Turbidostat operation of outdoor pilot-scale photobioreactors

Jeroen H. de Vree*, Rouke Bosma, Rick Wieggers, Snezana Gegic, Marcel Janssen, Maria J. Barbosa, René H. Wijffels

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

The effect of biomass concentration on areal productivity and photosynthetic efficiency of Nannochloropsis sp. CCAP211/78 was studied in three outdoor pilot-scale photobioreactors: an open raceway pond (OPR), a horizontal tubular (HT) photobioreactor and a vertically stacked horizontal tubular (VT) photobioreactor. The reactors were operated continuously as turbidostat at different biomass concentrations. For all systems highest areal productivities were obtained on days with a high light intensity, while the highest photosynthetic efficiencies were obtained on days with a low light intensity. Ground areal biomass concentration exceeding 51 g m-2 had a negative effect on the areal productivity and photosynthetic efficiency. No significant effect of biomass concentration on the productivity was found for the HT at ground areal biomass concentration lower than 51 g m-2. Also for the VT, no significant effect of biomass concentration was found with the exception of the highest biomass concentration of 2.0 g L-1 (68 g m-2) resulting in decreased productivity. For the open raceway pond the highest biomass concentration (0.5 g L-1 or 94 g m-2) resulted in significantly lower areal productivity, compared to the lower biomass concentration (0.25 g L 47 g m-2). Highest areal productivities were obtained for OPR and VT, most likely due to more efficient light interception. In this study we observed that night biomass loss was coupled to net growth. At lower biomass concentrations and concomitant higher growth rates the specific biomass loss rate was higher. Microalgal specific light absorption coefficient was correlated to biomass concentration; higher biomass concentrations resulted in higher specific absorption coefficients, resulting in a steeper light gradient in the microalgal cultures.

Original languageEnglish
Pages (from-to)198-208
JournalAlgal Research
Volume18
DOIs
Publication statusPublished - 2016

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biomass
raceways
light intensity
Nannochloropsis
specific growth rate

Keywords

  • Areal productivity
  • Biomass concentration
  • Microalgae
  • Nannochloropsis sp.
  • Outdoor pilot-scale photobioreactors
  • Photosynthetic efficiency

Cite this

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title = "Turbidostat operation of outdoor pilot-scale photobioreactors",
abstract = "The effect of biomass concentration on areal productivity and photosynthetic efficiency of Nannochloropsis sp. CCAP211/78 was studied in three outdoor pilot-scale photobioreactors: an open raceway pond (OPR), a horizontal tubular (HT) photobioreactor and a vertically stacked horizontal tubular (VT) photobioreactor. The reactors were operated continuously as turbidostat at different biomass concentrations. For all systems highest areal productivities were obtained on days with a high light intensity, while the highest photosynthetic efficiencies were obtained on days with a low light intensity. Ground areal biomass concentration exceeding 51 g m-2 had a negative effect on the areal productivity and photosynthetic efficiency. No significant effect of biomass concentration on the productivity was found for the HT at ground areal biomass concentration lower than 51 g m-2. Also for the VT, no significant effect of biomass concentration was found with the exception of the highest biomass concentration of 2.0 g L-1 (68 g m-2) resulting in decreased productivity. For the open raceway pond the highest biomass concentration (0.5 g L-1 or 94 g m-2) resulted in significantly lower areal productivity, compared to the lower biomass concentration (0.25 g L 47 g m-2). Highest areal productivities were obtained for OPR and VT, most likely due to more efficient light interception. In this study we observed that night biomass loss was coupled to net growth. At lower biomass concentrations and concomitant higher growth rates the specific biomass loss rate was higher. Microalgal specific light absorption coefficient was correlated to biomass concentration; higher biomass concentrations resulted in higher specific absorption coefficients, resulting in a steeper light gradient in the microalgal cultures.",
keywords = "Areal productivity, Biomass concentration, Microalgae, Nannochloropsis sp., Outdoor pilot-scale photobioreactors, Photosynthetic efficiency",
author = "{de Vree}, {Jeroen H.} and Rouke Bosma and Rick Wieggers and Snezana Gegic and Marcel Janssen and Barbosa, {Maria J.} and Wijffels, {Ren{\'e} H.}",
year = "2016",
doi = "10.1016/j.algal.2016.06.006",
language = "English",
volume = "18",
pages = "198--208",
journal = "Algal Research",
issn = "2211-9264",
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}

Turbidostat operation of outdoor pilot-scale photobioreactors. / de Vree, Jeroen H.; Bosma, Rouke; Wieggers, Rick; Gegic, Snezana; Janssen, Marcel; Barbosa, Maria J.; Wijffels, René H.

