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Title: | Anaerobic biodegradation of polyvinyl alcohol modified by extracellular polysaccharides | ||||||||||
Author: | Hrnčiřík, Josef; Pšeja, Jiří; Kupec, Jan; Bernkopfová, Světlana; Bernkopfová, Světlana | ||||||||||
Document type: | Peer-reviewed article (English) | ||||||||||
Source document: | Journal of Polymers and the Environment. 2010, vol. 18, issue 2, p. 98-103 | ||||||||||
ISSN: | 1566-2543 (Sherpa/RoMEO, JCR) | ||||||||||
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DOI: | https://doi.org/10.1007/s10924-010-0180-5 | ||||||||||
Abstract: | This work focused on anaerobic biodegradation of blends composed of glycerol-plasticized polyvinyl alcohol (PVA) and biopolymer (starch, gellan, xanthan) in an aqueous environment, after inoculation with digested activated sludge from a municipal wastewater treatment plant. Glycerol degradability is comparable to degradability of used modifying agents. Modifying agents added in the 20?40 wt % range proportionally increased biodegradation degree (Dt) calculated from balance of transformed carbon in the system. Biodegradation degree of polysaccharides and glycerol attained 95 % and over. For PVA it was only 6.5 % (in breakdown times up to 500 hours). Content of polysaccharides favorably affects biodegradation degree of polyvinyl alcohol blends, but at the expense of reduced mechanical properties of resultant products. | ||||||||||
Full text: | http://www.springerlink.com/content/t365636r084t6161/ | ||||||||||
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