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Processing poultry feathers into keratin hydrolysate through alkaline-enzymatic hydrolysis

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dc.title Processing poultry feathers into keratin hydrolysate through alkaline-enzymatic hydrolysis en
dc.contributor.author Mokrejš, Pavel
dc.contributor.author Svoboda (FT), Petr
dc.contributor.author Hrnčiřík, Josef
dc.contributor.author Janáčová, Dagmar
dc.contributor.author Vašek, Vladimír
dc.relation.ispartof Waste Management and Research
dc.identifier.issn 0734-242X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2011-03
utb.relation.volume 29
utb.relation.issue 3
dc.citation.spage 260
dc.citation.epage 267
dc.type article
dc.language.iso en
dc.publisher SAGE Publications Ltd. en
dc.identifier.doi 10.1177/0734242X10370378
dc.relation.uri http://wmr.sagepub.com/content/29/3/260
dc.subject Alkali-enzyme hydrolysis en
dc.subject chicken feathers en
dc.subject keratin en
dc.subject keratin hydrolysate en
dc.subject waste en
dc.description.abstract Poultry feathers make up for as much as 8.5% of chicken weight and represent a considerable amount of almost pure keratin waste which is not being adequately utilized at the present time. The present study dealt with the processing of poultry feathers through a two-stage alkaline-enzymatic hydrolysis. In the first stage, feathers were mixed with a 0.1 or 0.3% KOH water solution in a 1 : 50 ratio and were incubated at 70 degrees C for 24 h. After adjusting pH to 9, the effects examined in the second processing stage on the amount of degraded feathers were those of proteolytic enzyme additions (1-5%), time (4-8 h) and temperature (50-70 degrees C). Processing feathers in 0.3% KOH and hydrolysing for 8 h in the second stage at 70 degrees C with a 5% dose of enzyme (relative to dry feathers weight) produced approx. 91% degradation. Keratin hydrolysate is distinct for its high nitrogen content and reasonable inorganic solids level. Two-stage technology of alkaline-enzymatic hydrolysing of poultry feathers in an environment of 0.3% KOH achieves high efficiency under quite mild reaction conditions (temperature not exceeding 70 degrees C with pH in a mildly alkaline region), and is feasible from an economic viewpoint. Keratin hydrolysate can find particular application in packaging technology (films, foils and encapsulates). en
utb.faculty Faculty of Technology
utb.faculty Faculty of Applied Informatics
dc.identifier.uri http://hdl.handle.net/10563/1002170
utb.identifier.rivid RIV/70883521:28110/11:43865345!RIV12-MSM-28110___
utb.identifier.rivid RIV/70883521:28140/11:43865345!RIV12-MSM-28140___
utb.identifier.obdid 43865347
utb.identifier.scopus 2-s2.0-79952409424
utb.identifier.wok 000287917900004
utb.identifier.pubmed 20483878
utb.identifier.coden WMARD
utb.source j-wok
dc.date.accessioned 2011-08-16T15:06:36Z
dc.date.available 2011-08-16T15:06:36Z
utb.contributor.internalauthor Mokrejš, Pavel
utb.contributor.internalauthor Svoboda (FT), Petr
utb.contributor.internalauthor Hrnčiřík, Josef
utb.contributor.internalauthor Janáčová, Dagmar
utb.contributor.internalauthor Vašek, Vladimír
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