CO2 bio-fixation and biofuel production in an airlift photobioreactor by an isolated strain of microalgae Coelastrum sp. SM under high CO2 concentrations

Microalgae cultivation is a promising approach to remove ambient CO 2 via photosynthesis process. This paper investigates the impact of high CO 2 concentrations (6, 12, and 16%) on algae growth, CO 2 biofixation, lipid and carbohydrate contents, and nutrient removal of newly isolated microalgae, Coe...

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Published in:Environmental science and pollution research international 2018-10, Vol.25 (30), p.30139-30150
Main Authors: Mousavi, Shokouh, Najafpour, Ghasem D., Mohammadi, Maedeh
Format: Article
Language:English
Subjects:
Algae
Aquatic microorganisms
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Biodiesel fuels
Biofuels
Carbohydrates
Carbon dioxide
Carbon dioxide fixation
Carbon sequestration
Coelastrum
Cultivation
Diesel
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Fatty acids
Lipids
Microalgae
Nutrient removal
Photosynthesis
Research Article
Waste Water Technology
Wastewater
Water Management
Water Pollution Control
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description Microalgae cultivation is a promising approach to remove ambient CO 2 via photosynthesis process. This paper investigates the impact of high CO 2 concentrations (6, 12, and 16%) on algae growth, CO 2 biofixation, lipid and carbohydrate contents, and nutrient removal of newly isolated microalgae, Coelastrum sp. SM. In addition, the ability of microalgae to produce biodiesel at optimal condition was studied. The microalgae were cultivated in wastewater using an airlift photobioreactor. Under 12% CO 2 , the maximum biomass productivity and CO 2 fixation rate were 0.267 g L −1  day −1 and 0.302 g L −1  h −1 , respectively. Total Kjeldahl nitrogen (TKN), total phosphorous (TP), nitrate, and sCOD removal efficiency were 84.01, 100, 86.811, and 73.084%, respectively. Under 12% CO 2 and at the same condition for cell growth, the highest lipid and carbohydrate contents were 3 7.91 and 58.45%, respectively. The composition of fatty acids methyl ester (FAME) of the microalga lipid was defined. Based on the obtained results and FAME profile, Coelastrum sp. SM was a suitable feedstock for biodiesel production and also, the organism had a great potential for CO 2 biofixation, which is also more suitable than any other reported strains in other related studies.
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subjects Algae
Aquatic microorganisms
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Biodiesel fuels
Biofuels
Carbohydrates
Carbon dioxide
Carbon dioxide fixation
Carbon sequestration
Coelastrum
Cultivation
Diesel
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Fatty acids
Lipids
Microalgae
Nutrient removal
Photosynthesis
Research Article
Waste Water Technology
Wastewater
Water Management
Water Pollution Control
title CO2 bio-fixation and biofuel production in an airlift photobioreactor by an isolated strain of microalgae Coelastrum sp. SM under high CO2 concentrations
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