Bioethanol production from four abundant Indian agricultural wastes.
Harinikumar, K. M., Kudahettige-Nilsson, R. L., Devadas, A., Holmgren, M., & Sellstedt, A.
Biofuels, 11(5): 607–613. July 2020.
Paper
doi
link
bibtex
2 downloads
@article{harinikumar_bioethanol_2020,
title = {Bioethanol production from four abundant {Indian} agricultural wastes},
volume = {11},
issn = {1759-7269, 1759-7277},
url = {https://www.tandfonline.com/doi/full/10.1080/17597269.2017.1387744},
doi = {10.1080/17597269.2017.1387744},
language = {en},
number = {5},
urldate = {2021-06-07},
journal = {Biofuels},
author = {Harinikumar, K. M. and Kudahettige-Nilsson, R. L. and Devadas, A. and Holmgren, M. and Sellstedt, A.},
month = jul,
year = {2020},
pages = {607--613},
}
Candidatus Frankia nodulisporulans sp. nov., an Alnus glutinosa-infective Frankia species unable to grow in pure culture and able to sporulate in-planta.
Herrera-Belaroussi, A., Normand, P., Pawlowski, K., Fernandez, M. P., Wibberg, D., Kalinowski, J., Brachmann, A., Berckx, F., Lee, N., Blom, J., Pozzi, A. C., Fournier, P., Bethencourt, L., Dubost, A., Abrouk, D., & Sellstedt, A.
Systematic and Applied Microbiology, 43(6): 126134. November 2020.
Paper
doi
link
bibtex
@article{herrera-belaroussi_candidatus_2020,
title = {Candidatus {Frankia} nodulisporulans sp. nov., an {Alnus} glutinosa-infective {Frankia} species unable to grow in pure culture and able to sporulate in-planta},
volume = {43},
issn = {07232020},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0723202020300898},
doi = {10/gjdt2w},
language = {en},
number = {6},
urldate = {2021-06-07},
journal = {Systematic and Applied Microbiology},
author = {Herrera-Belaroussi, Aude and Normand, Philippe and Pawlowski, Katharina and Fernandez, Maria P. and Wibberg, Daniel and Kalinowski, Jörn and Brachmann, Andreas and Berckx, Fede and Lee, Natuschka and Blom, Jochen and Pozzi, Adrien C. and Fournier, Pascale and Bethencourt, Lorine and Dubost, Audrey and Abrouk, Danis and Sellstedt, Anita},
month = nov,
year = {2020},
pages = {126134},
}
Effects of light intensity on growth and lipid production in microalgae grown in wastewater.
Nzayisenga, J. C., Farge, X., Groll, S. L., & Sellstedt, A.
Biotechnology for Biofuels, 13(1): 4. December 2020.
Paper
doi
link
bibtex
abstract
@article{nzayisenga_effects_2020,
title = {Effects of light intensity on growth and lipid production in microalgae grown in wastewater},
volume = {13},
issn = {1754-6834},
url = {https://biotechnologyforbiofuels.biomedcentral.com/articles/10.1186/s13068-019-1646-x},
doi = {10.1186/s13068-019-1646-x},
abstract = {Abstract
Background
Cultivation of microalgae in wastewater could significantly contribute to wastewater treatment, biodiesel production, and thus the transition to renewable energy. However, more information on effects of environmental factors, including light intensity, on their growth and composition (particularly fatty acid contents) is required. Therefore, we investigated the biomass and fatty acid production of four microalgal species, isolated in the Northern hemisphere and grown at three light intensities (50, 150 and 300 μE m
−2
s
−1
).
Results
Increases in light intensities resulted in higher biomass of all four species and, importantly, raised fatty acid contents of both
Desmodesmus
sp. and
Scenedesmus obliquus
. Fourier-transform IR spectrometry analysis showed that the increases in fatty acid content were associated with reductions in protein, but not carbohydrate, contents. Assessment of fatty acid composition revealed that increasing light intensity led to higher and lower contents of oleic (18:1) and linolenic (18:3) acids, respectively. The microalgae consumed more than 75\% of the nitrogen and phosphorus present in the wastewater used as growth medium.
