Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Performance Evaluation of Powdered Activated Carbon (PAC) Contactor for the Removal of Organics and Taste and Odor

분말활성탄 접촉조의 맛·냄새 및 유기물 제거 효율 평가

  • Bae, Byung-Uk (Department of Environmental Engineering, Daejeon University) ;
  • Lim, Mun-Gu (Department of Environmental Engineering, Daejeon University)
  • 배병욱 (대전대학교 환경공학과) ;
  • 임문구 (대전대학교 환경공학과)
  • Received : 2010.01.08
  • Accepted : 2010.05.25
  • Published : 2010.07.30
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Abstract

In order to evaluate the performance of a powdered activated carbon (PAC) contactor, two water treatment plants (WTP) were selected as target sites. The result of tracer tests showed that the plug flow portion of a bisymmetry-type contactor (H WTP) was more than 70%. A maze-type contactor (C WTP) also had more than 70% of plug flow portion after intra-basin baffles were installed. According to the operating data of the target WTPs, there was no clear evidence that the addition of PAC contributed to the removal of organics. However, the results of jar tests, conducted with the raw water taken from the H WTP, proved that PAC could remove dissolved organic carbon (DOC) to some extent when the proper velocity gradient was maintained. It was estimated that the production rate, defined as the ratio of the operating flowrate to the design flowrate, of the C and H WTPs was only 27 and 50%, respectively. Because of these lower production rates, the mixing intensity in the contactor was much less than the designed value and, finally, the performance of the PAC contactor was much lower than what was expected.

Keywords

References

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