Recycling of textile bleaching effluents for dyeing using immobilized catalase |
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Authors: | Silgia A Costa Tzanko Tzanov Filipa Carneiro Georg M Gübitz Artur Cavaco-Paulo |
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Institution: | (1) Department of Textile Engineering, University of Minho, 4810 Guimarães, Portugal;(2) Department of Environmental Biotechnology, Graz University of Technology, 8010 Graz, Austria |
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Abstract: | Catalase was immobilized on alumina carrier and crosslinked with glutaraldehyde. Storing stability, temperature and pH profiles of enzyme activity were studied in a column reactor with recirculation and in a batch stirred-tank reactor. The immobilized enzyme retained 44% of its activity at pH 11, 30 °C and 90% at 80 °C, pH 7. The half-life time of the immobilized catalase was increased to 2 h at pH 12, and 60 °C. Acceptable results were achieved when the residual water from the washing process of H2O2-bleached fabrics was treated with the immobilized enzyme and then reused for dyeing. |
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Keywords: | catalase immobilization enzyme stabilization H2O2 textile dyeing |
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