Characteristics of Biodegradation under Composting and Vermiculite Condition

ABSTRACT http://dx.doi.org/10.7584/ktappi.2016.48.1.127Journal of Korea TAPPIVol. 48. No. 1, 2016, 127-133pISSN (Print): 0253-3200Printed in Korea • 충남대학교 농업생명과학대학 환경소재공학과(Dept. of Biobased Materials, College of Agriculture and Life Science, Chungnam National University, Daejeon, Korea)1 FITI 시험연구원 환경바이오평가팀(Enviroment & Bio assesment team, FITI Testing & Research Institute, Ochang, Cheonwon-gun, Chungbuk, 363-883, Korea)† 교신저자(Corresponding Author): E-mail: lachesis@cnu.ac.kr This study is performed that furniture and interior materials of MDF's (Medium Density Fiberboard) biodegradation properties, and the goal of this study is investigation of pos-sibility of waste-MDF's composting after landfilling. To investigate biodegradation, this study was performed according to KS M ISO 14855-1, and there were two different soil conditions including a compost condition and an activated vermiculite condition as arti-ficial soil. This experiment was tested for 40 days. The measurement of carbon-dioxide generation was processed every 24 hour in 1-2 week, and every 48 hour after 3 week. In the same days, MDF showed 24.4% of biodegradation in compost condition, and 6.2% in activated vermiculite. Also, the reference material of TLC (thin-layer chromatography) grade cellulose showed 26.4%, 11.4% in compost and activated vermiculite respectively. The dilution plate method was performed for biological analysis in the study. This ex-periment was used for investigation of inoculum's (Bacillus licheniformis) activity. As the result of bioassay, compost has more other germs include inoculum than activated ver-miculite in the first week. Especially in the 2nd week, the reference material under the compost condition showed the most germ's activity, and also the biodegradation was the highest. Consequentially, compost condition was able to reduce a performing period of biodegradation testing than activated vermiculite. However, activated vermiculite could be stabilizing errors between repetition.Keywords: Biodegradation, MDF, activated vermiculite, compost, ultimate biodegradation