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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Production of Bacillus amyloliquefaciens OG and its metabolites in renewable media: valorisation for biodiesel production and p-xylene decontamination

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Author(s):
Etchegaray, Augusto ; Coutte, Francois ; Chataigne, Gabrielle ; Bechet, Max ; dos Santos, Ramon H. Z. ; Leclere, Valerie ; Jacques, Philippe
Total Authors: 7
Document type: Journal article
Source: Canadian Journal of Microbiology; v. 63, n. 1, p. 46-60, JAN 2017.
Web of Science Citations: 4
Abstract

Biosurfactants are important in many areas; however, costs impede large-scale production. This work aimed to develop a global sustainable strategy for the production of biosurfactants by a novel strain of Bacillus amyloliquefaciens. Initially, Bacillus sp. strain 0G was renamed B. amyloliquefaciens subsp. plantarum (syn. Bacillus velezensis) after analysis of the gyrA and gyrB DNA sequences. Growth in modified Landy's medium produced 3 main recoverable metabolites: surfactin, fengycin, and acetoin, which promote plant growth. Cultivation was studied in the presence of renewable carbon (as glycerol) and nitrogen (as arginine) sources. While diverse kinetics of acetoin production were observed in different media, similar yields (6-8 g.L-1) were obtained after 72 h of growth. Glycerol increased surfactin-specific production, while arginine increased the yields of surfactin and fengycin and increased biomass significantly. The specific production of fengycin increased similar to 10 times, possibly due to a connecting pathway involving arginine and ornithine. Adding value to crude extracts and biomass, both were shown to be useful, respectively, for the removal of p-xylene from contaminated water and for biodiesel production, yielding similar to 70 mg.g(-1) cells and glycerol, which could be recycled in novel media. This is the first study considering circular bioeconomy to lower the production costs of biosurfactants by valorisation of both microbial cells and their primary and secondary metabolites. (AU)

FAPESP's process: 13/20570-6 - Sustainable production of biosurfactants with applications for medicine and environmental remediation
Grantee:Augusto Etchegaray Junior
Support type: Regular Research Grants
FAPESP's process: 11/13174-1 - Co-production of biomass and biosurfactants from Bacillus subtilis recycling food and residues from microbial biomass and biodiesel synthesis
Grantee:Ramon Henrick Zorzeto dos Santos
Support type: Scholarships in Brazil - Scientific Initiation