Paper Enzyme of Xylanase SUKAXy ALK

Xylanase Enzyme SUKAXy ALK

INTRODUCTION
Dylan is a hemicellulose with a homopolymer backbone of xylose units that are linked by β-1,4 glycosidic bonds. The xylan structure is linked with the lignin and pectin components which gives protection to the cellulose matrix. During cooking of pulps, the xylan is partially dissolved, modified and re-precipitates onto the fibre surface. The overall result of xylanase application is improved bleachability of the pulp with resulting reduction in usage of bleaching chemicals.

DESCRIPTION
SUKAXy ALK is an alkaline xylanase preparation that degrades xylan. The principal active ingredient of SUKAXy ALK is xylanase (endo-1,4-β-xylanase, EC 3.2.1.8), an enzyme that degrades and solubilizes plant xylans.

SUKAXy ALK is a product derived from the submerged fermentation of a high xylanase producing

strain for the paper and pulp industry and is particularly suited to the elevated temperatures and alkaline pH of kraft pulps.

WORKING MECHANISM
The major enzymes responsible for the hydrolysis of xylan are xylanase (endo 1,4-α-D-xylanohydrolase, EC 3.2.1.8) and α-xylosidase (1,4-β-D-xylohydrolase, EC 3.2.1.37). Xylanase (1,4- D-xylan xylanhydrolase) catalyzes the random hydrolysis of 1,4- α-D-xylosidic linkages  within the xylan structure thereby releasing xylo-oligosaccharides and xylobioses. β-xylosidase hydrolyzes xylobiose and small xylooligosaccharides to xylose (5 carbon sugar).

PROPERTIES
SUKAXy ALK xylanase is effective over the pH range 6 to 10 and temperature
range 35 to 65.

SUKAXy ALK is a light yellow powder with a density of 1.1 g/mL. It is readily
miscible with water.

SPECIFICATION
SUKAXy ALY  is available in liquid preparation as:
SUKAXy ALY LQ 85 (with  enzyme activity of 85,000 U/mL)
SUKAXy ALY LQ 17 (with  enzyme activity of 17,000 U/mL)

Unit definition: The amount of enzyme needed to produce 1 ug xylose from xylan in one minute at specified conditions. The xylanase units are determined on birchwood soluble xylan at pH 6 and 50 over a 20 minute period.

APPLICATION GUIDE
SUKAXy ALK xylanase can be added to pulp after cooking or oxygen delignification and prior to bleaching for the improvement of pulp bleachability. Almost every mill has unique conditions of fibre furnish, pulping technology and bleach sequence. The optimal dosage can also depend on the temperature, pH and consistency of the pulp.

For the paper making industry, SUKAXy ALK is added based on the instructions of the technicians.

PACKAGING
SUKAXy ALK is packaged in 25 kg/plastic drum.

Alternative packaging is available upon request for smaller or larger volumes.

STORAGE
Store in a cool, dry place and away from direct sunlight. SUKAXy ALK maintains its activity for considerably longer time when stored at lower temperatures (below 25). The product should not be frozen.

HANDLING PRECAUTIONS
SUKAXy ALK is non-toxic and biodegradable. However, unnecessary contact with the product should be avoided. Long term exposure to protein based products such as SUKAXy ALK may sensitize certain individuals to the product. Wash hands with warm soapy water after handling. Keep out of reach of children.