Naslov
Thermal and enzymatic recovering of proteins from untanned leather waste

Autori
Bajza, Željko ; Vrček, Valerije

Izvornik
Waste Management (0956-053X) 21 (2001); 79-84

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
leather; waste; proteins; thermal; enzymatic; flour

Sažetak
The laboratory trials of process to treat untanned leather waste to isolate valuble protein products are presented. In this comparative study. Both thermal and enzymatic treatments of leather waste were performed. The enzymatic method utilizes comecially avalilable alkaline protease at moderate temperatures and for short periods of time. The concentration of the enzyme was 500 units per gram of leather waste which makes the method cost-efective. Amino acid composition in the hydrdolysate obtained by the enzyme hydrloysis of untanned leather waste is determined. Chemical and physical properties of protein powder products from untanned leather waste were evaluated by spectrophotometric and chromatographic methods and by use of electron microscope. The results of microbiological assays confirm that these products agree to food safety standards. This relatively simple treatment of untanned leather waste may provide a practical and economical solution to the disposal of potentially dangerous waste.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA