Study of the Determination of the Ultimate Aerobic Biodegradability of Plastic Materials Under Controlled Composting Conditions
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Several ISO standards for determining the ultimate aerobic/anaerobic biodegradability of plastic materials have been published. In particular, ISO 14855-1 is a common test method that measures evolved carbon dioxide using such methods as continuous infrared analysis, gas chromatography or titration and others (ISO 14855-1(2005.9)). This method is a small-scale test for determining the ultimate aerobic biodegradability of plastic materials, where the amounts of compost inoculum and test sample in one tenth comparing with that of ISO 14855-1. This method is well versed in ISO/DIS 14855-2 which the carbon dioxide evolved from test vessel is determined by gravimetric analysis of carbon dioxide absorbent. The focus of this study is to elucidate statistically the results of round robin test by seven countries used MODA, which were various deviations among the experiments.
KeywordsBiodegradation Gravimetric measurement Carbon dioxide evolved Statistical analysis MODA
We are very grateful to six foreign countries for their participations in the Workshop and MODA round robin test, especially for the scientific and technical advises. All the data were carried out by their efforts, Prof. Weng, Y. (Institute of Plastics Processing & Application of Light Industry, Dept. of Materials Sci. & Eng. of Beijing Technology & Business University, China), Dr. Verma S. K. (Central Institute of Plastics Engineering & Technology (CIPET), India, Dr. Sadocco, P. (SSCC, Italian Pulp and Paper Institute, Milano, Italy), Mr. Verstichel, S. (OWS n.v., Belgium), PhD. Ekendahl, S. (SP Chemistry and Materials Technology, Sweden), and Prof. Narayan, R. (C-10 Engineering Research Complex, Michigan State University, USA). We thank Daicel Chemical Industries, Ltd. and Mitsui Chemicals Inc. for the supplying the plastics. And, we are also very grateful to Ministry of Economy, Trade and Industry (METI) in Japan, for the instruction of standardization.
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