期刊
JOURNAL OF POLYMERS AND THE ENVIRONMENT
卷 18, 期 2, 页码 98-103出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10924-010-0180-5
关键词
Biodegradation; Anaerobic; Polyvinyl alcohol; Blends; Starch; Gellan; Xanthan; Glycerol
资金
- Ministry of Youth, Education and Sports of the Czech Republic [MSM 7088352101]
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(t)) 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.
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