Microalgal CO2 capture at extreme pH values

Jonna Piiparinen, Dorothee Barth, Niels T. Eriksen, Sebastian Teir, Kristian Spilling, Marilyn G. Wiebe

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Although algae are often grown at pH values between 6 and 8, shifting to more alkali or acidic conditions may benefit CO2 delivery to algal cultures. To assess the impact of culture pH on growth rate and uptake of CO2, we grew three relatively fast growing acidophilic (Coccomyxa sp., Euglena mutabilis and Euglena gracilis) and three alkaliphilic (Thalassiosira pseudonana, Phaeodactylum tricornutum, Chlamydomonas sp.) algal species at pH values near neutral and near the extreme of their growth range. All six species showed similar growth and CO2 uptake ability at extreme as at neutral pH values. Cultures of the alkaliphilic species captured a higher proportion of CO2 from the gas stream than the acidophilic species; removing 50 to 65% of CO2 from air compared to only 38% removed by acidophilic species (or 10–24% from CO2 enriched air). Alkaliphilic species did not become carbon limited when fed CO2 at the concentration provided by air (0.04% CO2), but produced less biomass and captured less total CO2 (0.06 to 0.08 g CO2 per day) than the acidophilic species (0.6–0.8 g CO2 day−1) which required CO2 enriched air to avoid carbon limitation. Bicarbonate feeding reduced the loss of CO2 to the environment, compared to feeding gaseous CO2, but with a potential cost in reduced specific growth rate or biomass production.

Original languageEnglish
Pages (from-to)321-328
Number of pages8
JournalAlgal Research
Volume32
DOIs
Publication statusPublished - 1 Jun 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

carbon dioxide
air
algae
Coccomyxa
uptake mechanisms
Euglena
Euglena gracilis
Phaeodactylum tricornutum
carbon
Thalassiosira
Chlamydomonas
bicarbonates
alkalis
specific growth rate
biomass production
gases
biomass

Keywords

  • Bicarbonate
  • CO uptake
  • Microalgae
  • pH
  • Specific growth rate

Cite this

Piiparinen, Jonna ; Barth, Dorothee ; Eriksen, Niels T. ; Teir, Sebastian ; Spilling, Kristian ; Wiebe, Marilyn G. / Microalgal CO2 capture at extreme pH values. In: Algal Research. 2018 ; Vol. 32. pp. 321-328.
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Piiparinen, J, Barth, D, Eriksen, NT, Teir, S, Spilling, K & Wiebe, MG 2018, 'Microalgal CO2 capture at extreme pH values', Algal Research, vol. 32, pp. 321-328. https://doi.org/10.1016/j.algal.2018.04.021

Microalgal CO2 capture at extreme pH values. / Piiparinen, Jonna; Barth, Dorothee; Eriksen, Niels T.; Teir, Sebastian; Spilling, Kristian; Wiebe, Marilyn G.

In: Algal Research, Vol. 32, 01.06.2018, p. 321-328.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Microalgal CO2 capture at extreme pH values

AU - Piiparinen, Jonna

AU - Barth, Dorothee

AU - Eriksen, Niels T.

AU - Teir, Sebastian

AU - Spilling, Kristian

AU - Wiebe, Marilyn G.

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Y1 - 2018/6/1

N2 - Although algae are often grown at pH values between 6 and 8, shifting to more alkali or acidic conditions may benefit CO2 delivery to algal cultures. To assess the impact of culture pH on growth rate and uptake of CO2, we grew three relatively fast growing acidophilic (Coccomyxa sp., Euglena mutabilis and Euglena gracilis) and three alkaliphilic (Thalassiosira pseudonana, Phaeodactylum tricornutum, Chlamydomonas sp.) algal species at pH values near neutral and near the extreme of their growth range. All six species showed similar growth and CO2 uptake ability at extreme as at neutral pH values. Cultures of the alkaliphilic species captured a higher proportion of CO2 from the gas stream than the acidophilic species; removing 50 to 65% of CO2 from air compared to only 38% removed by acidophilic species (or 10–24% from CO2 enriched air). Alkaliphilic species did not become carbon limited when fed CO2 at the concentration provided by air (0.04% CO2), but produced less biomass and captured less total CO2 (0.06 to 0.08 g CO2 per day) than the acidophilic species (0.6–0.8 g CO2 day−1) which required CO2 enriched air to avoid carbon limitation. Bicarbonate feeding reduced the loss of CO2 to the environment, compared to feeding gaseous CO2, but with a potential cost in reduced specific growth rate or biomass production.

AB - Although algae are often grown at pH values between 6 and 8, shifting to more alkali or acidic conditions may benefit CO2 delivery to algal cultures. To assess the impact of culture pH on growth rate and uptake of CO2, we grew three relatively fast growing acidophilic (Coccomyxa sp., Euglena mutabilis and Euglena gracilis) and three alkaliphilic (Thalassiosira pseudonana, Phaeodactylum tricornutum, Chlamydomonas sp.) algal species at pH values near neutral and near the extreme of their growth range. All six species showed similar growth and CO2 uptake ability at extreme as at neutral pH values. Cultures of the alkaliphilic species captured a higher proportion of CO2 from the gas stream than the acidophilic species; removing 50 to 65% of CO2 from air compared to only 38% removed by acidophilic species (or 10–24% from CO2 enriched air). Alkaliphilic species did not become carbon limited when fed CO2 at the concentration provided by air (0.04% CO2), but produced less biomass and captured less total CO2 (0.06 to 0.08 g CO2 per day) than the acidophilic species (0.6–0.8 g CO2 day−1) which required CO2 enriched air to avoid carbon limitation. Bicarbonate feeding reduced the loss of CO2 to the environment, compared to feeding gaseous CO2, but with a potential cost in reduced specific growth rate or biomass production.

KW - Bicarbonate

KW - CO uptake

KW - Microalgae

KW - pH

KW - Specific growth rate

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DO - 10.1016/j.algal.2018.04.021

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JO - Algal Research

JF - Algal Research

SN - 2211-9264

ER -