1
|
Dhivert E, Pruvost J, Winiarski T, Gasperi J, Delor-Jestin F, Tassin B, Mourier B. Time-varying microplastic contributions of a large urban and industrial area to river sediments. Environ Pollut 2024; 347:123702. [PMID: 38432346 DOI: 10.1016/j.envpol.2024.123702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/05/2024]
Abstract
The quantification of microplastic (MP) pollution in rivers is often constrained by a lack of historical data on a multi-decadal scale, which hinders the evaluation of public policies. In this study, MP contents and trends were analyzed in dated sediment cores sampled upstream and downstream of a large metropolis, in environmental deposits that exhibited consistent sedimentation patterns from the 1980s to 2021. After a thorough sedimentological analysis, MPs were quantified in samples by micro Fourier Transform InfraRed spectroscopy (μFTIR imaging) and a density separation and organic matter digestion procedure. Microplastics recorded in the upstream core are relatively ubiquitous all along the dated sequence. The results also confirmed a sever increase of microplastics levels in the downstream core, by one order of magnitude, and an increase of polymer types. Polypropylene, polyethylene, and polystyrene represent ubiquitous contamination and were predominant at the two stations, whereas polyvinyl chloride and polytetrafluoroethylene were suspected to be abundant at the downstream station, but were not detected at the upstream station. Their presence could be linked to local contamination from specific industrial sources that manufactured and utilized these polymers. Surprisingly, in the downstream station sediment has recorded a relative improvement in polymers associated with industrial sources since the 2000s and, to a lesser extent, for ubiquitous ones since the 2010s. This trend of mitigation diverges from that of global assessments, that assume uncontrolled MP pollution, and suggest that European Union wastewater policy and regulation on industrial discharges have positively influenced water quality, and certainly also on MPs. However, the accumulation of microplastics remains high in recent deposits and raises the emerging concern of the long-term management of these reservoirs.
Collapse
Affiliation(s)
- E Dhivert
- University of Lyon, University Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69518, Vaulx-en-Velin, France; University of Tours, EA 6293 GeHCO, F-37200, Tours, France
| | - J Pruvost
- University of Lyon, University Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69518, Vaulx-en-Velin, France
| | - T Winiarski
- University of Lyon, University Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69518, Vaulx-en-Velin, France
| | - J Gasperi
- University Gustave Eiffel, GERS-LEE IFSTTAR, F-44344, Bouguenais, France
| | - F Delor-Jestin
- University of Clermont-Ferrand, Clermont Auvergne INP-Sigma Clermont, CNRS, ICCF, UMR 6296, F-63177, Aubière, France
| | - B Tassin
- École des Ponts ParisTech, LEESU, F-77455, Marne-la-Vallée, France
| | - B Mourier
- University of Lyon, University Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69518, Vaulx-en-Velin, France.
| |
Collapse
|
2
|
Samhat K, Kazbar A, Takache H, Ismail A, Pruvost J. Influence of light absorption rate on the astaxanthin production by the microalga Haematococcus pluvialis during nitrogen starvation. BIORESOUR BIOPROCESS 2023; 10:78. [PMID: 38647902 PMCID: PMC10992552 DOI: 10.1186/s40643-023-00700-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/24/2023] [Indexed: 04/25/2024] Open
Abstract
Large amounts of astaxanthin (about 4% DW) can be produced under nitrogen starvation of Haematococcus pluvialis in photobioreactors (PBRs) exposed to high light conditions to induce a light stress. However, in PBR, the large biomass concentration usually achieved leads to strong light attenuation conditions, which makes complex the analysis of this "light stress". This study aims to elucidate the role of light transfer in astaxanthin cell content and productivity from the microalga Haematococcus pluvialis during nitrogen starvation. Haematococcus pluvialis was cultivated in a flat-panel PBR in a batch mode with sudden nitrogen starvation conditions and an incident photon flux density (PFD) of 250 µmolhν m-2 s-1. Different initial biomass concentrations ( C x 0 ) were evaluated, 0.21, 0.52, 1.39 and 2.21 kg m-3. As a result, spectral mass absorption cross-sections of Haematococcus pluvialis were measured at different times during nitrogen starvation, and were used to relate the mean rate of photon absorption (MRPA) to the astaxanthin productivity. A minimum initial MRPA of 7000 ± 500 µmolhν kgx-1 s-1 was found necessary to trigger large accumulation of astaxanthin in Haematococcus pluvialis cells (up to 3.21% DW) during nitrogen starvation conditions. The results also demonstrated the link between the MRPA and the daily astaxanthin productivity of Haematococcus pluvialis cultures, introducing then the MRPA as a physical quantity of interest for a rational optimization of the light culture conditions in PBRs.
Collapse
Affiliation(s)
- Khadija Samhat
- Oniris, CNRS, GEPEA, UMR 6144, Nantes University, 44600, Saint-Nazaire, France.
- Platform for Research and Analysis in Environmental Sciences, Doctoral School of Science and Technology, Lebanese University, Rafic Hariri Campus, Beirut, Lebanon.