Conclusion
The results show the importance of optimizing light intensities to improve fatty acid production by microalgae and their quality as sources of biodiesel. In addition, increase in fatty acid content is associated with decrease in protein content.},
language = {en},
number = {1},
urldate = {2021-06-07},
journal = {Biotechnology for Biofuels},
author = {Nzayisenga, Jean Claude and Farge, Xavier and Groll, Sophia Leticia and Sellstedt, Anita},
month = dec,
year = {2020},
pages = {4},
}
Abstract Background Cultivation of microalgae in wastewater could significantly contribute to wastewater treatment, biodiesel production, and thus the transition to renewable energy. However, more information on effects of environmental factors, including light intensity, on their growth and composition (particularly fatty acid contents) is required. Therefore, we investigated the biomass and fatty acid production of four microalgal species, isolated in the Northern hemisphere and grown at three light intensities (50, 150 and 300 μE m −2 s −1 ). Results Increases in light intensities resulted in higher biomass of all four species and, importantly, raised fatty acid contents of both Desmodesmus sp. and Scenedesmus obliquus . Fourier-transform IR spectrometry analysis showed that the increases in fatty acid content were associated with reductions in protein, but not carbohydrate, contents. Assessment of fatty acid composition revealed that increasing light intensity led to higher and lower contents of oleic (18:1) and linolenic (18:3) acids, respectively. The microalgae consumed more than 75% of the nitrogen and phosphorus present in the wastewater used as growth medium. Conclusion The results show the importance of optimizing light intensities to improve fatty acid production by microalgae and their quality as sources of biodiesel. In addition, increase in fatty acid content is associated with decrease in protein content.
More than protection: the function of TiO $_{\textrm{2}}$ interlayers in hematite functionalized Si photoanodes.
Kawde, A., Annamalai, A., Sellstedt, A., Uhlig, J., Wågberg, T., Glatzel, P., & Messinger, J.
Physical Chemistry Chemical Physics, 22(48): 28459–28467. 2020.
Paper
doi
link
bibtex
abstract
@article{kawde_more_2020,
title = {More than protection: the function of {TiO} $_{\textrm{2}}$ interlayers in hematite functionalized {Si} photoanodes},
volume = {22},
issn = {1463-9076, 1463-9084},
shorttitle = {More than protection},
url = {http://xlink.rsc.org/?DOI=D0CP04280C},
doi = {10/gjdpf7},
abstract = {Signature of performance-enhancing oxygen vacancies in the mesoporous TiO
2
interlayer of a hematite functionalized Si microwire photoanode revealed by hard energy X-ray spectroscopy.
,
Worldwide significant efforts are ongoing to develop devices that store solar energy as fuels. In one such approach, solar energy is absorbed by semiconductors and utilized directly by catalysts at their surfaces to split water into H
2
and O
2
. To protect the semiconductors in these photo-electrochemical cells (PEC) from corrosion, frequently thin TiO
2
interlayers are applied. Employing a well-performing photoanode comprised of 1-D n-Si microwires (MWs) covered with a mesoporous (mp) TiO
2
interlayer fabricated by solution processing and functionalized with α-Fe
2
O
3
nanorods, we studied here the function of this TiO
2
interlayer by high-energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) spectroscopy, along with X-ray emission spectroscopy (XES) and standard characterization techniques. Our data reveal that the TiO
2
interlayer not only protects the n-Si MW surface from corrosion, but that it also acts as a template for the hydrothermal growth of α-Fe
2
O
3
nanorods and improves the photocatalytic efficiency. We show that the latter effect correlates with the presence of stable oxygen vacancies at the interface between mp-TiO
2
and α-Fe
2
O
3
, which act as electron traps and thereby substantially reduce the charge recombination rate at the hematite surface.},
language = {en},
number = {48},
urldate = {2021-06-07},
journal = {Physical Chemistry Chemical Physics},
author = {Kawde, Anurag and Annamalai, Alagappan and Sellstedt, Anita and Uhlig, Jens and Wågberg, Thomas and Glatzel, Pieter and Messinger, Johannes},
year = {2020},
pages = {28459--28467},
}
