Influence of media composition on the growth rate of Chlorella vulgaris and Scenedesmus acutus utilized for CO2 mitigation

Czarena Crofcheck, Michael Monstross, E. Xinyi, Aubrey Shea, Mark Crocker, Rodney Andrews

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Atmospheric carbon dioxide levels have increased since the industrial revolution due to the increase in combustion of fossil fuels. These elevated levels of CO2 have been cited as a significant cause of climate change. Hence, there is a well motivated need to find ways to mitigate CO 2 emissions. Chemical absorption and geological storage of CO 2 have high energy consumption, high capital cost and potential leakage. One possible alternative strategy is the use of microalgae for mitigation of CO2. This paper focuses on the influence of media composition on the growth rate of two microalgae strains, Chlorella vulgaris and Scenedesmus actus. A KNO3 based medium was found to work better for Chlorella, while a urea based equivalent worked better for Scenedesmus. Upon reduction of the urea concentration, the algae growth rate increased slightly, showing that the urea level was not the limiting ingredient in the medium. The urea based media investigated here resulted in growth similar to that found with previously reported KNO3 based media. This should result in an economic benefit in large scale algae cultivation for CO2 mitigation, since urea is typically less expensive than KNO3. Additional media components were tested and it was found that EDTA and vitamin B do not result in a significant increase in algae growth rate.

Original languageEnglish
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012, ASABE 2012
Pages532-549
Number of pages18
StatePublished - 2012
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012 - Dallas, TX, United States
Duration: Jul 29 2012Aug 1 2012

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012, ASABE 2012
Volume1

Conference

ConferenceAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012
Country/TerritoryUnited States
CityDallas, TX
Period7/29/128/1/12

Keywords

  • Algae
  • Chlorella
  • Flue gas
  • Scenedesmus

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Bioengineering

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