| | - Antoinette Kazbar
- Algosource, 7 Rue Eugène Cornet, 44600, Saint-Nazaire, France
- Bioprocess Engineering, Wageningen University and Research, Wageningen, Netherlands
| | - Hosni Takache
- Bio-Information Research Laboratory (BIRL), The Higher Institute of Biotechnologies of Paris (Sup'biotech), 66 Rue Guy Môquet, 94800, Villejuif, France
| | - Ali Ismail
- Platform for Research and Analysis in Environmental Sciences, Doctoral School of Science and Technology, Lebanese University, Rafic Hariri Campus, Beirut, Lebanon
| | - Jeremy Pruvost
- Oniris, CNRS, GEPEA, UMR 6144, Nantes University, 44600, Saint-Nazaire, France
| |
Collapse
|
3
|
Rasheed R, Thaher M, Younes N, Bounnit T, Schipper K, Nasrallah GK, Al Jabri H, Gifuni I, Goncalves O, Pruvost J. Solar cultivation of microalgae in a desert environment for the development of techno-functional feed ingredients for aquaculture in Qatar. Sci Total Environ 2022; 835:155538. [PMID: 35489502 DOI: 10.1016/j.scitotenv.2022.155538] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
The demand for aquaculture feed will increase in the coming years in order to ensure food security for a growing global population. Microalgae represent a potential fish-feed ingredient; however, the feasibility of their sustainable production has great influence on its successful application. Geographical locations offering high light and temperature, such as Qatar, are ideal to cultivate microalgae with high productivities. For that, the environmental and biological interactions, including field and laboratory optimization, for solar production and application of two native microalgae, Picochlorum maculatum and Nannochloris atomus, were investigated as potential aquaculture feed ingredients. After validating pilot-scale outdoor cultivation, both strains were further investigated under simulated seasonal conditions using a thermal model to predict light and culture temperature cycles for the major climatic seasons in Qatar. Applied thermal and light variations ranged from 36 °C and 2049 μmol/m2/s in extreme summer, to as low as 15 °C and 1107 μmol/m2/s in winter, respectively. Biomass productivities of both strains varied significantly with maximum productivities of 32.9 ± 2.5 g/m2/d and 17.1 ± 0.8 g/m2/d found under moderate summer conditions for P. maculatum and N. atomus, respectively. These productivities were significantly reduced under both extreme summer, as well as winter conditions. To improve annual biomass productivities, the effect of implementation of a simple ground heat exchanger for thermal regulation of raceway ponds was also studied. Biomass productivities increased significantly, during extreme seasons due to respective cooling and heating of the culture. Both strains produced high amounts of proteins during winter, 54.5 ± 0.55% and 44 ± 2.25%, while lipid contents were high during summer reaching up to 29.6 ± 0.75 and 28.65 ± 0.65%, for P. maculatum and N. atomus respectively. Finally, using acute toxicity assay with zebra fish embryos, both strains showed no toxicity even at the highest concentrations tested, and is considered safe for use as feed ingredient and to the environment.
Collapse
Affiliation(s)
- Rihab Rasheed
- Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar.
| | - Mahmoud Thaher
- Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Nadin Younes
- Biomedical Research Center, Qatar University, Doha 2713, Qatar; Department of Biomedical Sciences, College of Health Sciences, Member of QU Health, Qatar University, Doha 2713, Qatar
| | - Touria Bounnit
- Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Kira Schipper
- Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Gheyath K Nasrallah
- Biomedical Research Center, Qatar University, Doha 2713, Qatar; Department of Biomedical Sciences, College of Health Sciences, Member of QU Health, Qatar University, Doha 2713, Qatar
| | - Hareb Al Jabri
- Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar; Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Imma Gifuni
- Algosource Technologies, 7, Rue Eugène Cornet, 44600 Saint-Nazaire, France
| | - Olivier Goncalves
- CNRS, GEPEA, UMR 6144, Université de Nantes, Oniris, F-44600 Saint-Nazaire, France
| | - Jeremy Pruvost
- CNRS, GEPEA, UMR 6144, Université de Nantes, Oniris, F-44600 Saint-Nazaire, France
| |
Collapse
|
4
|
|
5
|
Heredia V, Marchal L, Gonçalves O, Pruvost J. Optimization of continuous TAG production by Nannochloropsis gaditana in solar-nitrogen-limited culture. Biotechnol Bioeng 2022; 119:1808-1819. [PMID: 35377482 DOI: 10.1002/bit.28097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 03/22/2022] [Accepted: 03/25/2022] [Indexed: 11/08/2022]
Abstract
Nitrogen limitation and changing solar conditions are both known to affect triacylglycerol (TAG) production in microalgae. This work investigates the optimization of TAG production with a continuous nitrogen-limited culture of Nannochloropsis gaditana in simulated day-night cycles. The effect of day-night cycles was firstly investigated in nitrogen-deprived condition (i.e. batch culture), emphasizing a significant change in mechanical resistance of the strain during the night. The concept of Released TAG, which shows how much of the TAG produced is actually recovered in the downstream stages, i.e. after cell disruption, was shown here of interest. For a maximum released TAG, the optimum harvesting time was suggested as being 4 hours into the night period, which minimizes the losses due to a too great cell mechanical resistance. The protocol for continuous nitrogen-limited culture was then optimized, and a continuous nitrogen addition was compared to a pulsed-addition. For the latter, nitrogen was supplied in a single pulse at the beginning of the light periods, while the bulk medium was supplied separately at a slow but constant dilution rate of 0.005 h - 1 . The pulse dose was calculated after the study of nitrogen consumption and TAG production/consumption during the day-night cycles. The estimated released TAG for the pulsed-addition of 1.4 ⋅ 1 0 - 3 kg/m 2 ⋅ d was found significantly higher than the one achieved in batch culture (0.3 ⋅ 1 0 - 3 kg/m 2 ⋅ d) but lower than for continuous nitrogen addition which obtained the highest released TAG of 3 ⋅ 1 0 - 3 kg/m 2 ⋅ d. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Vladimir Heredia
- Université de Nantes, Oniris, GEPEA, UMR 6144 F-44600, Saint-Nazaire, France
| | - Luc Marchal
- Université de Nantes, Oniris, GEPEA, UMR 6144 F-44600, Saint-Nazaire, France
| | - Olivier Gonçalves
- Université de Nantes, Oniris, GEPEA, UMR 6144 F-44600, Saint-Nazaire, France
| | - Jeremy Pruvost
- Université de Nantes, Oniris, GEPEA, UMR 6144 F-44600, Saint-Nazaire, France
| |
Collapse
|
6
|
Todisco E, Louveau J, Thobie C, Dechandol E, Hervé L, Titica M, Pruvost J. A dynamic model for temperature prediction in a façade-integrated photobioreactor. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.03.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
7
|
Bonnanfant M, Marec H, Jesus B, Mouget JL, Pruvost J. Investigation of the photosynthetic response of Chlorella vulgaris to light changes in a torus-shape photobioreactor. Appl Microbiol Biotechnol 2021; 105:8689-8701. [PMID: 34724082 DOI: 10.1007/s00253-021-11636-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 09/14/2021] [Accepted: 10/05/2021] [Indexed: 10/20/2022]
Abstract
An efficient use of light is essential to achieve good performances in microalgae cultivation systems. This can be challenging particularly under solar conditions where light is highly dynamic (e.g., day/night cycles, rapid changes in wind and weather conditions). Microalgae display different mechanisms to optimize light use efficiency. In the short term, when high light is encountered, several processes of photoprotection can be involved to avoid cell damages (e.g., xanthophyll cycle). In the long term, when cells are exposed to a different light intensity, pigment content changes, i.e., photoacclimation. The purpose of this study is to investigate the photosynthetic response of Chlorella vulgaris cultures grown in closed lab-scale, torus-shape photobioreactor under well-controlled light conditions, namely, constant and dynamic light transitions. Experiments were conducted in continuous mode with detailed characterization of the light attenuation conditions for each condition, as represented by the mean rate of photon absorption (MRPA), so as to characterize the time responses of the photosynthetic cells toward light changes. This enables to observe short-term and long-term responses with their own characteristic times. The mechanisms involved were found to be different between increasing and decreasing light transitions. Furthermore the MRPA was found a valuable parameter to relate the effect of light to biological responses (i.e., pigment changes) under constant light and dynamic light conditions.Key points• MRPA proved valuable to relate C. vulgaris responses to light changes.• A linear evolution was found between pigment content and MRPA in continuous light.• A rising PFD step induced fast protection and acclimation mechanisms.
