Anaerobic Biodegradation of Polyvinyl Alcohol Modified by Extracellular Polysaccharides

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Journal of Polymers and the Environment, ISSN: 1566-2543, Vol: 18, Issue: 2, Page: 98-103

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Hrnčiřík, Josef; Pšeja, Jiří; Kupec, Jan; Bernkopfová, Světlana
Springer Nature; Springer-Verlag
Environmental Science; Materials Science; biodegradation; anaerobic; polyvinyl alcohol; blends; starch; gellan; xanthan; glycerol
article description
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 (D) 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 h). Content of polysaccharides favorably affects biodegradation degree of polyvinyl alcohol blends, but at the expense of reduced mechanical properties of resultant products. © 2010 Springer Science+Business Media, LLC.