Subarctic microalgal strains treat wastewater and produce biomass at low temperature and short photoperiod

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

doi:10.1016/j.algal.2018.08.031

Cited by 52 publications

(32 citation statements)

References 35 publications

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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%

“…These eight local strains were also found highly efficient at removing lipophilic pharmaceuticals from growth medium, and some of them were even able to metabolize these compounds (Gojkovic et al ). Three local strains from Northern Sweden performed better than a collection strain (isolated from South Sweden) when grown in wastewater at different stress conditions (Ferro et al ), in a laboratory scale experiment. The combination of 5°C and continuous light produced the same amounts of biomass as those obtained in standard conditions (25°C, continuous light) and most interesting, allowed complete nitrogen and phosphate removal from wastewater.…”

Section: Exploring and Exploiting The Natural Diversity Of Microalgaementioning

confidence: 99%

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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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Section: Exploring and Exploiting The Natural Diversity Of Microalgaementioning

confidence: 99%

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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“…Some scientists have considered the feasibility of using strains of microalgae for wastewater treatment in the northern regions [10]. However, up to now, rare studies have been conducted to remove nitrogen compounds from wastewater of mining enterprises using frost-resistant strains of microalgae, so research in this area is essential and significant.…”

Section: Introductionmentioning

confidence: 99%

Wastewater treatment of mining enterprises from nitrogen compounds in the Arctic

Korotaeva

2020

SHS Web Conf.

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Open pit mining using explosives based on ammonium nitrate leads to wastewater pollution with nitrogen compounds. In case of insufficient wastewater treatment, pollutants enter surface-water bodies. Excessive concentration of nitrogen compounds in water leads to the development of the process of eutrophication, which adversely affects the vital activity of aquatic organisms and humans. At the moment, a common method of wastewater treatment from nitrogen compounds is a biological treatment method using devices such as aeration chambers, oxidation tanks and slim filters. An alternative option for biological treatment is the introduction of algae into wastewater. In the conditions of the Arctic, it is difficult to carry out biological treatment using algae due to low temperatures throughout the year. In this study, the feasibility of using the frost-resistant strain Chlorella kessleri VKPM A1-l1ARW for the effluents treatment from nitrogen compounds was tested. Model solutions with a known nitrates concentration were used. Experiments were carried out at two specified temperatures for comparison. The results showed that by the end of the 10-day experiment, the nitrates extraction efficiency at standard temperature (20 °C) was from 40.3% to 71.8%, at low temperature (3 °C) was from 30.4% to 73.6%.

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“…Light is a key parameter in microalgae cultivation [19,20,21,22,23,24]. In fact, light intensity, light frequency and photoperiods have been reported to influence microalgae productivity and nutrient removal efficiency [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, the use of appropriate light-dark (L:D) photoperiods has been reported to reduce the light energy demand with similar or even higher productivity [32,33]. Nevertheless, longer than optimum dark periods could result in lower mass productivity [20].…”

Section: Introductionmentioning

confidence: 99%

Effect of light intensity, light duration and photoperiods in the performance of an outdoor photobioreactor for urban wastewater treatment

et al. 2019

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A series of eight experiments were carried out to analyse the effects of light intensity, light duration and photoperiods on a microalgae culture for treating AnMBR effluent at an outdoor photobioreactor (PBR) plant.Improved performance was achieved in terms of nutrient recovery rates, biomass productivity and effluent nutrient concentrations at a higher net photon flux. However, the higher irradiance was also responsible for lower biomass productivity:light irradiance ratios.None of the experiments with different lighting regimes and the same net photon flux showed any significant differences. The data obtained suggest that microalgae performance in this system did not depend on the time of day when light was applied or the length of the photoperiods, but on the net photon flux. No photoinhibiton was * Constant energy consumption of 0.8 KwhSolar light is the most economical option for outdoor microalgae cultivation [24,39], but variations in the weather, day:night cycles and seasonal changes affect light intensity

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Subarctic microalgal strains treat wastewater and produce biomass at low temperature and short photoperiod

Cited by 52 publications

References 35 publications

Microalgae biotechnology in Nordic countries – the potential of local strains

Microalgae biotechnology in Nordic countries – the potential of local strains

Wastewater treatment of mining enterprises from nitrogen compounds in the Arctic

Effect of light intensity, light duration and photoperiods in the performance of an outdoor photobioreactor for urban wastewater treatment

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