Collapse
Affiliation(s)
- M Bonnanfant
- GEPEA, UMR 6144, Oniris, CNRS, Université de Nantes, 44600, Saint-Nazaire, France.,Mer-Molécules-Santé (MMS), EA 2160, Le Mans Université, Le Mans Cedex 9, France
| | - H Marec
- GEPEA, UMR 6144, Oniris, CNRS, Université de Nantes, 44600, Saint-Nazaire, France
| | - B Jesus
- Mer-Molécules-Santé (MMS), EA2160, Faculté Des Sciences, Université de Nantes, Nantes, France
| | - J-L Mouget
- Mer-Molécules-Santé (MMS), EA 2160, Le Mans Université, Le Mans Cedex 9, France
| | - J Pruvost
- GEPEA, UMR 6144, Oniris, CNRS, Université de Nantes, 44600, Saint-Nazaire, France.
| |
Collapse
|
8
|
Busnel A, Samhat K, Gérard E, Kazbar A, Marec H, Dechandol E, Le Gouic B, Hauser JL, Pruvost J. Development and validation of a screening system for characterizing and modeling biomass production from cyanobacteria and microalgae: Application to Arthrospira platensis and Haematococcus pluvialis. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102386] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
9
|
Heredia V, Pruvost J, Gonçalves O, Drouin D, Marchal L. Lipid recovery from Nannochloropsis gaditana using the wet pathway: Investigation of the operating parameters of bead milling and centrifugal extraction. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102318] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
10
|
Le Gouic B, Marec H, Pruvost J, Cornet J. Investigation of growth limitation by CO2 mass transfer and inorganic carbon source for the microalga Chlorella vulgaris in a dedicated photobioreactor. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116388] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
11
|
Gifuni I, Lavenant L, Pruvost J, Masse A. Recovery of microalgal protein by three-steps membrane filtration: Advancements and feasibility. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
12
|
Hoeniges J, Kandilian R, Zhang C, Pruvost J, Legrand J, Grizeau D, Pilon L. Effect of colony formation on light absorption by Botryococcus braunii. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
13
|
Nghiem Xuan R, Safitri I, Mouget J, Pruvost J, Turpin V, Jaouen P. Design of an artificial culture medium to optimize Haslea ostrearia biomass and marennine production. ALGAL RES 2020. [DOI: 10.1016/j.algal.2019.101653] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
14
|
Bonnanfant M, Jesus B, Pruvost J, Mouget JL, Campbell DA. Photosynthetic electron transport transients in Chlorella vulgaris under fluctuating light. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101713] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
15
|
Kazbar A, Cogne G, Urbain B, Marec H, Le-Gouic B, Tallec J, Takache H, Ismail A, Pruvost J. Effect of dissolved oxygen concentration on microalgal culture in photobioreactors. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101432] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
16
|
Pruvost J, Goetz V, Artu A, Das P, Al Jabri H. Thermal modeling and optimization of microalgal biomass production in the harsh desert conditions of State of Qatar. ALGAL RES 2019. [DOI: 10.1016/j.algal.2018.12.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Pruvost J, Le Borgne F, Artu A, Legrand J. Development of a thin-film solar photobioreactor with high biomass volumetric productivity (AlgoFilm©) based on process intensification principles. ALGAL RES 2017. [DOI: 10.1016/j.algal.2016.10.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
18
|
Taleb A, Kandilian R, Touchard R, Montalescot V, Rinaldi T, Taha S, Takache H, Marchal L, Legrand J, Pruvost J. Screening of freshwater and seawater microalgae strains in fully controlled photobioreactors for biodiesel production. Bioresour Technol 2016; 218:480-90. [PMID: 27394994 DOI: 10.1016/j.biortech.2016.06.086] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/21/2016] [Accepted: 06/22/2016] [Indexed: 05/18/2023]
Abstract
Strain selection is one of the primary hurdles facing cost-effective microalgal biodiesel production. Indeed, the strain used affects both upstream and downstream biodiesel production processes. This study presents a screening procedure that considers the most significant criteria in microalgal biodiesel production including TAG production and wet extraction and recovery of TAGs. Fourteen freshwater and seawater strains were investigated. Large variation was observed between the strains in all the screening criteria. The overall screening procedure ultimately led to the identification of Parachlorella kessleri UTEX2229 and Nannochloropsis gaditana CCMP527 as the best freshwater and seawater strains, respectively. They featured the largest areal TAG productivity equal to 2.7×10(-3) and 2.3×10(-3)kgm(-2)d(-1), respectively. These two strains also displayed encouraging cell fragility in a high pressure bead milling process with 69% and 98% cell disruption at 1750bar making them remarkable strains for TAG extraction in wet environment.
