Nutrient remediation rates in municipal wastewater and their effect on biochemical composition of the microalga Scenedesmus sp. AMDD

Download
  1. Get@NRC: Nutrient remediation rates in municipal wastewater and their effect on biochemical composition of the microalga Scenedesmus sp. AMDD (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.algal.2013.01.009
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleAlgal Research
Volume2
Issue2
Pages127134; # of pages: 8
SubjectMicroalgae; Chemostat; Bioenergy; Biofuels; Wastewater
AbstractMicroalgae are very efficient at removing nutrients from municipal wastewater and may be a viable tertiary wastewater treatment while additionally improving the economics of microalgal cultivation for biofuel production. The relative quantities and productivities of fatty acids, carbohydrates and proteins were determined in the microalga Scenedesmus sp. AMDD grown in treated municipal wastewater in continuous chemostats under different dilution rates or hydraulic retention times. The dilution rate of the chemostat exerted a strong control over the biochemical composition of the cultivated biomass and clear differences in the patterns of accumulation of cellular constituents were detected. Maximum carbohydrate and protein productivities were estimated to be 130 and 120 mg L⁻¹ d⁻¹, respectively, at dilution rates of 0.5 d⁻¹ and 1.05 d⁻¹, respectively. Fatty acid productivity was fairly constant at about 20 mg L⁻¹ d⁻¹ across all tested dilution rates. Total fatty acid only accumulated when growth rates were very low or when a prolonged nutrient starvation regime was imposed by interrupting the supply of wastewater to the chemostat. Monounsaturated fatty acids increased by 250%, whereas polyunsaturated fatty acids decreased by 60% and saturated fatty acids remained fairly constant, from the highest dilution rate of 1.05 d⁻¹ to nutrient starved cells. The rate of wastewater nutrient remediation therefore strongly controls the composition of the biomass, thereby controlling its commercial applicability.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; Aquatic and Crop Resource Development
Peer reviewedYes
NRC number55485
NPARC number21268174
Export citationExport as RIS
Report a correctionReport a correction
Record identifier5f553b97-72f9-4c25-b026-812885664819
Record created2013-05-16
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)