Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes
Background: Mannosylerythritol lipids (MEL) are glycolipids with unique biosurfactant properties and are produced by Pseudozyma spp. from different substrates, preferably vegetable oils, but also sugars, glycerol or hydrocarbons. However, solvent intensive downstream processing and the relatively hi...
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BioMed Central
2015
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ftlneg:oai:repositorio.lneg.pt:10400.9/2669 2023-05-15T14:02:32+02:00 Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes Faria, Nuno Torres Santos, Marisa V. Ferreira, Carla Marques, Susana Ferreira, Frederico Castelo Fonseca, César 2015-03-24T17:15:37Z http://hdl.handle.net/10400.9/2669 eng eng BioMed Central http://dx.doi.org/10.1186/s12934-014-0155-7 Faria, N.T.; Santos, M.; Ferreira, C.; Marques, S.; Ferreira, F.C.; Fonseca, C. - Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes. In: Microbial Cell Factories, 2014, Vol. 13, p. 1-13 1475-2859 http://hdl.handle.net/10400.9/2669 openAccess Cellulosic materials Yeasts Wheat Straw Biosurfactants Pseudozyma spp Lipids article 2015 ftlneg https://doi.org/10.1186/s12934-014-0155-7 2022-12-14T01:03:13Z Background: Mannosylerythritol lipids (MEL) are glycolipids with unique biosurfactant properties and are produced by Pseudozyma spp. from different substrates, preferably vegetable oils, but also sugars, glycerol or hydrocarbons. However, solvent intensive downstream processing and the relatively high prices of raw materials currently used for MEL production are drawbacks in its sustainable commercial deployment. The present work aims to demonstrate MEL production from cellulosic materials and investigate the requirements and consequences of combining commercial cellulolytic enzymes and Pseudozyma spp. under separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) processes. Results: MEL was produced from cellulosic substrates, Avicel® as reference (>99% cellulose) and hydrothermally pretreated wheat straw, using commercial cellulolytic enzymes (Celluclast 1.5 L® and Novozyme 188®) and Pseudozyma antarctica PYCC 5048T or Pseudozyma aphidis PYCC 5535T. The strategies included SHF, SSF and fed-batch SSF with pre-hydrolysis. While SSF was isothermal at 28°C, in SHF and fed-batch SSF, yeast fermentation was preceded by an enzymatic (pre-)hydrolysis step at 50°C for 48 h. Pseudozyma antarctica showed the highest MEL yields from both cellulosic substrates, reaching titres of 4.0 and 1.4 g/l by SHF of Avicel® and wheat straw (40 g/l glucan), respectively, using enzymes at low dosage (3.6 and 8.5 FPU/gglucan at 28°C and 50°C, respectively) with prior dialysis. Higher MEL titres were obtained by fed-batch SSF with pre-hydrolysis, reaching 4.5 and 2.5 g/l from Avicel® and wheat straw (80 g/l glucan), respectively. Conclusions: This work reports for the first time MEL production from cellulosic materials. The process was successfully performed through SHF, SSF or Fed-batch SSF, requiring, for maximal performance, dialysed commercial cellulolytic enzymes. The use of inexpensive lignocellulosic substrates associated to straightforward downstream processing from sugary broths is ... Article in Journal/Newspaper Antarc* Antarctica Laboratório Nacional de Energia e Geologia: Repositório Científico do LNEG Microbial Cell Factories 13 1 |
institution |
Open Polar |
collection |
Laboratório Nacional de Energia e Geologia: Repositório Científico do LNEG |
op_collection_id |
ftlneg |
language |
English |
topic |
Cellulosic materials Yeasts Wheat Straw Biosurfactants Pseudozyma spp Lipids |
spellingShingle |
Cellulosic materials Yeasts Wheat Straw Biosurfactants Pseudozyma spp Lipids Faria, Nuno Torres Santos, Marisa V. Ferreira, Carla Marques, Susana Ferreira, Frederico Castelo Fonseca, César Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes |
topic_facet |
Cellulosic materials Yeasts Wheat Straw Biosurfactants Pseudozyma spp Lipids |
description |
Background: Mannosylerythritol lipids (MEL) are glycolipids with unique biosurfactant properties and are produced by Pseudozyma spp. from different substrates, preferably vegetable oils, but also sugars, glycerol or hydrocarbons. However, solvent intensive downstream processing and the relatively high prices of raw materials currently used for MEL production are drawbacks in its sustainable commercial deployment. The present work aims to demonstrate MEL production from cellulosic materials and investigate the requirements and consequences of combining commercial cellulolytic enzymes and Pseudozyma spp. under separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) processes. Results: MEL was produced from cellulosic substrates, Avicel® as reference (>99% cellulose) and hydrothermally pretreated wheat straw, using commercial cellulolytic enzymes (Celluclast 1.5 L® and Novozyme 188®) and Pseudozyma antarctica PYCC 5048T or Pseudozyma aphidis PYCC 5535T. The strategies included SHF, SSF and fed-batch SSF with pre-hydrolysis. While SSF was isothermal at 28°C, in SHF and fed-batch SSF, yeast fermentation was preceded by an enzymatic (pre-)hydrolysis step at 50°C for 48 h. Pseudozyma antarctica showed the highest MEL yields from both cellulosic substrates, reaching titres of 4.0 and 1.4 g/l by SHF of Avicel® and wheat straw (40 g/l glucan), respectively, using enzymes at low dosage (3.6 and 8.5 FPU/gglucan at 28°C and 50°C, respectively) with prior dialysis. Higher MEL titres were obtained by fed-batch SSF with pre-hydrolysis, reaching 4.5 and 2.5 g/l from Avicel® and wheat straw (80 g/l glucan), respectively. Conclusions: This work reports for the first time MEL production from cellulosic materials. The process was successfully performed through SHF, SSF or Fed-batch SSF, requiring, for maximal performance, dialysed commercial cellulolytic enzymes. The use of inexpensive lignocellulosic substrates associated to straightforward downstream processing from sugary broths is ... |
format |
Article in Journal/Newspaper |
author |
Faria, Nuno Torres Santos, Marisa V. Ferreira, Carla Marques, Susana Ferreira, Frederico Castelo Fonseca, César |
author_facet |
Faria, Nuno Torres Santos, Marisa V. Ferreira, Carla Marques, Susana Ferreira, Frederico Castelo Fonseca, César |
author_sort |
Faria, Nuno Torres |
title |
Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes |
title_short |
Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes |
title_full |
Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes |
title_fullStr |
Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes |
title_full_unstemmed |
Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes |
title_sort |
conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by pseudozyma spp. under shf and ssf processes |
publisher |
BioMed Central |
publishDate |
2015 |
url |
http://hdl.handle.net/10400.9/2669 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://dx.doi.org/10.1186/s12934-014-0155-7 Faria, N.T.; Santos, M.; Ferreira, C.; Marques, S.; Ferreira, F.C.; Fonseca, C. - Conversion of cellulosic materials into glycolipid biosurfactants, mannosylerythritol lipids, by Pseudozyma spp. under SHF and SSF processes. In: Microbial Cell Factories, 2014, Vol. 13, p. 1-13 1475-2859 http://hdl.handle.net/10400.9/2669 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1186/s12934-014-0155-7 |
container_title |
Microbial Cell Factories |
container_volume |
13 |
container_issue |
1 |
_version_ |
1766272846054555648 |