Biomitigation of CO2 from Flue Gas by Scenedesmus Obtusiusculus AT-UAM Using a Hybrid Photobioreactor Coupled to a Biomass Recovery Stage by Electro-Coagulation-Flotation
Abstract
The microalga Scenedesmus obtusiusculus AT-UAM efficiently captured CO 2 from two flue gas streams in a hybrid photobioreactor located in a greenhouse. Uptake rates of CO 2, NO, and SO 2 from a formulated gas stream were 160.7 mg L-1 day-1, 0.73 mg L-1 day-1, and 1.56 mg L-1 day-1, respectively, with removal efficiencies of 100% for all gases. Exhaust gases of a motor generator were also removed with uptake rates of 111.4 mg L-1 day-1, 0.42 mg L-1 day-1, and 0.98 mg L-1 day-1, obtaining removal efficiencies of 77%, 71%, and 53% for CO 2, NO x, and SO 2, respectively. On average, 61% of the CO 2 from both flue gas streams was assimilated as microalgal biomass. The maximum CO 2 uptake rate of 182 mg L-1 day-1 was achieved for formulated flue gas flow rate above 100 mL min-1. The biomass recovery of 88% was achieved using a 20-L electro-coagulation-flotation chamber coupled to a settler with a low specific power consumption of 0.27 kWh kg-1. The photobioreactor was operated for almost 7 months without contamination of invasive species or a decrease in the activity. It is a very encouraging result for long-term operation in flue gas treatment.
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Exhaust gas from biogas combustion as a CO2 source has been considered promising, but the assumptions described were not based on research.
“So far, this source of CO2 has been considered promising, but the assumptions described were not based on research [46,47].”
From The Use of the Autotrophic Culture of Arthrospira platensis for CO2 Fixation from Biogas Combustion (2024) · cites this paper as [46]
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Review on the Recent Structural Advances in Open and Closed Systems for Carbon Capture through Algae
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The Use of the Autotrophic Culture of Arthrospira platensis for CO2 Fixation from Biogas Combustion
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- Authors
- Estrada-Graf, A., Hernández, S., & Morales, M.
- Affiliations
- Universidad Autónoma Metropolitana (MX)
- Corresponding author
- Morales, Marcia
- Venue
- Environmental Science and Pollution Research
- Published
- 2020-03-04
- Volume
- 27
- Issue
- 23
- Pages
- 28561-28574
- ISSN
- 0944-1344 (ISSN-L)
- 1614-7499
- OpenAlex
- W3009676260
- Cited by
- 25
- References
- 59
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 4 · 2023: 3 · 2022: 5 · 2021: 3 · 2020: 1
- FWCI
- 0.59
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Science and Pollution Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Consejo Nacional de Ciencia y Tecnología (Proyecto 247006)
- Secretaría de Energía (Proyecto: 247006)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
- Physical Sciences › Engineering › Mechanical Engineering › Industrial Gas Emission Control
- Keywords
- CO2 capture, flue gas treatment, Scenedesmus obtusiusculus, microalgae, NOx removal, SO2 removal, greenhouse cultivation, long-term operation
- MeSH terms
- Carbon Dioxide, Gases, Biomass, Scenedesmus, Microalgae, Photobioreactors
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