Cultivation of Chlorella protothecoides in photobioreactors: The combined impact of photoperiod and CO2 concentration
PBN-AR
Instytucja
Instytut Agrofizyki im. Bohdana Dobrzańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
ENGINEERING IN LIFE SCIENCES
ISSN
1618-0240
EISSN
1618-2863
Wydawca
WILEY-BLACKWELL
DOI
URL
Rok publikacji
2015
Numer zeszytu
5
Strony od-do
533-541
Numer tomu
15
Identyfikator DOI
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Autorzy
Pozostali autorzy
+ 1
Słowa kluczowe
en
CO2
Chlorella protothecoides
FT-IR spectroscopy
Microalgae
Photoperiod
Streszczenia
Język
en
Treść
Algal biomass is regarded as an alternative source for producing renewable fuels, given the chemical nature of storage products: lipids, starch, and proteins. Many factors affecting the production of microalgal biomass and lipid accumulation include the light and CO2 concentration, i.e. critical factors for determination of the biochemical composition of microalgal biomass. Our objective was to evaluate the effect of three different light/dark photoperiods (12/12 h, 16/8 h, 24/0 h) and the CO2 concentration (from air and 5% v/v CO2-enriched air) on the growth rate, productivity, and changes in the biochemical composition of Chlorella protothecoides biomass. Continuous illumination stimulated growth under supplementation of air CO2. At 5% CO2, the maximum C. protothecoides growth rate was found under 16/8 light/dark cycles and longer duration of light yielded a decrease in the specific growth rate. The photoperiods and CO2 concentrations influenced the biomass productivity. Chlorella protothecoides produced biomass more efficiently at the 24/0 and 16/8 light/dark cycles under supplementation of air CO2 than at addition of 5% CO2. However, under the 12/12 light/dark cycle, biomass productivity was higher at 5% CO2. The light photoperiod greater than 16 h did not increase biomass productivity. These factors also influenced the content of lipids and carbohydrates. A maximal lipid content was observed for the 24-h photoperiod for air CO2, whereas the addition of 5% CO2 affected lipid and carbohydrate production.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
691485
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