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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 photon flux density (PFD) of daylight during the experimental period.
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Figure 3: The photon flux density (PFD) of daylight during the experimental period.

Mentions: In this experiment the microalgae were grown outdoors during four days under the different CO2 treatments in full daylight and in 70% daylight by shading with white plastic (Figure 3). The bottles were closely placed adjacent to each other in water baths in rows with six bottles facing to the south. In the forefront row the culture received full daylight while the shade was given on the back row placed about 30 cm behind. Two water baths were needed for the 24 bottles including four CO2 and two light treatments. The temperature was as a mean 24°C, varying from a peak of around 30°C at midday down to around 22°C during the night. The experiment was carried out in mid-September and the day length was 12.5 h (06.50 – 19.30 h). The building of the power station was located a few meters north of the experiment. The PFD varied from 0 to a maximum of about 1600 μmol m-2 s-1 in full daylight and up to about 1100 μmol m-2 s-1 in shaded conditions (Figure 2). The mean PAR was 17.1 and 12.0 mol m-2 day-1 in full daylight and in shaded conditions, respectively. At the Meterological station 5 km from the experimental site (Østad, Sarpsborg, 59°N, 11°E) the corresponding daylight was measured to 19.7 mol m-2 day-1 when converted from global radiation to PAR (www.bioforsk.no, Agricultural Meteorological service). The higher measured value here was probably due to the light sensor with 180° view (Kipp & Zonen, CM11 pyranometer) and more diffuse light from the north since the building shaded for the light from this direction in the experiment. Mean effective PFD in the experiment was calculated by assuming that PFD above different threshold values (100, 200 μmol m-2 s-1 etc.) has no effect on the growth (has reached the light saturation level) of the algae (Figure 4).


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 photon flux density (PFD) of daylight during the experimental period.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: The photon flux density (PFD) of daylight during the experimental period.
Mentions: In this experiment the microalgae were grown outdoors during four days under the different CO2 treatments in full daylight and in 70% daylight by shading with white plastic (Figure 3). The bottles were closely placed adjacent to each other in water baths in rows with six bottles facing to the south. In the forefront row the culture received full daylight while the shade was given on the back row placed about 30 cm behind. Two water baths were needed for the 24 bottles including four CO2 and two light treatments. The temperature was as a mean 24°C, varying from a peak of around 30°C at midday down to around 22°C during the night. The experiment was carried out in mid-September and the day length was 12.5 h (06.50 – 19.30 h). The building of the power station was located a few meters north of the experiment. The PFD varied from 0 to a maximum of about 1600 μmol m-2 s-1 in full daylight and up to about 1100 μmol m-2 s-1 in shaded conditions (Figure 2). The mean PAR was 17.1 and 12.0 mol m-2 day-1 in full daylight and in shaded conditions, respectively. At the Meterological station 5 km from the experimental site (Østad, Sarpsborg, 59°N, 11°E) the corresponding daylight was measured to 19.7 mol m-2 day-1 when converted from global radiation to PAR (www.bioforsk.no, Agricultural Meteorological service). The higher measured value here was probably due to the light sensor with 180° view (Kipp & Zonen, CM11 pyranometer) and more diffuse light from the north since the building shaded for the light from this direction in the experiment. Mean effective PFD in the experiment was calculated by assuming that PFD above different threshold values (100, 200 μmol m-2 s-1 etc.) has no effect on the growth (has reached the light saturation level) of the algae (Figure 4).

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