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http://dx.doi.org/10.7584/ktappi.2014.46.5.009

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

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)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.46, no.5, 2014 , pp. 9-18 More about this Journal
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;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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