In: Algal Research, Vol. 18, 2016, p. 198-208.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Turbidostat operation of outdoor pilot-scale photobioreactors

AU - de Vree, Jeroen H.

AU - Bosma, Rouke

AU - Wieggers, Rick

AU - Gegic, Snezana

AU - Janssen, Marcel

AU - Barbosa, Maria J.

AU - Wijffels, René H.

PY - 2016

Y1 - 2016

N2 - The effect of biomass concentration on areal productivity and photosynthetic efficiency of Nannochloropsis sp. CCAP211/78 was studied in three outdoor pilot-scale photobioreactors: an open raceway pond (OPR), a horizontal tubular (HT) photobioreactor and a vertically stacked horizontal tubular (VT) photobioreactor. The reactors were operated continuously as turbidostat at different biomass concentrations. For all systems highest areal productivities were obtained on days with a high light intensity, while the highest photosynthetic efficiencies were obtained on days with a low light intensity. Ground areal biomass concentration exceeding 51 g m-2 had a negative effect on the areal productivity and photosynthetic efficiency. No significant effect of biomass concentration on the productivity was found for the HT at ground areal biomass concentration lower than 51 g m-2. Also for the VT, no significant effect of biomass concentration was found with the exception of the highest biomass concentration of 2.0 g L-1 (68 g m-2) resulting in decreased productivity. For the open raceway pond the highest biomass concentration (0.5 g L-1 or 94 g m-2) resulted in significantly lower areal productivity, compared to the lower biomass concentration (0.25 g L 47 g m-2). Highest areal productivities were obtained for OPR and VT, most likely due to more efficient light interception. In this study we observed that night biomass loss was coupled to net growth. At lower biomass concentrations and concomitant higher growth rates the specific biomass loss rate was higher. Microalgal specific light absorption coefficient was correlated to biomass concentration; higher biomass concentrations resulted in higher specific absorption coefficients, resulting in a steeper light gradient in the microalgal cultures.

AB - The effect of biomass concentration on areal productivity and photosynthetic efficiency of Nannochloropsis sp. CCAP211/78 was studied in three outdoor pilot-scale photobioreactors: an open raceway pond (OPR), a horizontal tubular (HT) photobioreactor and a vertically stacked horizontal tubular (VT) photobioreactor. The reactors were operated continuously as turbidostat at different biomass concentrations. For all systems highest areal productivities were obtained on days with a high light intensity, while the highest photosynthetic efficiencies were obtained on days with a low light intensity. Ground areal biomass concentration exceeding 51 g m-2 had a negative effect on the areal productivity and photosynthetic efficiency. No significant effect of biomass concentration on the productivity was found for the HT at ground areal biomass concentration lower than 51 g m-2. Also for the VT, no significant effect of biomass concentration was found with the exception of the highest biomass concentration of 2.0 g L-1 (68 g m-2) resulting in decreased productivity. For the open raceway pond the highest biomass concentration (0.5 g L-1 or 94 g m-2) resulted in significantly lower areal productivity, compared to the lower biomass concentration (0.25 g L 47 g m-2). Highest areal productivities were obtained for OPR and VT, most likely due to more efficient light interception. In this study we observed that night biomass loss was coupled to net growth. At lower biomass concentrations and concomitant higher growth rates the specific biomass loss rate was higher. Microalgal specific light absorption coefficient was correlated to biomass concentration; higher biomass concentrations resulted in higher specific absorption coefficients, resulting in a steeper light gradient in the microalgal cultures.

KW - Areal productivity

KW - Biomass concentration

KW - Microalgae

KW - Nannochloropsis sp.

KW - Outdoor pilot-scale photobioreactors

KW - Photosynthetic efficiency

U2 - 10.1016/j.algal.2016.06.006

DO - 10.1016/j.algal.2016.06.006

M3 - Article

VL - 18

SP - 198

EP - 208

JO - Algal Research

JF - Algal Research

SN - 2211-9264

ER -