Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 417544
Title Growth of the microalgae Neochloris oleoabundans at high partial oxygen pressures and sub-saturating light intensity
Author(s) Sousa, C.A.; Winter, L. de; Janssen, M.G.J.; Vermue, M.H.; Wijffels, R.H.
Source Bioresource Technology 104 (2012). - ISSN 0960-8524 - p. 565 - 570.
Department(s) Bioprocess Engineering
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) chlorella-sorokiniana - photobioreactor - photoinhibition - photosynthesis - cultures - chlamydomonas - temperature - efficiency - biodiesel - evolution
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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