Please use this identifier to cite or link to this item: http://hdl.handle.net/10321/2376
Title: The optimization of biomass and lipid yields of Chlorella sorokiniana when using wastewater supplemented with different nitrogen sources.
Authors: Ramanna, Luveshan 
Guldhe, Abhishek 
Rawat, Ismail 
Bux, Faizal 
Keywords: Wastewater;Urea;Microalgae;PAM fluorometry;Biodiesel
Issue Date: Sep-2014
Publisher: Pubmed
Source: Ramanna, L.; Guldhe, A.; Rawat, I. and Bux, F. 2014. The optimization of biomass and lipid yields of Chlorella sorokiniana when using wastewater supplemented with different nitrogen sources.Bioresource Technology. 168:127-35.
Abstract: The potential of nitrogen sources supplementing domestic wastewater for the cultivation of microalgae was assessed. Urea, potassium nitrate, sodium nitrate and ammonium nitrate were evaluated for their effect on cultivation and lipid production of Chlorella sorokiniana. Urea showed the highest biomass yield of 0.220 g L􀀁1 and was selected for further experimentation. Urea concentrations (0–10 g L􀀁1) were assessed for their effect on growth and microalgal physiology using pulse amplitude modulated fluorometry. A concentration of 1.5 g L􀀁1 urea produced 0.218 g L􀀁1 biomass and 61.52% lipid by relative fluorescence. Physiological stress was evident by the decrease in relative Electron Transport Rate from 10.45 to 6.77 and quantum efficiency of photosystem II charge separation from 0.665 to 0.131. Gas chromatography analysis revealed that C16:0, C18:0, C18:1, C18:2 and C18:3 were the major fatty acids produced by C. sorokiniana. Urea proved to be an effective nitrogen supplement for cultivation of C. sorokiniana in wastewater.
URI: http://hdl.handle.net/10321/2376
ISSN: 0960-8524
Appears in Collections:Research Publications (Water and Wastewater Technology)

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