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Sugar-stimulated CO2 sequestration by the green microalga Chlorella vulgaris

Sugar-stimulated CO2 sequestration by the green microalga Chlorella vulgaris

Title: Sugar-stimulated CO2 sequestration by the green microalga Chlorella vulgaris
Author: Fu, Weiqi   orcid.org/0000-0002-7368-383X
Guðmundsson, Steinn   orcid.org/0000-0002-2758-2720
Wichuk, Kristine
Palsson, Sirus
Pálsson, Bernhard Ö
Salehi-Ashtiani, Kourosh
Brynjolfsson, Sigurdur   orcid.org/0000-0001-9435-2258
Date: 2019-03
Language: English
Scope: 275-283
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Department: Rannsóknarsetur í kerfislíffræði (HÍ)
Center for Systems Biology (UI)
Iðnaðarverkfræði-, vélaverkfræði- og tölvunarfræðideild (HÍ)
Faculty of Industrial Eng., Mechanical Eng. and Computer Science (UI)
Series: Science of The Total Environment;654(1)
ISSN: 0048-9697
1879-1026 (eISSN)
DOI: 10.1016/j.scitotenv.2018.11.120
Subject: Environmental Engineering; Waste Management and Disposal; Pollution; Environmental Chemistry; Chlorella vulgaris; CO2 capture; Microalga; Umhverfisverkfræði; Úrgangur; Mengun; Koltvíoxíð; Grænþörungar
URI: https://hdl.handle.net/20.500.11815/905

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Fu, W., Gudmundsson, S., Wichuk, K., Palsson, S., Palsson, B. O., Salehi-Ashtiani, K., & Brynjólfsson, S. (2019). Sugar-stimulated CO2 sequestration by the green microalga Chlorella vulgaris. Science of The Total Environment, 654, 275-283. doi:https://doi.org/10.1016/j.scitotenv.2018.11.120


To convert waste CO2 from flue gases of power plants into value-added products, bio-mitigation technologies show promise. In this study, we cultivated a fast-growing species of green microalgae, Chlorella vulgaris, in different sizes of photobioreactors (PBRs) and developed a strategy using small doses of sugars for enhancing CO2 sequestration under light-emitting diode illumination. Glucose supplementation at low levels resulted in an increase of photoautotrophic growth-driven biomass generation as well as CO2 capture by 10% and its enhancement corresponded to an increase of supplied photon flux. The utilization of urea instead of nitrate as the sole nitrogen source increased photoautotrophic growth by 14%, but change of nitrogen source didn't compromise glucose-induced enhancement of photoautotrophic growth. The optimized biomass productivity achieved was 30.4% higher than the initial productivity of purely photoautotrophic culture. The major pigments in the obtained algal biomass were found comparable to its photoautotrophic counterpart and a high neutral lipids productivity of 516.6 mg/(L·day) was achieved after optimization. A techno-economic model was also developed, indicating that LED-based PBRs represent a feasible strategy for converting CO2 into value-added algal biomass.


Post-print (lokagerð höfundar) opið á: https://systemsbiology.hi.is/wp-content/uploads/2018/11/Sugar-stimulated-CO2-sequestration-by-the-green-microalga-Chlorella-vulgaris-draft.pdf


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