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

Ji-Young Lee; Chul-Hwan Kim; Gyeong-Sun Lee; Hu-Seung Jo; Hye-Gyeong Nam; Hyung-Hun  Park; Sun-Ok  Moon

doi:10.7584/ktappi.2014.46.5.009

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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

30 October 2014. pp. 9-18

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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

Paper mill sludge

biodegadable

pulp mold

seedling pot

London convention

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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 : 46
No :5
Pages :9-18
Received Date : 2014-09-11
Revised Date : 2014-10-01
Accepted Date : 2014-10-03
DOI :https://doi.org/10.7584/ktappi.2014.46.5.009

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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