Testing the yield of a pilot-scale bubble column photobioreactor for cultivation of the microalga Rhodomonas salina as feed for intensive calanoid copepod cultures

TY - JOUR

T1 - Testing the yield of a pilot-scale bubble column photobioreactor for cultivation of the microalga Rhodomonas salina as feed for intensive calanoid copepod cultures

AU - Vu, Minh Thi Thuy

AU - Jepsen, Per Meyer

AU - Jørgensen, Niels O.G.

AU - Hansen, Benni Winding

AU - Nielsen, Søren Laurentius

PY - 2019

Y1 - 2019

N2 - A dual column photobioreactor (PBR) (2 × 47 L) with mixed CO2/air bubbling was tested for cultivation of the microalga Rhodomonas salina as food for live feed copepods. In the continuous growth phase, the cell density was relatively stable at 2.40 ± 0.13 × 106 cells/ml at an average dilution rate of 0.46 ± 0.02 per day throughout the 30-day experiment. The produced algae had a high content of both total fatty acids (TFA) and free amino acids (FAA). Especially, the harvested algae contained a high proportion of poly-unsaturated fatty acids that made up 80% of the TFA and of essential amino acids (35% of all FAA), implicating desirable components as feed for copepods. The current PBR was sufficient to feed a culture of the calanoid copepod Acartia tonsa at a density of 2,500 adult/L in ca. 500 L culture with a daily yield of approximately 17 × 106 eggs. To be able to sustain the integrated copepods production, the suggested volume of the algae cultures should be ca. 20% of the copepod culture volume.

AB - A dual column photobioreactor (PBR) (2 × 47 L) with mixed CO2/air bubbling was tested for cultivation of the microalga Rhodomonas salina as food for live feed copepods. In the continuous growth phase, the cell density was relatively stable at 2.40 ± 0.13 × 106 cells/ml at an average dilution rate of 0.46 ± 0.02 per day throughout the 30-day experiment. The produced algae had a high content of both total fatty acids (TFA) and free amino acids (FAA). Especially, the harvested algae contained a high proportion of poly-unsaturated fatty acids that made up 80% of the TFA and of essential amino acids (35% of all FAA), implicating desirable components as feed for copepods. The current PBR was sufficient to feed a culture of the calanoid copepod Acartia tonsa at a density of 2,500 adult/L in ca. 500 L culture with a daily yield of approximately 17 × 106 eggs. To be able to sustain the integrated copepods production, the suggested volume of the algae cultures should be ca. 20% of the copepod culture volume.

KW - amino acids

KW - dilution rate

KW - fatty acids

KW - growth rate

KW - live feed

KW - upscaling

U2 - 10.1111/are.13868

DO - 10.1111/are.13868

M3 - Journal article

AN - SCOPUS:85055425854

SN - 1355-557X

VL - 50

SP - 63

EP - 71

JO - Aquaculture Research

JF - Aquaculture Research

IS - 1

ER -