Signature of performance-enhancing oxygen vacancies in the mesoporous TiO 2 interlayer of a hematite functionalized Si microwire photoanode revealed by hard energy X-ray spectroscopy. , Worldwide significant efforts are ongoing to develop devices that store solar energy as fuels. In one such approach, solar energy is absorbed by semiconductors and utilized directly by catalysts at their surfaces to split water into H 2 and O 2 . To protect the semiconductors in these photo-electrochemical cells (PEC) from corrosion, frequently thin TiO 2 interlayers are applied. Employing a well-performing photoanode comprised of 1-D n-Si microwires (MWs) covered with a mesoporous (mp) TiO 2 interlayer fabricated by solution processing and functionalized with α-Fe 2 O 3 nanorods, we studied here the function of this TiO 2 interlayer by high-energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) spectroscopy, along with X-ray emission spectroscopy (XES) and standard characterization techniques. Our data reveal that the TiO 2 interlayer not only protects the n-Si MW surface from corrosion, but that it also acts as a template for the hydrothermal growth of α-Fe 2 O 3 nanorods and improves the photocatalytic efficiency. We show that the latter effect correlates with the presence of stable oxygen vacancies at the interface between mp-TiO 2 and α-Fe 2 O 3 , which act as electron traps and thereby substantially reduce the charge recombination rate at the hematite surface.
More than protection: the function of TiO2 interlayers in hematite functionalized Si photoanodes.
Kawde, A., Annamalai, A., Sellstedt, A., Uhlig, J., Wågberg, T., Glatzel, P., & Messinger, J.
Physical Chemistry Chemical Physics, 22(48): 28459–28467. December 2020.
Publisher: The Royal Society of Chemistry
Paper
doi
link
bibtex
abstract
@article{kawde_more_2020,
title = {More than protection: the function of {TiO2} interlayers in hematite functionalized {Si} photoanodes},
volume = {22},
issn = {1463-9084},
shorttitle = {More than protection},
url = {https://pubs.rsc.org/en/content/articlelanding/2020/cp/d0cp04280c},
doi = {10.1039/D0CP04280C},
abstract = {Worldwide significant efforts are ongoing to develop devices that store solar energy as fuels. In one such approach, solar energy is absorbed by semiconductors and utilized directly by catalysts at their surfaces to split water into H2 and O2. To protect the semiconductors in these photo-electrochemical cells (PEC) from corrosion, frequently thin TiO2 interlayers are applied. Employing a well-performing photoanode comprised of 1-D n-Si microwires (MWs) covered with a mesoporous (mp) TiO2 interlayer fabricated by solution processing and functionalized with α-Fe2O3 nanorods, we studied here the function of this TiO2 interlayer by high-energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) spectroscopy, along with X-ray emission spectroscopy (XES) and standard characterization techniques. Our data reveal that the TiO2 interlayer not only protects the n-Si MW surface from corrosion, but that it also acts as a template for the hydrothermal growth of α-Fe2O3 nanorods and improves the photocatalytic efficiency. We show that the latter effect correlates with the presence of stable oxygen vacancies at the interface between mp-TiO2 and α-Fe2O3, which act as electron traps and thereby substantially reduce the charge recombination rate at the hematite surface.},
language = {en},
number = {48},
urldate = {2024-10-16},
journal = {Physical Chemistry Chemical Physics},
author = {Kawde, Anurag and Annamalai, Alagappan and Sellstedt, Anita and Uhlig, Jens and Wågberg, Thomas and Glatzel, Pieter and Messinger, Johannes},
month = dec,
year = {2020},
note = {Publisher: The Royal Society of Chemistry},
pages = {28459--28467},
}
Worldwide significant efforts are ongoing to develop devices that store solar energy as fuels. In one such approach, solar energy is absorbed by semiconductors and utilized directly by catalysts at their surfaces to split water into H2 and O2. To protect the semiconductors in these photo-electrochemical cells (PEC) from corrosion, frequently thin TiO2 interlayers are applied. Employing a well-performing photoanode comprised of 1-D n-Si microwires (MWs) covered with a mesoporous (mp) TiO2 interlayer fabricated by solution processing and functionalized with α-Fe2O3 nanorods, we studied here the function of this TiO2 interlayer by high-energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) spectroscopy, along with X-ray emission spectroscopy (XES) and standard characterization techniques. Our data reveal that the TiO2 interlayer not only protects the n-Si MW surface from corrosion, but that it also acts as a template for the hydrothermal growth of α-Fe2O3 nanorods and improves the photocatalytic efficiency. We show that the latter effect correlates with the presence of stable oxygen vacancies at the interface between mp-TiO2 and α-Fe2O3, which act as electron traps and thereby substantially reduce the charge recombination rate at the hematite surface.
