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YD-PE89 Xylanase for Bleaching Paper Pulps

Category:Enzyme for Pulp and Paper Industry
Number of views:38
发布时间：2026-01-16 00:00:00

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Product overview

INTRODUCTION

YD-PE89 Xylanase is an enzyme that degrades xylanase.
YD-PE89 is specific for xylan and does not degrade cellulose.
Xylanases produced by different microorganisms operate optimally over a range of pH and temperature.
YD-PE89 was developed from a proprietary strain of bacterium for the paper pulp industry.
YD-PE89 is particularly suited to the elevated temperatures and alkaline pH of kraft pulps.

APPLICATION
YD-PE89 xylanase can be added to pulp after cooking or oxygen delignification and prior to bleaching for the improvement of pulp bleachability.
Dosage：135-150g/ T pulp (o.d.basis)
Pulp properties：pH between 6.5 and9.5
Temperature: between 45 and 55℃
Pulp consistency: between 6 and 10% (recommended 8%)
Residence time：above 1 hour

TECHNOLOGICAL ADVANTAGE
YD-PE89 acts as a pre-bleaching aid for paper pulps. YD-PE89 has specific advantages in that it is stable and active at the alkaline pH and elevated temperatures typical of kraft pulps.
The main driving factors for acceptance of this technology in pulp mills have been the economic and environmental advantages over chemical bleaching.

YD-PE89 used as a pre-bleaching agent for wood and non-woody pulps can reduce chemical bleach consumption from between 15 to 50%.