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2020 Vol.52, Issue 3 Preview Page
Effect of Electron-Beam Irradiation on White Water Generated in Paper Mills

전자선 조사에 따른 제지공정 백수의 수질 변화 평가

Ji Young Lee1
,
Hae Min Jo2
,
Su Ho Kim2
,
Yeon Hui Lee2
,
Chul Hwan Kim1†
이지영 1
,
조해민 2
,
김수호 2
,
이연희 2
,
김철환 1†
1Department of Environmental Materials Science/IALS, Gyeongsang National University
2Department of Forest Products, Gyeongsang National University
1경상대학교 환경재료과학과/농업생명과학연구원, 교수
2경상대학교 임산공학과, 학생
†Corresponding author: E-Mail: jameskim@gnu.ac.kr (Address: Department of Environmental Materials Science/IALS, Gyeongsang National University, Jinju, 52828, Republic of Korea)
30 June 2020. pp. 106-112
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Abstract

In this study, we evaluated the effect of electron-beam irradiation on the water quality of the white water generated in paper mills. Four samples of white water were collected from a fine paper mill and from a specialty paper mill. Changes in the water quality were observed, depending on the amount of electron-beam irradiation. Two samples of white water were obtained from the fine paper mill’s disc-filtration system. When the electron-beam dose was increased from 3 to 9 kGy, the pH of these samples decreased slightly, but no significant changes in electrical conductivity or turbidity were observed. However, the total dissolved solids (TDS) and chemical oxygen demand (COD) decreased. The differences in the water-quality trends were not large among the white-water samples. White water from the special paper mill was collected before it entered the ozone-oxidation tank and after it exited from the tank, and the properties of the samples were examined after electron-beam irradiation (10 kGy). The pH, electrical conductivity, and turbidity exhibited the same tendencies as for the white water obtained from the fine paper mill, and the TDS and COD also decreased. In particular, when the intensity of electron-beam irradiation of the ozonated white water was increased, the TDS, COD, and chromaticity improved significantly. We conclude that electron-beam irradiation reduces the COD and chromaticity of white water.

Keywords
Electron beam irradiation
white water
water quality
fine paper
specialty paper
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 52
  • No :3
  • Pages :106-112
  • Received Date : 2020-05-18
  • Revised Date : 2020-06-11
  • Accepted Date : 2020-06-15
  • DOI :https://doi.org/10.7584/JKTAPPI.2020.06.52.3.106
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