. "RIV/70883521:28110/02:63500533!RIV/2003/MSM/281103/N" . . "0009-2770" . . "Waste from the manufacture of chrome-tanned leathers (so-called shavings) can be processed (apart from alkaline or acid breakdown) by enzymatic hydrolysis employing alkaline proteases. Under mild reaction conditions, a soluble collagen hydrolyzate is formed and a solid fraction (so-called chrome cake) with high chromium content is formed after filtration. Further use of the chrome cake, e.g., tanning bath recycling, necessitates a maximum possible reduction in the protein fraction. This work performed deproteination of the chrome cake by decantation washing with water and enzymatic hydrolysis. Decantation washing of the chrome cake obtained after two-stage enzymatic hydrolysis of chrome-tanned shavings was performed six times with drinking water at laboratory temperature. A reduction in protein content occurs, as was proved by chemical analysis of chrome cakes prior to and after washing. Further deproteination of the chrome cake so washed (hence disposed of soluble part) was executed by means of addit"@en . . . "Odstra\u0148ov\u00E1n\u00ED b\u00EDlkovinn\u00E9ho pod\u00EDlu z ko\u017Eelu\u017Esk\u00E9ho chromit\u00E9ho kalu" . "Rudlov\u00E1, S." . . "2002-07-30+02:00"^^ . . . . . . . . "Odpady z v\u00FDroby chromo\u010Din\u011Bn\u00FDch usn\u00ED (tzv. postru\u017Einy) jsou velk\u00FDm probl\u00E9mem v ko\u017Eelu\u017Esk\u00E9m pr\u016Fmyslu. Enzymatickou hydrol\u00FDzou tohoto materi\u00E1lu je mo\u017En\u00E9 z\u00EDskat proteinov\u00FD hydrolyz\u00E1t a chromit\u00FD kal (kol\u00E1\u010D). Pro dal\u0161\u00ED vyu\u017Eit\u00ED (recyklaci) chromu je nutn\u00E9 z tohoto kalu odstranit zbytkovou b\u00EDlkovinu. Tato pr\u00E1ce popisuje deproteinaci chromit\u00E9ho\u00ED kol\u00E1\u010De dekanta\u010Dn\u00EDm prom\u00FDv\u00E1n\u00EDm vodou a dodate\u010Dnou enzymovou hydrol\u00FDzou. Dekanta\u010Dn\u00EDm promyt\u00EDm chromit\u00E9ho kol\u00E1\u010De, z\u00EDskan\u00E9ho po dvoustup\u0148ov\u00E9 (prvotn\u00ED) enzymov\u00E9 hydrol\u00FDze chromo\u010Din\u011Bn\u00FDch postru\u017Ein, bylo dosa\u017Eeno \u010D\u00E1ste\u010Dn\u00E9ho sn\u00ED\u017Een\u00ED obsahu b\u00EDlkoviny. N\u00E1sledn\u011B byla provedena deproteinace takto promyt\u00E9ho chromit\u00E9ho kol\u00E1\u010De (tedy zbaven\u00E9ho rozpustn\u00E9 \u010D\u00E1sti) pomoc\u00ED dodate\u010Dn\u00E9 enzymov\u00E9 hydrol\u00FDzy za vyu\u017Eit\u00EDm enzym\u016F ESPERASE a TRYPSINu. Touto cestou do\u0161lo k zna\u010Dn\u00E9mu odstran\u011Bn\u00ED b\u00EDlkoviny z chromit\u00E9ho kol\u00E1\u010De i p\u0159i velmi n\u00EDzk\u00FDch koncentrac\u00EDch enzym\u016F." . "Praha" . "28110" . "The removal of protein part from chromium sludge"@en . . "R\u016F\u017Ei\u010Dka, Jan" . "RIV/70883521:28110/02:63500533" . "Chemick\u00E9 listy" . "4"^^ . "0"^^ . "509" . "0"^^ . "3"^^ . "Odstra\u0148ov\u00E1n\u00ED b\u00EDlkovinn\u00E9ho pod\u00EDlu z ko\u017Eelu\u017Esk\u00E9ho chromit\u00E9ho kalu"@cs . . "Kupec, Jan" . "54. sjezd chemick\u00FDch spole\u010Dnost\u00ED - sborn\u00EDk" . . . "Brno" . . . "Z(MSM 265200014)" . "1"^^ . "656738" . "hydrolysis, shavings, chromium, protein, washing, deproteination, enzymes"@en . "[9E36D4F0D7DF]" . . "Odstra\u0148ov\u00E1n\u00ED b\u00EDlkovinn\u00E9ho pod\u00EDlu z ko\u017Eelu\u017Esk\u00E9ho chromit\u00E9ho kalu"@cs . . . "The removal of protein part from chromium sludge"@en . "Odstra\u0148ov\u00E1n\u00ED b\u00EDlkovinn\u00E9ho pod\u00EDlu z ko\u017Eelu\u017Esk\u00E9ho chromit\u00E9ho kalu" . "Dvo\u0159\u00E1\u010Dkov\u00E1, Marie" .