In addition to xylanases, other hemicellulases have also been tested as bleaching
aids. Among these enzymes, mannanases have been shown to facilitate bleaching,
eliminating residual lignin, and increasing paper brightness [111, 167] in a similar
way to that of xylanases but by removing the mannan component of the wood.
However, compared to that of xylanases, the effect of mannanases is often less
pronounced [1, 168].
6.2 Detergent
Enzymes, which degrade organic dirt, are known to boost the cleaning performance
of detergents. This performance-enhancing nature has been the major impetus for
developing a variety of enzymes for detergent applications. Today, this sector has
emerged as one of the most important commercial segments absorbing nearly 30%
of the total enzyme market value. Due to the alkaline nature of detergents, enzymes
intended for this application should be primarily operationally stable in high pH
condition. Alkaliphiles, which are the prominent sources of alkaline active enzymes,
have been serving as the major sources of detergent enzymes. Traditionally, alkaline
active proteases, amylases, and cellulases have been the dominant detergent
enzymes. However, in recent years, alkaline active hemicellulases such as
mannanases are also emerging as detergent enzymes.
Cleaning botanical and mold dirt is a challenge, especially when the washing
temperature is low and the cycles are shorter. Stains from tomato, orange, tea, coffee,
banana, mango, broccoli, grass, etc. contain hemicelluloses and are often difficult to
effectively clean. However, the use of detergents containing enzymes that degrade
these hemicelluloses can remove such though stains with remarkable efficiency
[169, 170]. For instance, mannan is common in food such as those prepared from
legume seeds and food containing gelling agents and thickeners like locust bean gum
and guar gum. Mannans in such food attach dirt due to its sticky nature and make
stains which are not easy to clean. But the use of alkaline active mannanases
containing detergent on the spot can degrade the mannan and remove the attached
dirt and clean the stains efficiently [171]. Hence, it is beneficial to use detergents
containing mannanases to effectively clean dishes and clothes soiled with such food.
Today, mannanases are known in the detergent industry as stain removers. The use
of alkaline active xylanases in detergents would also improve the removal of
botanical dirt such as grass, fruit, and vegetable stains [2]. In fact, it has been
observed that the use of alkaline active xylanases boosts the washing performance
of detergents [154, 170, 172].
Alkaline Active Hemicellulases
273
aids. Among these enzymes, mannanases have been shown to facilitate bleaching,
eliminating residual lignin, and increasing paper brightness [111, 167] in a similar
way to that of xylanases but by removing the mannan component of the wood.
However, compared to that of xylanases, the effect of mannanases is often less
pronounced [1, 168].
6.2 Detergent
Enzymes, which degrade organic dirt, are known to boost the cleaning performance
of detergents. This performance-enhancing nature has been the major impetus for
developing a variety of enzymes for detergent applications. Today, this sector has
emerged as one of the most important commercial segments absorbing nearly 30%
of the total enzyme market value. Due to the alkaline nature of detergents, enzymes
intended for this application should be primarily operationally stable in high pH
condition. Alkaliphiles, which are the prominent sources of alkaline active enzymes,
have been serving as the major sources of detergent enzymes. Traditionally, alkaline
active proteases, amylases, and cellulases have been the dominant detergent
enzymes. However, in recent years, alkaline active hemicellulases such as
mannanases are also emerging as detergent enzymes.
Cleaning botanical and mold dirt is a challenge, especially when the washing
temperature is low and the cycles are shorter. Stains from tomato, orange, tea, coffee,
banana, mango, broccoli, grass, etc. contain hemicelluloses and are often difficult to
effectively clean. However, the use of detergents containing enzymes that degrade
these hemicelluloses can remove such though stains with remarkable efficiency
[169, 170]. For instance, mannan is common in food such as those prepared from
legume seeds and food containing gelling agents and thickeners like locust bean gum
and guar gum. Mannans in such food attach dirt due to its sticky nature and make
stains which are not easy to clean. But the use of alkaline active mannanases
containing detergent on the spot can degrade the mannan and remove the attached
dirt and clean the stains efficiently [171]. Hence, it is beneficial to use detergents
containing mannanases to effectively clean dishes and clothes soiled with such food.
Today, mannanases are known in the detergent industry as stain removers. The use
of alkaline active xylanases in detergents would also improve the removal of
botanical dirt such as grass, fruit, and vegetable stains [2]. In fact, it has been
observed that the use of alkaline active xylanases boosts the washing performance
of detergents [154, 170, 172].
Alkaline Active Hemicellulases
273