Screening Suitability of Northern Hemisphere Algal Strains for Heterotrophic Cultivation and Fatty Acid Methyl Ester Production.
Nzayisenga, J. C., Niemi, C., Ferro, L., Gorzsas, A., Gentili, F. G., Funk, C., & Sellstedt, A.
Molecules, 25(9): 2107. April 2020.
Paper
doi
link
bibtex
abstract
@article{nzayisenga_screening_2020,
title = {Screening {Suitability} of {Northern} {Hemisphere} {Algal} {Strains} for {Heterotrophic} {Cultivation} and {Fatty} {Acid} {Methyl} {Ester} {Production}},
volume = {25},
issn = {1420-3049},
url = {https://www.mdpi.com/1420-3049/25/9/2107},
doi = {10.3390/molecules25092107},
abstract = {Rapid rises in atmospheric CO2 levels derived from fossil fuel combustion are imposing urgent needs for renewable substitutes. One environmentally friendly alternative is biodiesel produced from suitable microalgal fatty acids. Algal strains normally grow photoautotrophically, but this is problematic in Northern areas because of the light limitations for much of the year. Mixotrophic and particularly heterotrophic strains could be valuable, especially if they can be cultivated in municipal wastewater with contents of nutrients such as nitrogen and phosphorous that should be reduced before release into receiving water. Thus, the aim of this study was to screen for microalgal strains suitable for heterotrophic cultivation with a cheap carbon source (glycerol) for biodiesel production in Nordic, and other high-latitude, countries. One of the examined strains, a Desmodesmus sp. strain designated 2-6, accumulated biomass at similar rates in heterotrophic conditions with 40 mM glycerol as in autotrophic conditions. Furthermore, in heterotrophic conditions it produced more fatty acids, and ca. 50\% more C18:1 fatty acids, as well as showing a significant decrease in C18:3 fatty acids, all of which are highly desirable features for biodiesel production.},
language = {en},
number = {9},
urldate = {2021-06-07},
journal = {Molecules},
author = {Nzayisenga, Jean Claude and Niemi, Calle and Ferro, Lorenza and Gorzsas, Andras and Gentili, Francesco G. and Funk, Christiane and Sellstedt, Anita},
month = apr,
year = {2020},
pages = {2107},
}
Rapid rises in atmospheric CO2 levels derived from fossil fuel combustion are imposing urgent needs for renewable substitutes. One environmentally friendly alternative is biodiesel produced from suitable microalgal fatty acids. Algal strains normally grow photoautotrophically, but this is problematic in Northern areas because of the light limitations for much of the year. Mixotrophic and particularly heterotrophic strains could be valuable, especially if they can be cultivated in municipal wastewater with contents of nutrients such as nitrogen and phosphorous that should be reduced before release into receiving water. Thus, the aim of this study was to screen for microalgal strains suitable for heterotrophic cultivation with a cheap carbon source (glycerol) for biodiesel production in Nordic, and other high-latitude, countries. One of the examined strains, a Desmodesmus sp. strain designated 2-6, accumulated biomass at similar rates in heterotrophic conditions with 40 mM glycerol as in autotrophic conditions. Furthermore, in heterotrophic conditions it produced more fatty acids, and ca. 50% more C18:1 fatty acids, as well as showing a significant decrease in C18:3 fatty acids, all of which are highly desirable features for biodiesel production.