Collapse
Affiliation(s)
- A Taleb
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France; AZM Center for Biotechnology Research and Its Applications, Laboratory of Applied Biotechnology, Lebanese University, EDST, Tripoli, Lebanon; Department of Food Science and Technology, Faculty of Agricultural and Veterinary Medicine, Lebanese University, Dekweneh, Beirut, Lebanon
| | - R Kandilian
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - R Touchard
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - V Montalescot
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - T Rinaldi
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - S Taha
- AZM Center for Biotechnology Research and Its Applications, Laboratory of Applied Biotechnology, Lebanese University, EDST, Tripoli, Lebanon
| | - H Takache
- Department of Food Science and Technology, Faculty of Agricultural and Veterinary Medicine, Lebanese University, Dekweneh, Beirut, Lebanon
| | - L Marchal
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - J Legrand
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - J Pruvost
- GEPEA, Université de Nantes, CNRS UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France.
| |
Collapse
|
19
|
Caporgno MP, Pruvost J, Legrand J, Lepine O, Tazerout M, Bengoa C. Hydrothermal liquefaction of Nannochloropsis oceanica in different solvents. Bioresour Technol 2016; 214:404-410. [PMID: 27155795 DOI: 10.1016/j.biortech.2016.04.123] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/25/2016] [Accepted: 04/27/2016] [Indexed: 06/05/2023]
Abstract
Although the hydrothermal liquefaction is considered a promising technology for converting microalgae into liquid biofuels, there are still some disadvantages. This paper demonstrated that the bio-oil yield can be significantly improved by adding alcohols as co-solvents and carrying out the conversion at mild conditions (<250°C), but at the expense of a reduced bio-oil quality. By adding ethanol, the bio-oil yields obtained (up to ∼60%) were comparable to the yield obtained at severe operating conditions using only water as solvent (54±2% on average), but the quality of the bio-oil was lower. However, the main advantages of the process here described lie in the utilisation of wet microalgae (∼75% moisture) and alcohol concentrations which avoid both drying the microalgae and decreasing the amount of microalgae loaded in the reactor.
Collapse
Affiliation(s)
- M P Caporgno
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain
| | - J Pruvost
- GEPEA, Université de Nantes, CNRS, UMR 6144, bd de l'Université, CRTT - BP 406, 44602 Saint-Nazaire Cedex, France
| | - J Legrand
- GEPEA, Université de Nantes, CNRS, UMR 6144, bd de l'Université, CRTT - BP 406, 44602 Saint-Nazaire Cedex, France
| | - O Lepine
- AlgoSource SAS, 37 bd de l'Université, CRTT - BP 406, 44602 Saint-Nazaire Cedex, France
| | - M Tazerout
- GEPEA, Département Systèmes Energétiques et Environnement, Ecole des Mines de Nantes, UMR 6144, La Chantrerie, 4 rue Alfred Kastler, BP 20722, F-44307 Nantes Cedex 3, France
| | - C Bengoa
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain.
| |
Collapse
|
20
|
Kandilian R, Soulies A, Pruvost J, Rousseau B, Legrand J, Pilon L. Simple method for measuring the spectral absorption cross-section of microalgae. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2016.02.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
21
|
Caporgno MP, Olkiewicz M, Pruvost J, Lepine O, Legrand J, Font J, Bengoa C. A novel pre-treatment for the methane production from microalgae by using N-methylmorpholine-N-oxide (NMMO). Bioresour Technol 2016; 201:370-373. [PMID: 26684667 DOI: 10.1016/j.biortech.2015.11.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 11/20/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
The aim of this work was to study the effect of the solvent N-methylmorpholine-N-oxide (NMMO) to pre-treat Nannochloropsis oculata before the anaerobic digestion process. The results indicated that the pre-treatment affects the characteristics of the cell wall, which consequently becomes more susceptible to the microorganisms attack during anaerobic digestion. The methane production was increased by 43% after the pre-treatment, from 238±6mLCH4/gVS until 339±4mLCH4/gVS. On the contrary, the methane production from Chlorella vulgaris decreased after the pre-treatment from 251±4mLCH4/gVS to 231±3mLCH4/gVS. The failure on the pre-treatment was attributed to the particular characteristics of the substrate in consequence of a previous drying step.
Collapse
Affiliation(s)
- M P Caporgno
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Paisos Catalans 26, 43007 Tarragona, Spain
| | - M Olkiewicz
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Paisos Catalans 26, 43007 Tarragona, Spain
| | - J Pruvost
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | - O Lepine
- AlgoSource SAS, 37 bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | - J Legrand
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | - J Font
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Paisos Catalans 26, 43007 Tarragona, Spain
| | - C Bengoa
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Paisos Catalans 26, 43007 Tarragona, Spain.
| |
Collapse
|
22
|
Pruvost J, Le Borgne F, Artu A, Cornet JF, Legrand J. Industrial Photobioreactors and Scale-Up Concepts. Photobioreaction Engineering 2016. [DOI: 10.1016/bs.ache.2015.11.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
23
|
|
24
|
Caporgno M, Taleb A, Olkiewicz M, Font J, Pruvost J, Legrand J, Bengoa C. Microalgae cultivation in urban wastewater: Nutrient removal and biomass production for biodiesel and methane. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.05.011] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
25
|
Taleb A, Pruvost J, Legrand J, Marec H, Le-Gouic B, Mirabella B, Legeret B, Bouvet S, Peltier G, Li-Beisson Y, Taha S, Takache H. Development and validation of a screening procedure of microalgae for biodiesel production: application to the genus of marine microalgae Nannochloropsis. Bioresour Technol 2015; 177:224-32. [PMID: 25496942 DOI: 10.1016/j.biortech.2014.11.068] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Revised: 11/14/2014] [Accepted: 11/15/2014] [Indexed: 05/21/2023]
Abstract
Nannochloropsis has emerged as a promising alga for biodiesel production. However, the genus consists of 6 species and hundreds of strains making strain selection a challenge. Furthermore, oil productivity is instrumental to economic viability of any algal strain for industrial production, which is dependent on growth rate and oil content. In most cases, these two parameters have been studied independently. Thus, the goal of this study is to provide a combined method for evaluating strain performance in specially designed photobioreactors together with an in-depth lipidomic analyses. The nine strains of Nannochloropsis tested showed considerable variations in productivity and lipidomics highlighting the importance of strain selection. Finally, Nannochloropsis gaditana CCMP527 and Nannochloropsis salina CCMP537 emerged as the two most promising strains, with an oil content of 37 and 27 dry wt% after 11-day nitrogen starvation, respectively, resulting in TAG productivity of 13×10(-3) and 18×10(-3) kg m(-3) d(-1), respectively.
