In this work, white wine lees (WWL), cheese whey (CW), and glycerol (GLY) were used as carbon (C) sources to mixotrophically support the production of the microalga Nannochloropsis salina, replacing CO2 supply. In doing so, the alga was allowed to grow on C sources dosed at 2 g L−1, 3 g L−1, and 4 g L−1 of C, in the presence and absence of CO2 supply. WWL and CW were not able to support the algal growth due to a fungal contamination that was genomically identified, while GLY gave interesting results in particular with 3 g L−1 of C. GLY-C was able to replace CO2-C completely when the latter was omitted, showing an algal biomass production similar to those obtained in autotrophy. If CO2-C was provided jointly with GLY-C, biomass production and lipid contents increased more than 30% and 23%, respectively, compared to autotrophy.

Organic wastes/by-products as alternative to CO2 for producing mixotrophic microalgae enhancing lipid production / D. Veronesi, G. D'Imporzano, B. Menin, S. Salati, F. Adani. - In: BIOPROCESS AND BIOSYSTEMS ENGINEERING. - ISSN 1615-7591. - 43:10(2020 Oct), pp. 1911-1919. [10.1007/s00449-020-02381-x]

Organic wastes/by-products as alternative to CO2 for producing mixotrophic microalgae enhancing lipid production

Veronesi D.;D'Imporzano G.;Salati S.;Adani F.
2020-10

Abstract

In this work, white wine lees (WWL), cheese whey (CW), and glycerol (GLY) were used as carbon (C) sources to mixotrophically support the production of the microalga Nannochloropsis salina, replacing CO2 supply. In doing so, the alga was allowed to grow on C sources dosed at 2 g L−1, 3 g L−1, and 4 g L−1 of C, in the presence and absence of CO2 supply. WWL and CW were not able to support the algal growth due to a fungal contamination that was genomically identified, while GLY gave interesting results in particular with 3 g L−1 of C. GLY-C was able to replace CO2-C completely when the latter was omitted, showing an algal biomass production similar to those obtained in autotrophy. If CO2-C was provided jointly with GLY-C, biomass production and lipid contents increased more than 30% and 23%, respectively, compared to autotrophy.
Algae production; Carbon dioxide; Mixotrophy; Organic by-products; Organic wastes
Settore AGR/13 - Chimica Agraria
Integrated algae based biorefinery from renewable carbon sources to produce high value products
BIOPROCESS AND BIOSYSTEMS ENGINEERING
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/767807
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