Optimizing Carbon Dioxide Utilization for Microalgae Biofilm Cultivation

W.M. Blanken, S. Schaap, S. Theobald, A. Rinzema, R.H. Wijffels, M.G.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

The loss of carbon dioxide (CO2) to the environment
during microalgae cultivation is undesirable for both environmental
and economic reasons. In this study, a phototrophic biofilm growth
model was developed and validated with the objective to maximize
both CO2 utilization efficiency and production of microalgae in
biofilms. The model was validated in growth experiments with CO2
as the limiting substrate. The CO2 utilization and biomass
productivity were maximized by changing the gas flow rate, the
number of biofilm reactors in series and gas composition. Based on
simulations, the maximum CO2 utilization efficiency that was
reached was 96% based on a process employing flue gas. The
corresponding drop in productivity was only 2% in comparison to
the non-CO2 limited reference situation. In order to achieve this, 25
biofilm reactors units, or more,must be operated in series. Based on
these results, it was concluded that concentrated CO2 streams and
plug flow behavior of the gaseous phase over the biofilm surface are
essential for high productivity and CO2 utilization efficiency.
Original languageEnglish
Pages (from-to)769-776
JournalBiotechnology and Bioengineering
Volume114
Issue number4
DOIs
Publication statusPublished - 2017

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Microalgae
Biofilms
Carbon Dioxide
Carbon dioxide
Gases
Productivity
Stream flow
Flue gases
Flow of gases
Economics
Flow rate
Substrates
Growth
Chemical analysis
Experiments

Cite this

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title = "Optimizing Carbon Dioxide Utilization for Microalgae Biofilm Cultivation",
abstract = "The loss of carbon dioxide (CO2) to the environmentduring microalgae cultivation is undesirable for both environmentaland economic reasons. In this study, a phototrophic biofilm growthmodel was developed and validated with the objective to maximizeboth CO2 utilization efficiency and production of microalgae inbiofilms. The model was validated in growth experiments with CO2as the limiting substrate. The CO2 utilization and biomassproductivity were maximized by changing the gas flow rate, thenumber of biofilm reactors in series and gas composition. Based onsimulations, the maximum CO2 utilization efficiency that wasreached was 96{\%} based on a process employing flue gas. Thecorresponding drop in productivity was only 2{\%} in comparison tothe non-CO2 limited reference situation. In order to achieve this, 25biofilm reactors units, or more,must be operated in series. Based onthese results, it was concluded that concentrated CO2 streams andplug flow behavior of the gaseous phase over the biofilm surface areessential for high productivity and CO2 utilization efficiency.",
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Optimizing Carbon Dioxide Utilization for Microalgae Biofilm Cultivation. / Blanken, W.M.; Schaap, S. ; Theobald, S.; Rinzema, A.; Wijffels, R.H.; Janssen, M.G.J.

In: Biotechnology and Bioengineering, Vol. 114, No. 4, 2017, p. 769-776.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Optimizing Carbon Dioxide Utilization for Microalgae Biofilm Cultivation

AU - Blanken, W.M.

AU - Schaap, S.

AU - Theobald, S.

AU - Rinzema, A.

AU - Wijffels, R.H.

AU - Janssen, M.G.J.

PY - 2017

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AB - The loss of carbon dioxide (CO2) to the environmentduring microalgae cultivation is undesirable for both environmentaland economic reasons. In this study, a phototrophic biofilm growthmodel was developed and validated with the objective to maximizeboth CO2 utilization efficiency and production of microalgae inbiofilms. The model was validated in growth experiments with CO2as the limiting substrate. The CO2 utilization and biomassproductivity were maximized by changing the gas flow rate, thenumber of biofilm reactors in series and gas composition. Based onsimulations, the maximum CO2 utilization efficiency that wasreached was 96% based on a process employing flue gas. Thecorresponding drop in productivity was only 2% in comparison tothe non-CO2 limited reference situation. In order to achieve this, 25biofilm reactors units, or more,must be operated in series. Based onthese results, it was concluded that concentrated CO2 streams andplug flow behavior of the gaseous phase over the biofilm surface areessential for high productivity and CO2 utilization efficiency.

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SN - 0006-3592

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