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 355904
Title Prediction of volumetric productivity of an outdoor photobioreactor
Author(s) Bosma, R.; Zessen, E. van; Reith, J.H.; Tramper, J.; Wijffels, R.H.
Source Biotechnology and Bioengineering 97 (2007)5. - ISSN 0006-3592 - p. 1108 - 1120.
Department(s) Bioprocess Engineering
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) monodus-subterraneus - microalgal cultures - light - photoinhibition - photosynthesis - cultivation - model - phytoplankton - cyanobacteria - temperature
Abstract Volumetric productivity of Monodus subterraneus cultivated in an outdoor pilot-plant bubble column was predicted with a mathematical model. Two border cases to model the photobioreactor were chosen. Firstly, a model with no light integration in which it is assumed that microalgae can adapt immediately to local light conditions. Secondly, full light integration implicating that microalga can convert all absorbed light with a photosynthetic yield based on average light intensity. Because temperature and light conditions in our photobioreactor changed during the day, photosynthetic yields at any combination of temperature and light intensity were needed. These were determined in repeated-batch lab-scale experiments with an experimental design. The model was evaluated in an outdoor bubble column at different natural light conditions and different temperatures. Volumetric productivities in the bubble column were predicted and compared with experimental volumetric productivities. The light integration model over-estimated productivity, while the model in which we assumed no light integration under-estimated productivity. Light integration occurred partly (47%) during the period investigated. The average observed biomass yield on light was 0.60 g·mol-1. The model of partly light integration predicted an average biomass yield on light of 0.57 g·mol-1 and predicted that productivity could have been increased by 19% if culture temperature would have been maintained at 24°C.
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