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Uzavřená recyklační smyčka činicí operace

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dc.title Uzavřená recyklační smyčka činicí operace cs
dc.title Closed loop for chromium in tannery operation en
dc.contributor.author Kolomazník, Karel
dc.contributor.author Mládek, Milan
dc.contributor.author Langmaier, Ferdinand
dc.contributor.author Shelly, D. C.
dc.contributor.author Taylor, M. M.
dc.relation.ispartof Journal of American Leather Chemists Association
dc.identifier.issn 0002-9726 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2003-12
utb.relation.volume 98
utb.relation.issue 12
dc.citation.spage 487
dc.citation.epage 490
dc.event.title 98th Annual Meeting of the American-Leather-Chemists-Association
dc.event.location Skytop
utb.event.state-en United States
utb.event.state-cs Spojené státy americké
dc.event.sdate 2002-06-20
dc.event.edate 2002-06-23
dc.type article
dc.type conferenceObject
dc.language.iso en
dc.publisher American Leather Chemists Association (ALCA) en
dc.subject procesni inženýrství cs
dc.subject optimalizace cs
dc.subject ekologické zpracovaní odpadu cs
dc.subject processing engineering en
dc.subject optimization en
dc.subject ecological treatment of waste en
dc.description.abstract Příspěvek se týká zpracování tuhých a kapalných odpadů z koželužské výroby. Hlavním kritériem byly matematické modely platné pro procesy v koželužství. Navržené modely byly využity při optimalizaci první "mokré" koželužské operace - námoku surových kůží v koželužské výrobě, která se vyznačuje velkou spotřebou užitkové vody a chemikálií. Pro stanovení cílové funkce bylo zvoleno ekonomické hledisko, tj. nákladová funkce. cs
dc.description.abstract Even though the leather industry is environmentally important as a user of a byproduct of the meat industry, it is still perceived as a consumer of resources and a producer of pollutants. When processing one metric ton of rawhide, 200 kg of a leather-final product is obtained, and only 20% of the raw material weight is converted to leather. The biggest problem, and one that is now under scrutiny, is the disposition of chrome-tanned solid wastes. To keep the chromium from tanned wastes within control limits we have worked out a modified enzymatic dechromation technology and developed it into an industrial scale with a daily capacity of three metric tons of chrome shavings. The chromium-containing sludge, isolated by this technology, contains 10-15% magnesium oxide, and is used (here) as a precipitator for chromium in spent tanning liquor. We treated a spent liquor containing 2294 ppm of chromium with the chromium sludge, obtained from the enzymatic reaction. After the treatment, the content of chromium decreased from the original 2294 ppm to 6 ppm, which means that practically total dechromation of the waste chrome water has occurred. This chrome removal from the spent tanning liquor, using the chrome sludge from digestion of the chrome-tanned solid wastes, effectively provides a closed loop for chromium in tanning operations. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1002002
utb.identifier.obdid 11553262
utb.identifier.scopus 2-s2.0-0346906962
utb.identifier.wok 000187445900005
utb.identifier.coden JALCA
utb.source d-wok
dc.date.accessioned 2011-08-09T07:34:28Z
dc.date.available 2011-08-09T07:34:28Z
utb.contributor.internalauthor Kolomazník, Karel
utb.contributor.internalauthor Mládek, Milan
utb.contributor.internalauthor Langmaier, Ferdinand
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