Growth of the microalgae Neochloris oleoabundans at high partial oxygen pressures and sub-saturating light intensity

C.A. Sousa, L. de Winter, M.G.J. Janssen, M.H. Vermue, R.H. Wijffels

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)

Abstract

The effect of partial oxygen pressure on growth of Neochloris oleoabundans was studied at sub-saturating light intensity in a fully-controlled stirred tank photobioreactor. At the three partial oxygen pressures tested (PO2=0.24; 0.63; 0.84 bar), the specific growth rate was 1.38; 1.36 and 1.06 day-1, respectively. An increase of the PCO2 from 0.007 to 0.02 bar at PO2 of 0.84 bar resulted in an increase in the growth rate from 1.06 to 1.36 day-1. These results confirm that the reduction of algal growth at high oxygen concentrations at sub-saturating light conditions is mainly caused by competitive inhibition of Rubisco. This negative effect on growth can be overcome by restoring the O2/CO2 ratio by an increase in the partial carbon dioxide pressure. In comparison to general practice , working at partial O2 pressure of 0.84 bar could reduce the energy requirement for degassing by a factor of 3–4.
Original languageEnglish
Pages (from-to)565-570
JournalBioresource Technology
Volume104
DOIs
Publication statusPublished - 2012

Fingerprint

light intensity
Oxygen
oxygen
Photobioreactors
Ribulose-Bisphosphate Carboxylase
Degassing
degassing
Carbon Dioxide
Partial pressure
Carbon dioxide
carbon dioxide
energy
effect

Keywords

  • chlorella-sorokiniana
  • photobioreactor
  • photoinhibition
  • photosynthesis
  • cultures
  • chlamydomonas
  • temperature
  • efficiency
  • biodiesel
  • evolution

Cite this

@article{24747f24daa643ccb400d31bcd3be35d,
title = "Growth of the microalgae Neochloris oleoabundans at high partial oxygen pressures and sub-saturating light intensity",
abstract = "The effect of partial oxygen pressure on growth of Neochloris oleoabundans was studied at sub-saturating light intensity in a fully-controlled stirred tank photobioreactor. At the three partial oxygen pressures tested (PO2=0.24; 0.63; 0.84 bar), the specific growth rate was 1.38; 1.36 and 1.06 day-1, respectively. An increase of the PCO2 from 0.007 to 0.02 bar at PO2 of 0.84 bar resulted in an increase in the growth rate from 1.06 to 1.36 day-1. These results confirm that the reduction of algal growth at high oxygen concentrations at sub-saturating light conditions is mainly caused by competitive inhibition of Rubisco. This negative effect on growth can be overcome by restoring the O2/CO2 ratio by an increase in the partial carbon dioxide pressure. In comparison to general practice , working at partial O2 pressure of 0.84 bar could reduce the energy requirement for degassing by a factor of 3–4.",
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author = "C.A. Sousa and {de Winter}, L. and M.G.J. Janssen and M.H. Vermue and R.H. Wijffels",
year = "2012",
doi = "10.1016/j.biortech.2011.10.048",
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journal = "Bioresource Technology",
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Growth of the microalgae Neochloris oleoabundans at high partial oxygen pressures and sub-saturating light intensity. / Sousa, C.A.; de Winter, L.; Janssen, M.G.J.; Vermue, M.H.; Wijffels, R.H.

In: Bioresource Technology, Vol. 104, 2012, p. 565-570.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Growth of the microalgae Neochloris oleoabundans at high partial oxygen pressures and sub-saturating light intensity

AU - Sousa, C.A.

AU - de Winter, L.

AU - Janssen, M.G.J.

AU - Vermue, M.H.

AU - Wijffels, R.H.

PY - 2012

Y1 - 2012

N2 - The effect of partial oxygen pressure on growth of Neochloris oleoabundans was studied at sub-saturating light intensity in a fully-controlled stirred tank photobioreactor. At the three partial oxygen pressures tested (PO2=0.24; 0.63; 0.84 bar), the specific growth rate was 1.38; 1.36 and 1.06 day-1, respectively. An increase of the PCO2 from 0.007 to 0.02 bar at PO2 of 0.84 bar resulted in an increase in the growth rate from 1.06 to 1.36 day-1. These results confirm that the reduction of algal growth at high oxygen concentrations at sub-saturating light conditions is mainly caused by competitive inhibition of Rubisco. This negative effect on growth can be overcome by restoring the O2/CO2 ratio by an increase in the partial carbon dioxide pressure. In comparison to general practice , working at partial O2 pressure of 0.84 bar could reduce the energy requirement for degassing by a factor of 3–4.

AB - The effect of partial oxygen pressure on growth of Neochloris oleoabundans was studied at sub-saturating light intensity in a fully-controlled stirred tank photobioreactor. At the three partial oxygen pressures tested (PO2=0.24; 0.63; 0.84 bar), the specific growth rate was 1.38; 1.36 and 1.06 day-1, respectively. An increase of the PCO2 from 0.007 to 0.02 bar at PO2 of 0.84 bar resulted in an increase in the growth rate from 1.06 to 1.36 day-1. These results confirm that the reduction of algal growth at high oxygen concentrations at sub-saturating light conditions is mainly caused by competitive inhibition of Rubisco. This negative effect on growth can be overcome by restoring the O2/CO2 ratio by an increase in the partial carbon dioxide pressure. In comparison to general practice , working at partial O2 pressure of 0.84 bar could reduce the energy requirement for degassing by a factor of 3–4.

KW - chlorella-sorokiniana

KW - photobioreactor

KW - photoinhibition

KW - photosynthesis

KW - cultures

KW - chlamydomonas

KW - temperature

KW - efficiency

KW - biodiesel

KW - evolution

U2 - 10.1016/j.biortech.2011.10.048

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JF - Bioresource Technology

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