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The effect on growth of Chlamydomonas reinhardtii of flue gas from a power plant based on waste combustion.

Mortensen LM, Gislerød HR - AMB Express (2014)

Bottom Line: Undiluted flue gas reduced the dry weight production by around 20-25% when grown at a photon flux density (PFD) of 300 μmol m(-2) s(-1) artificial light and at 24 or 33°C, compared with the other treatments.A less negative effect was found at the highest flue gas concentration when the algae were grown at 75 μmol m(-2) s(-1) PFD.It was concluded that the negative effect of the undiluted flue gas was attributable to the high CO2 concentration and not to the other pollutants.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Plant Science, The University of Life Sciences, Ås NO-1432, Norway.

ABSTRACT
Flue gases from a power plant based on waste combustion were tested as a carbon dioxide (CO2) source for growing Chlamydomonas reinhardtii. To achieve recognition as an environmentally friendly hydrogen production method, waste gases should be used to grow this hydrogen-producing microalgae. The algae were grown in undiluted flue gas containing 11.4±0.2% CO2 by volume, in diluted flue gas containing 6.7±0.1% or 2.5±0.0% CO2, and in pure liquid CO2 at a concentration of 2.7±0.2%. The NOx concentration was 45±16 mg m(-3), the SO2 concentration was 36±19 mg m(-3), the HCl concentration 4.1±1.0 mg m(-3) and the O2 concentration 7.9±0.2% in the undiluted flue gas. Undiluted flue gas reduced the dry weight production by around 20-25% when grown at a photon flux density (PFD) of 300 μmol m(-2) s(-1) artificial light and at 24 or 33°C, compared with the other treatments. A less negative effect was found at the highest flue gas concentration when the algae were grown at 75 μmol m(-2) s(-1) PFD. Growing the algae outdoors at a day length of 12.5 h and a temperature of around 24°C, the dry weight production was higher (about 15%) in the 2.6% CO2 flue gas treatment compared with all other treatments. Reducing the light level by 30% through shading did not affect the dry weight production. Calculated on aerial basis the productivity reached approximately 70 g m(-2) day(-1) in the 300 μmol m(-2) s(-1) PFD treatment (corresponding to 25 mol m(-2) day(-1)) and approximately 17 g m(-2) day(-1) in the 75μmol m(-2) s(-1) PFD treatment (corresponding to 6.5 mol m(-2) day(-1)). The outdoor production reached around 14 g m(-2) day(-1). It was concluded that the negative effect of the undiluted flue gas was attributable to the high CO2 concentration and not to the other pollutants.

No MeSH data available.


Related in: MedlinePlus

The concentration of CO2dissolved in the culture and pH of the growth medium as influenced by the CO2concentration in the air bubbled through the bottles (means, ±SE).
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Figure 2: The concentration of CO2dissolved in the culture and pH of the growth medium as influenced by the CO2concentration in the air bubbled through the bottles (means, ±SE).

Mentions: For algal growth, the concentration of dissolved CO2 in the nutrient medium is important and not the concentration of CO2 in the air bubbled into the culture, although a close relationship should be expected. In order to document this relationship a test with different concentrations of pure CO2 mixed with air were bubbled through the bottles filled with nutrient medium. The concentration of dissolved CO2 was measured using hand-held titration cells for titrimetric analysis (CHEMetrics Inc., USA, www.chemetric.com). The results showed that a progressive increase in the dissolved CO2 concentration from about 100 to about 500 mg l-1 with increasing CO2 concentration from about 1% up to about 20% (Figure 2). Parallel to this increase the pH decreased from 7.6 to about 6.5. The measurements were done at 23°C. Dissolved CO2 as measured at 7.0% CO2 in the air was 311±12, 297±12 and 297±12 mg l-1 (n=3, ±SE) at 23, 28 and 33°C, respectively.


The effect on growth of Chlamydomonas reinhardtii of flue gas from a power plant based on waste combustion.

Mortensen LM, Gislerød HR - AMB Express (2014)

The concentration of CO2dissolved in the culture and pH of the growth medium as influenced by the CO2concentration in the air bubbled through the bottles (means, ±SE).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4230831&req=5

Figure 2: The concentration of CO2dissolved in the culture and pH of the growth medium as influenced by the CO2concentration in the air bubbled through the bottles (means, ±SE).
Mentions: For algal growth, the concentration of dissolved CO2 in the nutrient medium is important and not the concentration of CO2 in the air bubbled into the culture, although a close relationship should be expected. In order to document this relationship a test with different concentrations of pure CO2 mixed with air were bubbled through the bottles filled with nutrient medium. The concentration of dissolved CO2 was measured using hand-held titration cells for titrimetric analysis (CHEMetrics Inc., USA, www.chemetric.com). The results showed that a progressive increase in the dissolved CO2 concentration from about 100 to about 500 mg l-1 with increasing CO2 concentration from about 1% up to about 20% (Figure 2). Parallel to this increase the pH decreased from 7.6 to about 6.5. The measurements were done at 23°C. Dissolved CO2 as measured at 7.0% CO2 in the air was 311±12, 297±12 and 297±12 mg l-1 (n=3, ±SE) at 23, 28 and 33°C, respectively.

Bottom Line: Undiluted flue gas reduced the dry weight production by around 20-25% when grown at a photon flux density (PFD) of 300 μmol m(-2) s(-1) artificial light and at 24 or 33°C, compared with the other treatments.A less negative effect was found at the highest flue gas concentration when the algae were grown at 75 μmol m(-2) s(-1) PFD.It was concluded that the negative effect of the undiluted flue gas was attributable to the high CO2 concentration and not to the other pollutants.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Plant Science, The University of Life Sciences, Ås NO-1432, Norway.

ABSTRACT
Flue gases from a power plant based on waste combustion were tested as a carbon dioxide (CO2) source for growing Chlamydomonas reinhardtii. To achieve recognition as an environmentally friendly hydrogen production method, waste gases should be used to grow this hydrogen-producing microalgae. The algae were grown in undiluted flue gas containing 11.4±0.2% CO2 by volume, in diluted flue gas containing 6.7±0.1% or 2.5±0.0% CO2, and in pure liquid CO2 at a concentration of 2.7±0.2%. The NOx concentration was 45±16 mg m(-3), the SO2 concentration was 36±19 mg m(-3), the HCl concentration 4.1±1.0 mg m(-3) and the O2 concentration 7.9±0.2% in the undiluted flue gas. Undiluted flue gas reduced the dry weight production by around 20-25% when grown at a photon flux density (PFD) of 300 μmol m(-2) s(-1) artificial light and at 24 or 33°C, compared with the other treatments. A less negative effect was found at the highest flue gas concentration when the algae were grown at 75 μmol m(-2) s(-1) PFD. Growing the algae outdoors at a day length of 12.5 h and a temperature of around 24°C, the dry weight production was higher (about 15%) in the 2.6% CO2 flue gas treatment compared with all other treatments. Reducing the light level by 30% through shading did not affect the dry weight production. Calculated on aerial basis the productivity reached approximately 70 g m(-2) day(-1) in the 300 μmol m(-2) s(-1) PFD treatment (corresponding to 25 mol m(-2) day(-1)) and approximately 17 g m(-2) day(-1) in the 75μmol m(-2) s(-1) PFD treatment (corresponding to 6.5 mol m(-2) day(-1)). The outdoor production reached around 14 g m(-2) day(-1). It was concluded that the negative effect of the undiluted flue gas was attributable to the high CO2 concentration and not to the other pollutants.

No MeSH data available.


Related in: MedlinePlus