alexa Xylanase production by thermophilic Bacillus licheniformis A99 in solid-state fermentation


Fermentation Technology

Author(s): T Satyanarayana

Abstract Share this page

The production of extracellular thermostable cellulase-free xylanase (EC by Bacillus licheniformis A99 was studied in solid-state fermentation (SSF). Wheat bran was found to be the best substrate [16.3 U g−1 dry bacterial bran (DBB)] among a few easily available lignocellulosics tested. The production of xylanase reached a peak in 72 h (16.8 U g−1 DBB). A high level of enzyme (17.1 U g−1 DBB) was produced in wheat bran moistened with tap water at a substrate-to-moistening agent ratio of 1:2.5 (w/v). The optimum temperature for xylanase production was 50°C. An elevated water activity suited the enzyme production most. Maximum enzyme production was recorded in an aerated glass column reactor (19.13 U g−1 DBB). Repression by glucose was not evident in SSF even at 6% while it was seen in submerged fermentation (SmF) at or beyond 2%. Cultivation in large enamel trays yielded a xylanase titer (15–17 U g−1 DBB in 72 h) that was comparable to that in flasks. The enzyme production was 22-fold higher in SSF than that in SmF. This is the first report on xylanase production by a thermophilic bacterial strain in SSF. This article was published in Enzyme and Microbial Technology and referenced in Fermentation Technology

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

1-702-714-7001Extn: 9037

Business & Management Journals


1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

1-702-714-7001 Extn: 9042

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version