Collapse
Affiliation(s)
- A Taleb
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France; Department of Food Science and Technology, Faculty of Agricultural and Veterinary Medicine, Lebanese University, Dekwaneh, Beirut, Lebanon; AZM Center for Biotechnology Research and its Applications, Laboratory of Applied Biotechnology, Lebanese University, EDST, Tripoli, Lebanon
| | - J Pruvost
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France.
| | - J Legrand
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - H Marec
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - B Le-Gouic
- GEPEA, Université de Nantes, CNRS, UMR6144, bd de l'Université, CRTT, BP 406, 44602 Saint-Nazaire Cedex, France
| | - B Mirabella
- CEA, IBEB, Lab Bioenerget Biotechnol Bacteries & Microalgues, Saint-Paul-lez-Durance, F-13108, France; CNRS, UMR 7265 Biol Veget & Microbiol Environ, Saint-Paul-lez-Durance, F-13108, France; Aix Marseille Université, BVME UMR7265, Marseille, F-13284, France
| | - B Legeret
- CEA, IBEB, Lab Bioenerget Biotechnol Bacteries & Microalgues, Saint-Paul-lez-Durance, F-13108, France; CNRS, UMR 7265 Biol Veget & Microbiol Environ, Saint-Paul-lez-Durance, F-13108, France; Aix Marseille Université, BVME UMR7265, Marseille, F-13284, France
| | - S Bouvet
- CEA, IBEB, Lab Bioenerget Biotechnol Bacteries & Microalgues, Saint-Paul-lez-Durance, F-13108, France; CNRS, UMR 7265 Biol Veget & Microbiol Environ, Saint-Paul-lez-Durance, F-13108, France; Aix Marseille Université, BVME UMR7265, Marseille, F-13284, France
| | - G Peltier
- CEA, IBEB, Lab Bioenerget Biotechnol Bacteries & Microalgues, Saint-Paul-lez-Durance, F-13108, France; CNRS, UMR 7265 Biol Veget & Microbiol Environ, Saint-Paul-lez-Durance, F-13108, France; Aix Marseille Université, BVME UMR7265, Marseille, F-13284, France
| | - Y Li-Beisson
- CEA, IBEB, Lab Bioenerget Biotechnol Bacteries & Microalgues, Saint-Paul-lez-Durance, F-13108, France; CNRS, UMR 7265 Biol Veget & Microbiol Environ, Saint-Paul-lez-Durance, F-13108, France; Aix Marseille Université, BVME UMR7265, Marseille, F-13284, France
| | - S Taha
- Department of Food Science and Technology, Faculty of Agricultural and Veterinary Medicine, Lebanese University, Dekwaneh, Beirut, Lebanon
| | - H Takache
- AZM Center for Biotechnology Research and its Applications, Laboratory of Applied Biotechnology, Lebanese University, EDST, Tripoli, Lebanon
| |
Collapse
|
26
|
Redon C, Coudreuse JM, Pruvost J, Viton JM, Delarque A, Gentile G. Le médecin généraliste face au certificat médical de non contre-indication à la pratique sportive : à propos d’une enquête de pratique. Sci Sports 2013. [DOI: 10.1016/j.scispo.2012.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
27
|
Hadj-Romdhane F, Zheng X, Jaouen P, Pruvost J, Grizeau D, Croué JP, Bourseau P. The culture of Chlorella vulgaris in a recycled supernatant: effects on biomass production and medium quality. Bioresour Technol 2013; 132:285-92. [PMID: 23411460 DOI: 10.1016/j.biortech.2013.01.025] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 01/03/2013] [Accepted: 01/05/2013] [Indexed: 05/21/2023]
Abstract
Reusing supernatant of microalgae culture medium can have inhibitory or toxic effects on the biomass production because of the release of organic metabolites by cells in the culture medium during their growth. This work investigated the impact of Chlorella vulgaris medium recycling on culture productivity, cells quality and accumulation of excreted metabolites in the culture medium. No significant impact on the C. vulgaris growth was observed after 63days of recycling, the productivity remained stable at around 0.55kgm(-3)day(-1). Organic matters accumulated in supernatant were identified as biopolymers (BP) poor in nitrogen and with a size above 40kDa (probably polysaccharides), and small organic molecules (SOM) richer in nitrogen with a molecular size ranging from 1 to 3kDa. The concentration of biopolymers in the supernatant increased till to a maximum and then decreased, possibly consumed by bacteria, whereas small organic compounds accumulated in the medium.
Collapse
Affiliation(s)
- F Hadj-Romdhane
- LUNAM Université, Université de Nantes, CNRS, GEPEA UMR 6144, bd de l'Université, CRTT-BP 406, 44 602 Saint-Nazaire Cedex, France
| | | | | | | | | | | | | |
Collapse
|
28
|
Hadj-Romdhane F, Jaouen P, Pruvost J, Grizeau D, Van Vooren G, Bourseau P. Development and validation of a minimal growth medium for recycling Chlorella vulgaris culture. Bioresour Technol 2012; 123:366-74. [PMID: 22940343 DOI: 10.1016/j.biortech.2012.07.085] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 06/18/2012] [Accepted: 07/23/2012] [Indexed: 05/21/2023]
Abstract
When microalgae culture medium is recycled, ions (e.g. Na(+), K(+), Ca(2+)) that were not assimilated by the microalgae accumulate in the medium. Therefore, a growth medium (HAMGM) was developed that included ions that were more easily assimilated by Chlorella vulgaris, such as ammonium one (NH(4)(+)). Recycling performance was studied by carrying out 8-week continuous cultivation of C. vulgaris with recycled HAMGM medium. No loss of biomass productivity was observed compared to culture in a conventional medium, and accumulation of ions over time was negligible.
