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Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes

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dc.title Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes en
dc.contributor.author Hoffmann, Jaromír
dc.contributor.author Řezníčková, Iveta
dc.contributor.author Kozáková, Jarmila
dc.contributor.author Růžička, Jan
dc.contributor.author Alexy, Pavol
dc.contributor.author Bakoš, Dušan
dc.contributor.author Precnerová, Lenka
dc.relation.ispartof Polymer Degradation and Stability
dc.identifier.issn 0141-3910 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2003
utb.relation.volume 79
utb.relation.issue 3
dc.citation.spage 511
dc.citation.epage 519
dc.type article
dc.language.iso en
dc.publisher Elsevier Science B.V. en
dc.identifier.doi 10.1016/S0141-3910(02)00367-1
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0141391002003671
dc.subject polyvinylalkohol cs
dc.subject PVAL cs
dc.subject protein cs
dc.subject směsi cs
dc.subject vytlačované fólie cs
dc.subject plasty cs
dc.subject vodní prostředí cs
dc.subject biorozložitelnost cs
dc.subject testování cs
dc.subject polyvinyl alcohol en
dc.subject PVAL en
dc.subject protein en
dc.subject blends en
dc.subject extruded films en
dc.subject plastics en
dc.subject water environment en
dc.subject biodegradability en
dc.subject testing en
dc.subject assessing en
dc.description.abstract Research was conducted into biodegradability of mixeds polymer films based on poly(vinyl alcohol), protein hydrolyzate (collagen hydrolyzate from wastes after chrome tanning) and sglycerol in an aqueous aerobic environment. Evaluation of biodegradation was based on carbon dioxide produced in the gas phase. Pure PVAL was degraded by a current mixed culture for water-treatment (unadapted) only after an approx. 10-day lag phase en
dc.description.abstract during breakdown of mixed film the protein component and glycerol were broken down first and PVAL degradation occurred in the second stage. Biodegradation could be well described by 1st-order formal chemical kinetics. Repeated degradation by an adapted culture proceeded in a single stage with considerably shorter lag phase (< 30 h) at a simultaneously approx. 1.5-fold greater breakdown rate (rate constants). During degradation of substrates containing PVAL, microbiological tests proved an approx. 100-fold increase in numbers of PVAL-degrading bacteria. Added protein hydrolyzate + glycerol in PVAL contributed to increasing biodegradability more than followed from proportional representation of individual components. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1000230
utb.identifier.rivid RIV/70883521:28110/03:63501392
utb.identifier.obdid 11552921
utb.identifier.scopus 2-s2.0-0037230797
utb.identifier.wok 000180839500015
utb.source j-riv
utb.contributor.internalauthor Hoffmann, Jaromír
utb.contributor.internalauthor Řezníčková, Iveta
utb.contributor.internalauthor Růžička, Jan
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