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Exopolysaccharide (pullulan) production from sugarcane bagasse hydrolysate aiming to favor the development of biorefineries
- Source :
- International Journal of Biological Macromolecules. 127:169-177
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Pullulan is a biopolymer used in food industry produced by Aureobasidium pullulans from starch. In the present work, sugarcane bagasse (SCB) hydrolysate was evaluated as an alternative substrate in fermentation process assisted by blue LED lights. The best fermentation conditions in Erlenmeyer flasks were 25.3 °C, stirring speed of 232 rpm and yeast extract concentration of 1.88 g/L, yielding 25.19 g/L of pullulan, that corresponded to yield of 0.48 g/g and 0.28 g/(L·h) of volumetric productivity. By using a column bubble photobioreactor, similar yield values were obtained. Thermal properties of the produced pullulan as glass transition (Tg) and melting (Tm) temperatures were 38 °C and 160 °C, respectively, which were similar to the corresponding values of commercial food grade pullulan. Therefore, SCB hydrolysate is a promising substrate to produce good quality pullulan (86% of purity) with application in food industry, besides to represent a new alternative for biorefineries.
- Subjects :
- Starch
Photobioreactor
02 engineering and technology
Biochemistry
Hydrolysate
03 medical and health sciences
chemistry.chemical_compound
Ascomycota
Structural Biology
Yeast extract
Food science
Cellulose
Glucans
Molecular Biology
030304 developmental biology
0303 health sciences
biology
Chemistry
Pullulan
General Medicine
021001 nanoscience & nanotechnology
biology.organism_classification
Saccharum
Aureobasidium pullulans
Fermentation
0210 nano-technology
Bagasse
Subjects
Details
- ISSN :
- 01418130
- Volume :
- 127
- Database :
- OpenAIRE
- Journal :
- International Journal of Biological Macromolecules
- Accession number :
- edsair.doi.dedup.....8e79ec8cadc264858c80e18f40ace6af