Collapse
Affiliation(s)
- F Hadj-Romdhane
- Université de Nantes, CNRS, GEPEA UMR-CNRS 6144, boulevard de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | | | | | | | | | | |
Collapse
|
29
|
Van Vooren G, Le Grand F, Legrand J, Cuiné S, Peltier G, Pruvost J. Investigation of fatty acids accumulation in Nannochloropsis oculata for biodiesel application. Bioresour Technol 2012; 124:421-32. [PMID: 23018107 DOI: 10.1016/j.biortech.2012.08.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/31/2012] [Accepted: 08/02/2012] [Indexed: 05/02/2023]
Abstract
Lipids production of the marine microalga species Nannochloropsis oculata was deeply investigated by studying under continuous light the effects of different nitrogen starvation strategies in photobioreactors of various thicknesses. Operating parameters like incident photons flux density (PFD), initial nitrogen (progressive starvation strategy) or biomass concentrations (sudden starvation strategy) were examined, with a detailed analysis of their effects on the quality and production kinetics of total (TL) and triglycerides (TG). In addition to the already known effect of nitrogen starvation to trigger reserve lipids accumulation (mainly TG), it was demonstrated the relevance of the light received per cell affecting TG content and productivities, as well as fatty acids (FA) profiles. With appropriate optimization, N. oculata was confirmed as an interesting candidate for biodiesel application, with high FA accumulation (up to around 50%DW with 43%DW in TG-FA), high productivity (maximum 3.6×10(-3)kg(TG-FA)m(-2)d(-1)) and a TG-FA profile close to palm oil.
Collapse
Affiliation(s)
- G Van Vooren
- Université de Nantes, CNRS, GEPEA, UMR-CNRS 6144, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | | | | | | | | | | |
Collapse
|
30
|
Pruvost J, Cornet JF, Goetz V, Legrand J. Theoretical investigation of biomass productivities achievable in solar rectangular photobioreactors for the cyanobacterium Arthrospira platensis. Biotechnol Prog 2012; 28:699-714. [DOI: 10.1002/btpr.1540] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 03/06/2012] [Indexed: 11/11/2022]
|
31
|
Edouard P, Morel N, Serra JM, Pruvost J, Oullion R, Depiesse F. Prévention des lésions de l’appareil locomoteur liées à la pratique de l’athlétisme sur piste. Revue des données épidémiologiques. Sci Sports 2011. [DOI: 10.1016/j.scispo.2011.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
32
|
Lotito G, Pruvost J, Collado H, Coudreuse JM, Bensoussan L, Curvale G, Viton JM, Delarque A. Peroneus quartus and functional ankle instability. Ann Phys Rehabil Med 2011; 54:282-92. [PMID: 21697026 DOI: 10.1016/j.rehab.2011.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 05/09/2011] [Accepted: 05/13/2011] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Physical and rehabilitation medicine physicians commonly see patients with chronic functional ankle instability. The main anatomical structures involved in ankle stability are the peroneus (fibularis) brevis and peroneus longus muscles. Several anatomical muscle-tendon variations have been described in the literature as being sometimes responsible for this instability, the peroneus quartus muscle being the most frequent. The objective of this clinical study is to discuss the implication of the bilateral peroneus quartus muscle in functional ankle instability. CLINICAL CASE This 26-year-old patient was seen in PM&R consultation for recurrent episodes of lateral ankle sprains. The clinical examination found a moderate hyperlaxity on the right side in bilateral ankle varus. We also noted a bilateral weakness of the peroneus muscles. Additional imaging examinations showed a supernumerary bilateral peroneus quartus. The electroneuromyogram of the peroneus muscles was normal. DISCUSSION In the literature the incidence of a supernumerary peroneus quartus muscle varies from 0 to 21.7%. Most times this muscle is asymptomatic and is only fortuitously discovered. However some cases of chronic ankle pain or instability have been reported in the literature. It seems relevant to discuss, around the clinical case of this patient, the impact of this muscle on ankle instability especially when faced with lingering weakness of the peroneus brevis and longus muscles in spite of eccentric strength training and in the absence of any neurological impairment. One of the hypotheses, previously described in the literature, would be the overcrowding effect resulting in a true conflict by reducing the available space for the peroneal muscles in the peroneal sheath.
Collapse
Affiliation(s)
- G Lotito
- Pôle intersites de médecine physique et de réadaptation médecine et traumatologie du sport, hôpital La Timone, Marseille, France.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Degrenne B, Pruvost J, Titica M, Takache H, Legrand J. Kinetic modeling of light limitation and sulfur deprivation effects in the induction of hydrogen production with Chlamydomonas reinhardtii. Part II: Definition of model-based protocols and experimental validation. Biotechnol Bioeng 2011; 108:2288-99. [PMID: 21520019 DOI: 10.1002/bit.23180] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Revised: 03/17/2011] [Accepted: 04/08/2011] [Indexed: 11/11/2022]
Abstract
Photosynthetic hydrogen production under light by the green microalga Chlamydomonas reinhardtii was investigated in a torus-shaped PBR in sulfur-deprived conditions. Culture conditions, represented by the dry biomass concentration of the inoculum, sulfate concentration, and incident photon flux density (PFD), were optimized based on a previously published model (Fouchard et al., 2009. Biotechnol Bioeng 102:232-245). This allowed a strictly autotrophic production, whereas the sulfur-deprived protocol is usually applied in photoheterotrophic conditions. Experimental results combined with additional information from kinetic simulations emphasize effects of sulfur deprivation and light attenuation in the PBR in inducing anoxia and hydrogen production. A broad range of PFD was tested (up to 500 µmol photons m(-2) s(-1) ). Maximum hydrogen productivities were 1.0 ± 0.2 mL H₂ /h/L (or 25 ± 5 mL H₂ /m(2) h) and 3.1 mL ± 0.4 H₂ /h L (or 77.5 ± 10 mL H₂ /m(2) h), at 110 and 500 µmol photons m(-2) s(-1) , respectively. These values approached a maximum specific productivity of approximately 1.9 mL ± 0.4 H₂ /h/g of biomass dry weight, clearly indicative of a limitation in cell capacity to produce hydrogen. The efficiency of the process and further optimizations are discussed.
