title: Estimation of carbon dioxide sequestration potential of microalgae grown in a batch photobioreactor.
abstract: The carbon dioxide (CO2) sequestration potential of two microalgae, Chlorella pyrenoidosa and Scenedesmus abundans was evaluated in a tubular batch photobioreactor with provision for continuous flow of 10% CO2 enriched air through the headspace. CO2 sequestration and biomass growth was affected by gas flow rate over the range 20-60ml/min and 40ml/min was found to maximize algal growth and CO2 sequestration. Moles of CO2 sequestered over 20h at a gas flow rate of 40ml/min was estimated using a novel rapid screening approach as 0.096 and 0.036, respectively, for C. pyrenoidosa and S. abundans. At this gas flow rate the maximum growth rate was 4.9mgL(-1)h(-1) and 2.5mgL(-1)h(-1) for C. pyrenoidosa and S. abundans, respectively. The CO2 sequestration and growth rate were comparable at height/diameter ratio of 8 and 16.
authors.affiliation: Centre for Environmental Science and Engineering (CESE), Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India.
authors.forename: Wriju
authors.initials: W
authors.lastname: Kargupta
authors.affiliation: Department of Energy Science and Engineering (DESE), Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India.
authors.forename: Anuradda
authors.initials: A
authors.lastname: Ganesh
authors.affiliation: Centre for Environmental Science and Engineering (CESE), Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India. Electronic address: mitras@iitb.ac.in.
authors.forename: Suparna
authors.initials: S
authors.lastname: Mukherji
mesh_terms: D002245:Carbon Dioxide; D057965:Carbon Sequestration; D002254:Carbonates / Q000737:chemistry; D002708:Chlorella / Q000254:growth & development* / Q000378:metabolism; D003470:Culture Media / Q000737:chemistry; D004867:Equipment Design; D058086:Microalgae / Q000254:growth & development* / Q000378:metabolism; D058433:Photobioreactors; D044444:Scenedesmus / Q000254:growth & development* / Q000378:metabolism
chemical_list: D002254:Carbonates; D003470:Culture Media; D002245:Carbon Dioxide
keywords: CO(2) sequestration; Chlorella; Gas flow rate; Microalgae; Scenedesmus