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Sallat M.,Sachsisches Textilforschungsinstitut e.V. STFI | Berthel A.,Sachsisches Textilforschungsinstitut e.V. STFI | Bohmer U.,Institute For Lebensmittel Und Bioverfahrenstechnik | Bley T.,Institute For Lebensmittel Und Bioverfahrenstechnik
Melliand Textilberichte | Year: 2010

The effectiveness of enzyme application in industrial processes can be clearly increased as soon as the activity potential of the enzymes are better fully utilized by multiple use. In the framework of an R & D project, it was shown that the exhaustion of optimization potentials in the reactive afterwashings and the compliance with quality standards in the form of fastness requirements are not tied to the singular application of enzymes. Source


Sallat M.,Sachsisches Textilforschungsinstitut e.V. STFI | Berthel A.,Sachsisches Textilforschungsinstitut e.V. STFI | Bohmer U.,Institute For Lebensmittel Und Bioverfahrenstechnik | Bley T.,Institute For Lebensmittel Und Bioverfahrenstechnik
Melliand International | Year: 2010

It could be demonstrated that the synthesis of new hydrogel beads consisting of poly-Nisopropylacrylamid (PNIPAm) with simultaneous immobilization of enzymes (entrapment during polymerization) allows the achievement of unique enzyme activities in the particles. This increases the space-time yield and enlarges the possibilities to apply immobilized enzymes in technical processes by far. Especially for the finishing treatment of dyed or printed textiles with reactive dyes it could be shown that a process optimization concerning water-, energy- and time-consumption is not only possible by the use of free enzymes but also by using immobilized enzymes. The washing processes were reorganized and enzymes were applied directly in the washing baths to eliminate remaining color. Moreover, experimental work regarding the recycling of enzymes proved that process optimization is not bound to a single use of enzymes. Even by a threefold application of enzymes the requirements on textile fastness were fulfilled. A critical field was the recovery of the immobilized enzymes, as the particles tended to stick to surfaces (e.g. textiles, machine parts). Due to this behavior there is the risk to withdraw enzymes from the system "washing bath" or to damage enzymes by changes in temperatures or pH values. In case of continuous finishing treatment the application of immobilized enzymes would be possible - without obtaining a disadvantage from their adsorptive properties. Using a separate enzymatic bath, both the temperature and the pH would be adjustable within optimal ranges and the adsorption to the machine parts would be of no interest. When the textile material leaves the bath an efficient rinsing would be of high importance. Further research to apply such a kind of process management is required. Source

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