Collapse
Affiliation(s)
- B Degrenne
- Université de Nantes, CNRS, GEPEA UMR-CNRS 6144, Bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France; telephone: +33-2-40-17-26-68; fax: +33-2-40-17-26-18
| | | | | | | | | |
Collapse
|
34
|
|
35
|
Edouard P, Pruvost J, Edouard JL, Morin JB. A pilot study about causes of dropouts in high-level decathlon competitions. Br J Sports Med 2011. [DOI: 10.1136/bjsm.2011.084038.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
36
|
Degrenne B, Pruvost J, Legrand J. Effect of prolonged hypoxia in autotrophic conditions in the hydrogen production by the green microalga Chlamydomonas reinhardtii in photobioreactor. Bioresour Technol 2011; 102:1035-43. [PMID: 20817442 DOI: 10.1016/j.biortech.2010.08.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 07/31/2010] [Accepted: 08/02/2010] [Indexed: 05/10/2023]
Abstract
In the context of hydrogen production by the green alga Chlamydomonas reinhardtii, the control of light attenuation conditions is used to set-up anoxia under illuminated and autotrophic conditions, without affecting photosynthetic capacities of cells (as with sulphur deprivation or PSII inhibitors like DCMU). This paper presents a full description of the protocol where the incident photons flux density (PFD) is adapted during cultivation in order to obtain a sufficiently low illuminated fraction γ under 0.25 leading to anoxic hydrogen producing conditions during several days. The protocol is validated in a torus-shape photobioreactor (PBR) revealing after few days of anoxic conditions a peak of hydrogen production (1.44 ml H2/h/l of culture; [0.8-1.0] ml H2/h/g of dry weight biomass) concomitant with a decrease of biomass concentration, protein content and maximal photosynthetic yield. Effect of over-accumulating starch, as being known to increase hydrogen production by the PSII-independent pathway, is also investigated.
Collapse
Affiliation(s)
- B Degrenne
- Université de Nantes, CNRS, GEPEA UMR-CNRS 6144, Bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | | | | |
Collapse
|
37
|
Pruvost J, Van Vooren G, Le Gouic B, Couzinet-Mossion A, Legrand J. Systematic investigation of biomass and lipid productivity by microalgae in photobioreactors for biodiesel application. Bioresour Technol 2011; 102:150-8. [PMID: 20675127 DOI: 10.1016/j.biortech.2010.06.153] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 06/23/2010] [Accepted: 06/25/2010] [Indexed: 05/04/2023]
Abstract
We describe a methodology to investigate the potential of given microalgae species for biodiesel production by characterizing their productivity in terms of both biomass and lipids. A multi-step approach was used: determination of biological needs for macronutrients (nitrate, phosphate and sulphate), determination of maximum biomass productivity (the "light-limited" regime), scaling-up of biomass production in photobioreactors, including a theoretical framework to predict corresponding productivities, and investigation of how nitrate starvation protocol affects cell biochemical composition and triggers triacylglycerol (TAG) accumulation. The methodology was applied to two freshwater strains, Chlorella vulgaris and Neochloris oleoabundans, and one seawater diatom strain, Cylindrotheca closterium. The highest total lipid content was achieved with N. oleoabundans (25-37% of DW), while the highest TAG content was found in C. vulgaris (11-14% of DW). These two species showed similar TAG productivities.
Collapse
Affiliation(s)
- J Pruvost
- Université de Nantes, CNRS, GEPEA UMR-CNRS 6144, bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France.
| | | | | | | | | |
Collapse
|
38
|
|
39
|
Pruvost J, Van Vooren G, Cogne G, Legrand J. Investigation of biomass and lipids production with Neochloris oleoabundans in photobioreactor. Bioresour Technol 2009; 100:5988-95. [PMID: 19560349 DOI: 10.1016/j.biortech.2009.06.004] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Revised: 05/29/2009] [Accepted: 06/02/2009] [Indexed: 05/09/2023]
Abstract
The fresh water microalga Neochloris oleoabundans was investigated for its ability to accumulate lipids and especially triacylglycerols (TAG). A systematic study was conducted, from the determination of the growth medium to its characterization in an airlift photobioreactor. Without nutrient limitation, a maximal biomass areal productivity of 16.5 g m(-2) day(-1) was found. Effects of nitrogen starvation to induce lipids accumulation was next investigated. Due to initial N. oleoabundans total lipids high content (23% of dry weight), highest productivity was obtained without mineral limitation with a maximal total lipids productivity of 3.8 g m(-2) day(-1). Regarding TAG, an almost similar productivity was found whatever the protocol was: continuous production without mineral limitation (0.5 g m(-2) day(-1)) or batch production with either sudden or progressive nitrogen deprivation (0.7 g m(-2) day(-1)). The decrease in growth rate reduces the benefit of the important lipids and TAG accumulation as obtained in nitrogen starvation (37% and 18% of dry weight, respectively).
Collapse
Affiliation(s)
- J Pruvost
- GEPEA, Université de Nantes, CNRS, UMR6144, Bd de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France.
| | | | | | | |
Collapse
|
40
|
|
41
|
Mojaat M, Pruvost J, Foucault A, Legrand J. Effect of organic carbon sources and Fe2+ ions on growth and β-carotene accumulation by Dunaliella salina. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2007.09.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
42
|
Mojaat M, Foucault A, Pruvost J, Legrand J. Optimal selection of organic solvents for biocompatible extraction of beta-carotene from Dunaliella salina. J Biotechnol 2007; 133:433-41. [PMID: 18155312 DOI: 10.1016/j.jbiotec.2007.11.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 10/20/2007] [Accepted: 11/12/2007] [Indexed: 12/18/2022]
Abstract
In the aim of beta-carotene biocompatible extraction, toxicity of various pure solvents belonging to different homologous series has been investigated for Dunaliella salina. The results showed that solvents having logP(oct) > 5 or having a molecular weight over 150 g/mol can be considered biocompatible for this microalga. The membrane critical solvent concentration for each series of solvents has been calculated applying Osborne's model, showing that the aliphatic chlorinated hydrocarbon is the most toxic family studied. Mixtures of a biocompatible solvent (decane) with a toxic solvent (CH(2)Cl(2), MEK, MTBE) have been studied. The beta-carotene extraction ability of CH(2)Cl(2)-decane mixture was found six times more efficient than with pure decane. It has been demonstrated that the extraction ability of solvent depends on its affinity with the product extracted and on its concentration incorporated in the cellular membrane.
