TY  - JOUR
AU  - Verspreet, Joran
AU  - Kuchendorf, Christina
AU  - Ackermann, Bärbel
AU  - Bastiaens, Leen
TI  - The Impact of Nutrient Limitation and Harvest Method on the Wet Preservation of Chlorella vulgaris Biomass
JO  - Bioengineering
VL  - 10
IS  - 5
SN  - 2306-5354
CY  - Basel
PB  - MDPI
M1  - FZJ-2024-02708
SP  - 600 -
PY  - 2023
N1  - The applicable Grant was North-West Europe Interreg, grant number NWE 639
AB  - The temporary storage of wet algae concentrates enables the decoupling in time of algae harvests and their biorefinery. However, the impact of cultivation and of the harvest conditions on algae quality during preservation is largely unknown. This study aimed to determine the impact of nutrient limitation and of harvest methods on the preservation of Chlorella vulgaris biomass. Algae were either well-fed until harvest or received no nutrients for one week, and were harvested by either batch or continuous centrifugation. The organic acid formation, lipid levels, and lipolysis were monitored. Nutrient limitation had a large impact and resulted in lower pH values (4.9 ± 0.4), high levels of lactic acid and acetic acid, and a slightly higher degree of lipid hydrolysis. Concentrates of well-fed algae had a higher pH (7.4 ± 0.2) and another pattern of fermentation products with mainly acetic acid, succinic acid, and, to a smaller extent, lactic acid and propionic acid. The effect of the harvest method was smaller, with, most often, higher lactic acid and acetic acid levels for algae harvested by continuous centrifugation than for those obtained by batch centrifugation. In conclusion, nutrient limitation, a well-known method to enhance algae lipid levels, can impact several quality attributes of algae during their wet storage.
LB  - PUB:(DE-HGF)16
C6  - 37237670
UR  - <Go to ISI:>//WOS:000995645700001
DO  - DOI:10.3390/bioengineering10050600
UR  - https://juser.fz-juelich.de/record/1025121
ER  -