한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제37권5호
  • /
  • Pages.363-368
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  • 2021
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
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하수슬러지를 이용한 Bio-block의 비점오염물질 제거 가능성 평가

Evaluation of the Feasibility of Eliminating Non-point Source Pollution Using Waste Sewage Sludge Bio-blocks

  • Han, Sang Moo (Department of Environmental Engineering, Kunsan National University) ;
  • Kim, Do Hyeong (Department of Environmental Engineering, Kunsan National University) ;
  • Jeong, Byung Gon (Department of Environmental Engineering, Kunsan National University)
  • 투고 : 2021.06.02
  • 심사 : 2021.08.31
  • 발행 : 2021.09.30
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초록

On the assessment results of the non-point source pollutant removability of bio-block using waste sewage sludge, at the reactor's initial operation stage, the removal efficiency of COD was slightly unstable. However, after the reactor was stabilized, the COD removal efficiency was higher in the reactor filled with bio-blocks compared to the reactor filled with broken stones. In terms of nitrogen and phosphorus, their removal efficiency was unstable at the initial stage of the reactor operation. This phenomenon was investigated through the bio-block elution experiments. Results indicated that nitrogen and phosphorus were eluted from the bio-blocks affecting their removal at the initial operation. Furthermore, based on elution tests conducted after the dry ashing of the waste sewage sludge, part of the nitrogen and phosphorus was eluted similar to the bio-block elution test results, although considerable amounts of nitrogen and phosphorus were reduced compared to the sludge cake. Prior to the use of the waste sewage sludge bio-blocks as a filter medium to remove non-point source pollutants, a stabilization period of 10 days was required. After the stabilization process, results showed similar characteristics as general aggregates. Moreover, to use the bio-block as a filter medium for the non-point pollutant removal, the filling ratio of 75% was the most suitable as it resulted in the highest nitrogen removal efficiency after the stabilization. The results of this study suggested that waste sewage sludge can be suitably recycled as a mixed raw material for the bio-blocks, with satisfactory application as a filter medium in artificial wetlands, stormwater runoff problems, stream water pollutants to eliminate non-point source pollutants.

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참고문헌

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