Improving enzymatic digestibility of wheat straw pretreated by a cellulase-free xylanase-secreting Pseudomonas boreopolis G22 with simultaneous production of bioflocculants.

ABSTRACT:

Background

Xylan removal by bacterial pretreatments has been confirmed to increase the digestibility of biomass. Here, an effective xylan removal technique has been developed to enhance the digestibility of wheat straw and simultaneously produce bioflocculants by a cellulase-free xylanase-secreting strain, Pseudomonas boreopolis G22.

Results

The results indicated that P. boreopolis G22 is an alkaliphilic strain which can secrete abundant amounts of xylanase. This xylanase had activity levels of 2.67-1.75 U mL^-1 after an incubation period of 5-25 days. The xylanase showed peak activity levels at pH 8.6, and retained more than 85% relative activity in the pH range of 7.2-9.8. After 15 days of cultivation, the hemicellulose contents of the wheat straw w

SUBMITTER: Guo H 

PROVIDER: S-EPMC6142706 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature