standing wave generation module is installed in a continuous particle separation device, the laminar flow of influent, taking into account the hydraulic retention time (HRT) in accordance with changes in particle separation characteristics investigated. Operation of a standing wave in the particle separation device about $1.3{\sim}2.8^{\circ}C$ temperature is increased, but did not significantly affect the formation of standing waves. During operation, the HRT 1 hr frequency 1.0 MHz 2 hr, 4 hr longer as the particle separation efficiency (turbidity) were 64.1%, 70.0%, 74.3% and, 2.0 MHz has 58.0%, respectively, depending on HRT, 61.8%, 70.7% in the respectively. That is, the same frequency, the HRT treatment efficiency is 10% or more, depending on differences in generation and, 1.0 MHz frequency, 2 hr, 2.0 MHz 4 hr at about 70% or more of the processing efficiency can be maintained. Frequency of 1.0 MHz and 2.0 MHz operation at the same time, as a result, HRT 1 hr, 2 hr, 4 hr particle separation efficiency of 63.8%, respectively, 70.6%, 77.6%, rather than the generation of standing waves appear continuous HRT is affecting a lot of particles to separate could know.

키워드

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