Direct Study of CO2 Capture Efficiency during Microalgae Arthrospira platensis Cultivation at High CO2 Concentrations

Direct study of CO2 capture efficiency during microalgae Arthrospira platensis cultivation at high CO2 concentrations was carried out. Microalgae were grown in a 90 L photobioreactor on Zarrouk’s medium prepared with distilled water. Three 15-day experiments were carried out with different initial CO2 concentrations: 1, 5, and 9 vol.%. During the experiments, both the change in the optical density of the microalgae suspension and the direct change in the CO2 concentration in the chamber were measured. The maximum decrease in CO2 concentration due to the growth of microalgae was 0.10 vol.% (CO2)/day in the experiment with an initial CO2 concentration of 5 vol.%. Growth rate of biomass density was 79.4, 76.3, and 48.4 (mg/L)/day at 1, 5, and 9 vol.% CO2 concentrations, respectively. During the experiment with initial CO2 concentrations of 1 and 5 vol.%., pH of the culture medium was increased, but pH was decreased from 9.2 to 8.8 at 9 vol.%. In general, good viability (high quality of biomass and high rate of its growth) of Arthrospira platensis was established at 1 and 5 vol. (CO2)%, while massive death of Arthrospira platensis cells was observed in the experiment with 9 vol. (CO2)%. Biochemical analysis of the resulting biomass revealed a decrease in the content of lipids and proteins with an increase in CO2 concentration.

Authors
Chunzhuk Elizaveta A.2 , Grigorenko Anatoly V.2 , Chernova Nadezhda I.2, 3 , Kiseleva Sofya V.2, 3 , Ryndin Kirill G.2 , Popel Oleg S.2 , Malaniy Sergey Ya4 , Slavkina Olga V.4 , De Farias Neves Fabio5 , Leng Lijian6 , Kumar Vinod 1, 7 , Vlaskin Mikhail S. 2, 1, 7
Journal
Publisher
MDPI AG
Number of issue
2
Language
English
Pages
822
Status
Published
Volume
16
Year
2023
Organizations
  • 1 Peoples’ Friendship University of Russia (RUDN University)
  • 2 Joint Institute for High Temperatures, Russian Academy of Sciences, 125412 Moscow, Russia
  • 3 Faculty of Geography, Lomonosov Moscow State University, 119991 Moscow, Russia
  • 4 Lukoil-Engineering LLC, 109028 Moscow, Russia
  • 5 Department of Fisheries Engineering, Santa Catarina State University (UDESC), Florianópolis 88790-000, SC, Brazil
  • 6 School of Energy Science and Engineering, Central South University, Changsha 410083, China
  • 7 Department of Life Science, Graphic Era (Deemed to Be University), Dehradun 248002, Uttarakhand, India
Keywords
CO2 capture; Arthrospira platensis; Spirulina platensis; photobioreactor; direct study; microalgae cultivation; high CO2 concentrations
Date of creation
16.11.2023
Date of change
16.11.2023
Short link
https://repository.rudn.ru/en/records/article/record/94481/
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