Algal Research | VOL. 46
Read

Synergistic effects between autotrophy and heterotrophy in optimization of mixotrophic cultivation of Chlorella sorokiniana in bubble-column photobioreactors

Publication Date Mar 1, 2020

Abstract

Abstract Mixotrophic cultivation of microalgae enables inorganic carbon capture through photosynthesis along with simultaneous organic carbon uptake. Extremophilic microalga Chlorella sorokiniana, capable of tolerating high CO2 levels, was cultivated mixotrophically in 1 L bubble-column photobioreactors. This study shows how the biomass yield increases as the algal CO2 uptake process shifts from being driven by Carbon Concentrating Mechanism (CCM) to being driven by direct diffusion, as the CO2 concentration increases from very low (0%) and low (atmospheric: 0.04%) to high (1%, 2%, 3%, 5%). The biomass yield and productivity increase from 1.05 g/L and 0.33 g/L/day, respectively, at atmospheric CO2 to 1.85 g/L and 0.48 g/L/day, respectively, at 3% CO2, with a corresponding doubling of the lipid yield. Using acetic acid as the organic carbon source allows it to directly enter the metabolic pathways at the acetyl-CoA junction and enhance fatty acid synthesis, while enhanced reactor illumination (below photo-inhibition) synergizes the phototrophic and photo-heterotrophic pathways. These three reactor scale parameters, namely, organic (acetic acid) and inorganic (CO2) carbon loading and illumination, are co-optimized to activate the synergies between the metabolic pathways for autotrophy and heterotrophy in mixotrophic algal growth, which, in turn, significantly enhances the biomass and the macromolecular yields at the cellular scale. This multiscale synergy leads to a four-fold increase in the biomass yield (from 0.7 to 2.79 g/L...

Concepts

Biomass Yield Increase Bubble-column Photobioreactors Biomass Productivity Organic Carbon Mass Cultivation Of Microalgae Carbon Concentrating Mechanism Total Lipid Yield Higher Yields Of Biomass Biomass Yield Value-added Co-products

Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.

Coronavirus Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  5

Introduction: Test solutions (Biotrue, renu Advanced [Bausch and Lomb], ACUVUE RevitaLens [Johnson and Johnson Vision], cleadew [Ophtecs corp.] or AOS...

Read More

Good health Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  2

Patient and public involvement in health care is considered indispensable in the way we conduct daily pediatric neurology practice, and in the develop...

Read More

Quality Of Education Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  5

Ingenta is not the publisher of the publication content on this website. The responsibility for the publication content rests with the publishers prov...

Read More

Gender Equality Research Articles published between Sep 26, 2022 to Oct 02, 2022

R DiscoveryOct 03, 2022
R DiscoveryArticles Included:  3

Introduction: As of early March 2022, the COVID-19 pandemic has killed more 5.9 million people worldwide, and infected more than 437 million.

Read More

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19

ONE PROBLEM . ONE PURPOSE . ONE PLACE

Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.