Contribution to Deproteination of Residual Chrome Sludge after Enzymatic Hydrolysis of Shavings with Additional Removal of Magnesium

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Contribution to Deproteination of Residual Chrome Sludge after Enzymatic Hydrolysis of Shavings with Additional Removal of Magnesium

Popis výsledku v původním jazyce

Chrome-tanned leather manufacture, so-called shavings are produced which represent a considerable volume of hazardous waste. One of the ways of its processing is the chemical mode (acid, alkaline or enzymatic hydrolysis). For a number of reasons, the method most suitable is the enzymatic, where a soluble collagen hydrolyzate and solid fraction (the so-called chrome cake) are formed. The utilization of this solid waste of high chrome content requires, in the first place, reducing the content of protein fraction contaminating the material. This process was mainly realized through multiple decantation with water (or with adapted pH for removing and recycling magnesium employed in hydrolysis). This path removed about 16 % protein fraction (free protein) and approx. 11 % magnesium. The quantity of washed-out Mg increased to 80% by adaptation of pH to 6.8. A 100% washing-out of magnesium and thus its separation from chromium may be expected to take place at pH = 6, however, this optimal valu

Název v anglickém jazyce

Contribution to Deproteination of Residual Chrome Sludge after Enzymatic Hydrolysis of Shavings with Additional Removal of Magnesium

Popis výsledku anglicky

Chrome-tanned leather manufacture, so-called shavings are produced which represent a considerable volume of hazardous waste. One of the ways of its processing is the chemical mode (acid, alkaline or enzymatic hydrolysis). For a number of reasons, the method most suitable is the enzymatic, where a soluble collagen hydrolyzate and solid fraction (the so-called chrome cake) are formed. The utilization of this solid waste of high chrome content requires, in the first place, reducing the content of protein fraction contaminating the material. This process was mainly realized through multiple decantation with water (or with adapted pH for removing and recycling magnesium employed in hydrolysis). This path removed about 16 % protein fraction (free protein) and approx. 11 % magnesium. The quantity of washed-out Mg increased to 80% by adaptation of pH to 6.8. A 100% washing-out of magnesium and thus its separation from chromium may be expected to take place at pH = 6, however, this optimal valu

Druh

D - Stať ve sborníku

CEP obor

DM - Tuhý odpad a jeho kontrola, recyklace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Technologies and Processes for Sustainab le Development and Pollution. Reduction/Prevention - book of abstracts

ISBN

80-214-2151-7

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

243-249

Název nakladatele

Vutium

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

14. 1. 2002

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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