Collapse
Affiliation(s)
- M Mojaat
- Université de Nantes, CNRS, GEPEA UMR-CNRS 6144, Boulevard de l'Université, CRTT-BP 406, 44602 Saint-Nazaire Cedex, France
| | | | | | | |
Collapse
|
43
|
Guagliardo V, Peretti-Watel P, Verger P, Pruvost J, Guibbert L, Mignon P, Obadia Y. [The relationship between the rigorous practice of sports and addictions: results from a survey in south-eastern France]. Sante Publique 2006; 18:353-62. [PMID: 17094678 DOI: 10.3917/spub.063.0353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
This study aimed to assess the prevalence of cigarette, alcohol and cannabis consumption among top-ranked French student athletes aged between 16-24 years old, and to identify correlating factors. Overall, 837 athletes participated in the study (82% response rate). Among females, the amount and duration of sporting activity in which they were engaged on a weekly basis had a negative correlation to cigarette smoking and the occasional use of cannabis. Among males, however, a positive correlation of these factors was observed for cigarette smoking. Other determinants of alcohol, tobacco and cannabis use were the level of athletic competition and whether the athlete practiced a team sport (as opposed to an individual one), with some gender variations. Two major risk factors for young adult athletes were the existence of high psychological distress (for both sexes) and a lack of family support (particularly in the case of males). Further research is needed to investigate the specific motives to use so-called "recreational" drugs among young athletes engaging in high-level competition.
Collapse
Affiliation(s)
- V Guagliardo
- Observatoire Régional de la Santé PACA-INSERM U379, 23, rue Stanislas Torrents, 13006 Marseille, France
| | | | | | | | | | | | | |
Collapse
|
44
|
|
45
|
|
46
|
Pottier L, Pruvost J, Deremetz J, Cornet JF, Legrand J, Dussap CG. A fully predictive model for one-dimensional light attenuation byChlamydomonas reinhardtii in a torus photobioreactor. Biotechnol Bioeng 2005; 91:569-82. [PMID: 16025533 DOI: 10.1002/bit.20475] [Citation(s) in RCA: 166] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The light attenuation in a photobioreactor is determined using a fully predictive model. The optical properties were first calculated, using a data bank of the literature, from only the knowledge of pigments content, shape, and size distributions of cultivated cells which are a function of the physiology of the current species. The radiative properties of the biological turbid medium were then deduced using the exact Lorenz-Mie theory. This method is experimentally validated using a large-size integrating sphere photometer. The radiative properties are then used in a rectangular, one-dimensional two-flux model to predict radiant light attenuation in a photobioreactor, considering a quasi-collimated field of irradiance. Combination of this radiative model with the predictive determination of optical properties is finally validated by in situ measurement of attenuation profiles in a torus photobioreactor cultivating the microalgae Chlamydomonas reinhardtii, after a complete and proper characterization of the incident light flux provided by the experimental set-up.
Collapse
Affiliation(s)
- L Pottier
- GEPEA Laboratory, UMR-CNRS 6144, University of Nantes, Faculté des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 NANTES Cedex 3, France
| | | | | | | | | | | |
Collapse
|
47
|
Pruvost J, Legrand J, Legentilhomme P, Rosant J. Numerical investigation of bend and torus flows—Part II : Flow simulation in torus reactor. Chem Eng Sci 2004. [DOI: 10.1016/j.ces.2004.03.041] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
Pruvost J, Legrand J, Legentilhomme P. Numerical investigation of bend and torus flows, part I : effect of swirl motion on flow structure in U-bend. Chem Eng Sci 2004. [DOI: 10.1016/j.ces.2004.03.040] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
49
|
Pruvost J, Depiesse F. [Medicolegal aspects of doping in sports]. Ann Readapt Med Phys 2004; 47:263-73. [PMID: 15297116 DOI: 10.1016/j.annrmp.2004.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
OBJECTIVES To investigate the medico-legal aspects of national and international procedures for monitoring prescription drug use by competing athletes. METHODS We studied the French law No. 99-223 of March 23, 1999, relating to the protection of the health of athletes? We also studied annual statistics from the Ministry of Sports concerning anti-doping controls, substances detected by the National Doping Control Laboratory and penalties applied since 2000, as well as the World Anti-Doping Code, which came into effect on January 1, 2004, and should be universally applied by 2006. RESULTS Athletes registered with a federation or unregistered athletes taking part in competitions approved by sporting federations can use prescription drugs but must follow strict rules. Athletes under investigation for drug use must declare all drugs or products recently taken. The use of prescription drugs not on the list of the prohibited substances is allowed, but evidence of the use of such drugs is the responsibility of the prescriber. A medical practitioner in France who considers it essential to prescribe prohibited drugs or drugs under certain restrictions must systematically inform the athlete about the regulations by providing various certificates and forms. For international athletes, a form authorizing therapeutic use must be submitted to the validation committee of the applicable international federation. Disciplinary, ordinal and penal sanctions are also described. CONCLUSION Prescription drug use by an athlete is never a light matter and always engages the responsibility of the doctor. Anti-doping controls and sanctions encourage physicians to comply scrupulously with the medico-legal rules set forth by the public health code and the world anti-doping code.
Collapse
Affiliation(s)
- J Pruvost
- Jeunesse et sports PACA, 9, avenue du Général-Leclerc. 1331 Marseille 03, France
| | | |
Collapse
|
50
|
Abstract
This paper discusses experimental research aimed at defining a base drag reduction device based on splitter plates. The unsteady three-dimensional nature of the flow is studied by Schlieren photography, particle image velocimetry, and measurement of the total unsteady lift and drag loads.
Collapse
Affiliation(s)
- L Neau
- Office National d'Etudes et de Recherches Aérospatiales (ONERA), Lille Cedex, France.
| | | | | | | |
Collapse
|