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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Physico-chemical Characteristics of Biodegradable Seedling Pots Made of Paper Mill Sludges

제지공장 슬러지를 이용한 생분해성 육묘 포트의 물리화학적 특성 연구

  • Lee, Ji-Young (Dept. of Forest Products/IALS, Gyeongsang National University) ;
  • Kim, Chul-Hwan (Dept. of Forest Products/IALS, Gyeongsang National University) ;
  • Lee, Gyeong-Sun (Dept. of Forest Products/IALS, Gyeongsang National University) ;
  • Jo, Hu-Seung (Dept. of Forest Products/IALS, Gyeongsang National University) ;
  • Nam, Hye-Gyeong (Dept. of Forest Products/IALS, Gyeongsang National University) ;
  • Park, Hyung-Hun (Dept. of Forest Products/IALS, Gyeongsang National University) ;
  • Moon, Sun-Ok (Dept. of Forest Products/IALS, Gyeongsang National University)
  • 이지영 (경상대학교 임산공학과/IALS) ;
  • 김철환 (경상대학교 임산공학과/IALS) ;
  • 이경선 (경상대학교 임산공학과/IALS) ;
  • 조후승 (경상대학교 임산공학과/IALS) ;
  • 남혜경 (경상대학교 임산공학과/IALS) ;
  • 박형훈 (경상대학교 임산공학과/IALS) ;
  • 문선옥 (경상대학교 임산공학과/IALS)
  • Received : 2014.09.11
  • Accepted : 2014.10.03
  • Published : 2014.10.30
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Abstract

London Convention on the prevention of marine pollution by dumping of wastes and other matter prohibits the deliberate disposal of paper mill sludges at sea. In order to explore the alternative plan on the prohibition of sludge disposal at sea, the biodegradable seedling pot was developed by mixing the sludge with old newspaper (ONP) in appropriate mixing ratios. The C/N ratio of the mixed sludge was below 20, leading to rapid deterioration of the organic matters composing the seedling pot. The increased ONP contents in the seedling pot resulted in the increase of pot thickness and thereafter in the decrease of pot density. Cellulose fibers in ONP promoted water absorption of the pot but AKD addition helped the seedling pot to repel water during raising seedling. Breaking length and burst strength of the seedling pot were improved by addition of wet strength additives but air permeability was a little diminished. Biodegradable rate of the seedling pot in a soil was accelerated by the attack of soil microbes at the beginning, and finally the pot was completely degraded in 150 days in a soil.

Keywords

References

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