Isolation and characterization of microalgal strains for biomass production and wastewater reclamation in Northern Sweden

Ferro, Lorenza; Gentili, Francesco G.; Funk, Christiane

doi:10.1016/j.algal.2018.03.006

Cited by 76 publications

(63 citation statements)

References 54 publications

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“…The four algal strains used in this study (Chlorella vulgaris, Desmodesmus sp., Ettlia pseudoalveolaris, and Scenedesmus obliquus) were isolated in Sweden and described by Ferro et al [34]. Each strain was inoculated and grown in 100 ml of BG11 medium, with a photoperiod of 16 h light (120 μE m −2 s −1 ):8 h dark, at 25 °C, and shaking at 150 rpm.…”

Section: Algal Strains and Municipal Wastewatermentioning

confidence: 99%

Effects of light intensity on growth and lipid production in microalgae grown in wastewater

Nzayisenga

Farge

Groll

et al. 2020

Biotechnol Biofuels

227

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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.

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Section: Algal Strains and Municipal Wastewatermentioning

confidence: 99%

Effects of light intensity on growth and lipid production in microalgae grown in wastewater

Nzayisenga

Farge

Groll

et al. 2020

Biotechnol Biofuels

227

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“…Microalgae isolated from fresh water sources (rivers, lakes, sewage treatment plants) have mostly been investigated for wastewater treatment, but also for biomass accumulation and lipid production. Locally isolated microalgae and even microalgae‐bacteria consortia have been used with success at laboratory scale for removal of nitrate and phosphorus from wastewater and for production of biomass and lipids (Table , Lynch et al , Jämsä et al , Ferro et al , b). The ‘indigenous’ species with best performance in wastewater belong to green algae, whereof Scenedesmus , Desmodesmus and Chlorella are among the most successful species.…”

Section: Exploring and Exploiting The Natural Diversity Of Microalgaementioning

confidence: 99%

Microalgae biotechnology in Nordic countries – the potential of local strains

Cheregi

Ekendahl

Engelbrektsson

et al. 2019

Physiologia Plantarum

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Climate change, energy use and food security are the main challenges that our society is facing nowadays. Biofuels and feedstock from microalgae can be part of the solution if high and continuous production is to be ensured. This could be attained in year‐round, low cost, outdoor cultivation systems using strains that are not only champion producers of desired compounds but also have robust growth in a dynamic climate. Using microalgae strains adapted to the local conditions may be advantageous particularly in Nordic countries. Here, we review the current status of laboratory and outdoor‐scale cultivation in Nordic conditions of local strains for biofuel, high‐value compounds and water remediation. Strains suitable for biotechnological purposes were identified from the large and diverse pool represented by saline (NE Atlantic Ocean), brackish (Baltic Sea) and fresh water (lakes and rivers) sources. Energy‐efficient annual rotation for cultivation of strains well adapted to Nordic climate has the potential to provide high biomass yields for biotechnological purposes.

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“…Strains SP, FNY-2 and 3-4 also produced more biomass under autotrophic conditions than heterotrophically with 40 mM glycerol. However, strains LNY and 2-6, respectively, produced 33% and 3% more biomass heterotrophically with 40 mM glycerol than autotrophically, but the latter was not statistically significant ( Figure 2) [7,11]. In the study in which these strains were initially isolated [7], their growth was found to continue up to approximately 8 days, with no pronounced stationary phase.…”

Section: Comparison Of Heterotrophic and Autotrophic Algal Growthmentioning

confidence: 93%

“…However, strains LNY and 2-6, respectively, produced 33% and 3% more biomass heterotrophically with 40 mM glycerol than autotrophically, but the latter was not statistically significant ( Figure 2) [7,11]. In the study in which these strains were initially isolated [7], their growth was found to continue up to approximately 8 days, with no pronounced stationary phase. Moreover, a Chlorella strain can reportedly produce more biomass under heterotrophic than autotrophic conditions, indicating that this trait may be a common physiological characteristic of algae [11].…”

Section: Comparison Of Heterotrophic and Autotrophic Algal Growthmentioning

confidence: 93%

“…However, their fatty acid profile is also an important consideration, as the relative amounts of saturated and unsaturated fatty acids are important determinants of the quality of the biodiesel produced [6]. Thus, the aim of this study was to assist efforts to exploit the metabolic diversity of microalgae for biodiesel production by screeningcapability of locally isolated Nordic strains [7] for heterotrophic growth and lipid production. In addition, examination of the fatty acid profiles of the most promising strains was conducted.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Screening Suitability of Northern Hemisphere Algal Strains for Heterotrophic Cultivation and Fatty Acid Methyl Ester Production

Nzayisenga

Niemi²,

Ferro

et al. 2020

Molecules

Self Cite

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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.

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Isolation and characterization of microalgal strains for biomass production and wastewater reclamation in Northern Sweden

Cited by 76 publications

References 54 publications

Effects of light intensity on growth and lipid production in microalgae grown in wastewater

Effects of light intensity on growth and lipid production in microalgae grown in wastewater

Microalgae biotechnology in Nordic countries – the potential of local strains

Screening Suitability of Northern Hemisphere Algal Strains for Heterotrophic Cultivation and Fatty Acid Methyl Ester Production

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