Performance evaluation of a green process for microalgal CO2 sequestration in closed photobioreactor using flue gas generated in-situ.
In the present study, carbon-dioxide capture from in situ generated flue gas was carried out using Chlorella sp. in bubble column photobioreactors to develop a cost effective process for concomitant carbon sequestration and biomass production. Firstly, a comparative analysis of CO2 sequestration with varying concentrations of CO2 in air-CO2 and air-flue gas mixtures was performed. Chlorella sp. was found to be tolerant to 5% CO2 concentration. Subsequently, inhibitory effect of pure flue gas was minimized using various strategies like use of high initial cell density and photobioreactors in series. The final biofixation efficiency was improved by 54% using the adopted strategies. Further, sequestered microalgal biomass was analyzed for various biochemical constituents for their use in food, feed or biofuel applications.
Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal 721302, India.
Geetanjali
G
Yadav
Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal 721302, India.
Ankush
A
Karemore
Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India.
Sukanta Kumar
SK
Dash
Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal 721302, India. Electronic address: rksen@hijli.iitkgp.ernet.in.
Ramkrishna
R
Sen
D018533:Biomass; D019149:Bioreactors; D002245:Carbon Dioxide / Q000378:metabolism*; D005740:Gases; D058086:Microalgae / Q000378:metabolism*; D055668:Photochemical Processes
D005740:Gases; D002245:Carbon Dioxide
CO(2) fixation; Coal-fired flue gas; Microalgae; Photobioreactor-in-series