Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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The effect of bleaching reagents on bleachabilities of DIP and environmental loads

탈묵펄프용 표백약품에 따른 표백 특성 및 표백폐수의 환경부하 영향

  • Ahn, Chi-Deuk (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University) ;
  • Park, Jung-Yoon (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University) ;
  • Hwang, Sung-Jun (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University) ;
  • Hong, Seok-Jun (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University) ;
  • Lee, Jin-Hee (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University) ;
  • Kim, Hyoung-Jin (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University) ;
  • Chung, Sung-Hyun (KCCL)
  • 안치덕 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 박정윤 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 황성준 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 홍석준 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 이진희 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 김형진 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 정성현 (전주페이퍼)
  • Received : 2015.02.11
  • Accepted : 2015.02.23
  • Published : 2015.02.28
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Abstract

DIP(deinked pulp) was bleached by FAS, $Na_2S_2O_4$ and $H_2O_2$, which are widely used in DIP bleaching process, in order to improve optical properties of DIP, and the bleaching efficiencies of DIP and environmental loads of waste water were compared, depending on bleaching chemical dosages. With the application of different bleaching chemicals, some positive improvements were shown in optical and physical properties of bleached pulp. However, the physical properties of bleached DIP and their characteristics of wastewater were remarkably different, depending on dosages and bleaching reagents. DIP chemicals with FAS and $Na_2S_2O_4$ have higher improvement in optical and physical properties than $H_2O_2$. Also, environmental loads such as pH, turbidity, SCODcr and cationic demand were decreased in reductive bleaching process. Despite of higher effectiveness of reductive bleaching process, there were some environmental problems caused by sulfur ions from FAS and $Na_2S_2O_4$. With the method of sulfur ion controls, it would be more effective than $H_2O_2$ bleaching process.

Keywords

References

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