Cyanobacteria immobilised in porous silica gels: Exploring biocompatible synthesis routes for the development of photobioreactors

Research output: Contribution to journalArticle

Abstract

With the aim of designing photobioreactors (PBR) based on a smart exploitation of microalgae for the production of biofuels and metabolites of interest, this paper describes a novel approach where cyanobacteria are entrapped within highly porous silica matrices. With this concept, it would be possible to work with a constant population of organisms for a continuous (and increased) photoproduction of metabolites, in contrast to "one-shot" uses of liquid cultures. Different hybrid materials based on porous silica gels are described with a special emphasis on finding the most appropriate immobilisation conditions for prolonged cell survival. It is found that an aqueous route based on acid-exchanged sodium silicate combined with the use of silica nanoparticles as a gel-strengthening species shows the best results with a high primary production rate post immobilisation and a preservation of the photosynthetic pigments of up to 35 weeks. Oxygen production, though very low, could be evidenced up to 17 weeks after entrapment, demonstrating the suitability of using porous silica matrices in PBR design.
Original languageEnglish
Pages (from-to)370-377
Number of pages8
JournalEnergy and Environmental Science
Volume3
Issue number3
DOIs
Publication statusPublished - 1 Jan 2010

Fingerprint

Photobioreactors
Silica Gel
Silica gel
Silicon Dioxide
cyanobacterium
gel
silica
Silica
Metabolites
immobilization
metabolite
Biofuels
Hybrid materials
Pigments
matrix
Silicates
Gels
Cells
Sodium
biofuel

Cite this

@article{106590f4e4f4461583665c85d7c26427,
title = "Cyanobacteria immobilised in porous silica gels: Exploring biocompatible synthesis routes for the development of photobioreactors",
abstract = "With the aim of designing photobioreactors (PBR) based on a smart exploitation of microalgae for the production of biofuels and metabolites of interest, this paper describes a novel approach where cyanobacteria are entrapped within highly porous silica matrices. With this concept, it would be possible to work with a constant population of organisms for a continuous (and increased) photoproduction of metabolites, in contrast to {"}one-shot{"} uses of liquid cultures. Different hybrid materials based on porous silica gels are described with a special emphasis on finding the most appropriate immobilisation conditions for prolonged cell survival. It is found that an aqueous route based on acid-exchanged sodium silicate combined with the use of silica nanoparticles as a gel-strengthening species shows the best results with a high primary production rate post immobilisation and a preservation of the photosynthetic pigments of up to 35 weeks. Oxygen production, though very low, could be evidenced up to 17 weeks after entrapment, demonstrating the suitability of using porous silica matrices in PBR design.",
author = "A. L{\'e}onard and J.C. Rooke and C.F. Meunier and B.-L. Su and H. Sarmento and J.-P. Descy",
note = "Copyright 2010 Elsevier B.V., All rights reserved.",
year = "2010",
month = "1",
day = "1",
doi = "10.1039/b923859j",
language = "English",
volume = "3",
pages = "370--377",
journal = "Energy and Environmental Science",
issn = "1754-5692",
publisher = "Royal Society of Chemistry",
number = "3",

}

TY - JOUR

T1 - Cyanobacteria immobilised in porous silica gels

T2 - Exploring biocompatible synthesis routes for the development of photobioreactors

AU - Léonard, A.

AU - Rooke, J.C.

AU - Meunier, C.F.

AU - Su, B.-L.

AU - Sarmento, H.

AU - Descy, J.-P.

N1 - Copyright 2010 Elsevier B.V., All rights reserved.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - With the aim of designing photobioreactors (PBR) based on a smart exploitation of microalgae for the production of biofuels and metabolites of interest, this paper describes a novel approach where cyanobacteria are entrapped within highly porous silica matrices. With this concept, it would be possible to work with a constant population of organisms for a continuous (and increased) photoproduction of metabolites, in contrast to "one-shot" uses of liquid cultures. Different hybrid materials based on porous silica gels are described with a special emphasis on finding the most appropriate immobilisation conditions for prolonged cell survival. It is found that an aqueous route based on acid-exchanged sodium silicate combined with the use of silica nanoparticles as a gel-strengthening species shows the best results with a high primary production rate post immobilisation and a preservation of the photosynthetic pigments of up to 35 weeks. Oxygen production, though very low, could be evidenced up to 17 weeks after entrapment, demonstrating the suitability of using porous silica matrices in PBR design.

AB - With the aim of designing photobioreactors (PBR) based on a smart exploitation of microalgae for the production of biofuels and metabolites of interest, this paper describes a novel approach where cyanobacteria are entrapped within highly porous silica matrices. With this concept, it would be possible to work with a constant population of organisms for a continuous (and increased) photoproduction of metabolites, in contrast to "one-shot" uses of liquid cultures. Different hybrid materials based on porous silica gels are described with a special emphasis on finding the most appropriate immobilisation conditions for prolonged cell survival. It is found that an aqueous route based on acid-exchanged sodium silicate combined with the use of silica nanoparticles as a gel-strengthening species shows the best results with a high primary production rate post immobilisation and a preservation of the photosynthetic pigments of up to 35 weeks. Oxygen production, though very low, could be evidenced up to 17 weeks after entrapment, demonstrating the suitability of using porous silica matrices in PBR design.

UR - http://www.scopus.com/inward/record.url?scp=77951427148&partnerID=8YFLogxK

U2 - 10.1039/b923859j

DO - 10.1039/b923859j

M3 - Article

AN - SCOPUS:77951427148

VL - 3

SP - 370

EP - 377

JO - Energy and Environmental Science

JF - Energy and Environmental Science

SN - 1754-5692

IS - 3

ER -