Enzymes are
used in the textile industry because, they speed up reactions, act only on
precise substrates, functions in gentle conditions, are safe and easy to run,
can substitute callous chemicals and are biodegradable.
Catalase is an enzyme extensively distributed in nature and well identified for its capability to catalyze the conversion of hydrogen peroxide to water and gaseous oxygen. An illustration for the catalytic power of enzymes is the action of catalase; one molecule of this enzyme can change five million molecules of hydrogen peroxide to water and oxygen in one minute. This enzyme will transpire in roughly all aerobically respiring organism and serves to defend the cells from the noxious effects of hydrogen peroxide. It has found abundant applications in food science, industrial food production, medical and analytical fields.
Viable products containing catalase for textile applications are also accessible. These have been used to decay residual hydrogen peroxide in fabric prior to dyeing, and are normally functional after draining the bleaching bath and refilling it with fresh water. However, restrictions are imposed by the low temperature and alkali constancy of the enzyme.
Bleach cleanup
In predictable process generally, bleaching of cellulose fibers with hydrogen peroxide is finest at a pH of 10.5 to 11, at a temperature between 80 and 100°C, and for a contact point between 45 - 60 minutes. After completion of the procedure the bleached liquid was drained out, then the fabric was rinsed with water a number of times to eliminate the H2O2 from the bleached fabric. Instead, a kind reducing agent can be used to defuse the bleach. In either case, huge amount of water (up to 40 liters per kg of fabric) are required for rinsing, which outcome in discharge of a large amount of wastewater.
An enzyme can be used to substitute a chemical agent in bleach neutralization leading to diminution in water and energy consumption. Enzymes offer a more suitable alternative because they are easier and more rapidly to use. Compared with the traditional clean-up method, the enzymatic progression outcome in condensed water consumption and abridged energy consumption.
The diverse advantages of using the enzyme are that there is no:
Catalase is an enzyme extensively distributed in nature and well identified for its capability to catalyze the conversion of hydrogen peroxide to water and gaseous oxygen. An illustration for the catalytic power of enzymes is the action of catalase; one molecule of this enzyme can change five million molecules of hydrogen peroxide to water and oxygen in one minute. This enzyme will transpire in roughly all aerobically respiring organism and serves to defend the cells from the noxious effects of hydrogen peroxide. It has found abundant applications in food science, industrial food production, medical and analytical fields.
Viable products containing catalase for textile applications are also accessible. These have been used to decay residual hydrogen peroxide in fabric prior to dyeing, and are normally functional after draining the bleaching bath and refilling it with fresh water. However, restrictions are imposed by the low temperature and alkali constancy of the enzyme.
Bleach cleanup
In predictable process generally, bleaching of cellulose fibers with hydrogen peroxide is finest at a pH of 10.5 to 11, at a temperature between 80 and 100°C, and for a contact point between 45 - 60 minutes. After completion of the procedure the bleached liquid was drained out, then the fabric was rinsed with water a number of times to eliminate the H2O2 from the bleached fabric. Instead, a kind reducing agent can be used to defuse the bleach. In either case, huge amount of water (up to 40 liters per kg of fabric) are required for rinsing, which outcome in discharge of a large amount of wastewater.
An enzyme can be used to substitute a chemical agent in bleach neutralization leading to diminution in water and energy consumption. Enzymes offer a more suitable alternative because they are easier and more rapidly to use. Compared with the traditional clean-up method, the enzymatic progression outcome in condensed water consumption and abridged energy consumption.
The diverse advantages of using the enzyme are that there is no:
· Unpleasant
effect on dyestuffs
·
Need for
heating
·
Need for
rinsing former to dyeing
· Threat of
harmful overdosing
·
Formation of
by-product in wastewater
Goodrich's product range for Textile Enzymes & Enzymes Derivatives helps to degrade the excess hydrogen peroxide.
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