title: Synergistic effect of optimizing light-emitting diode illumination quality and intensity to manipulate composition of fatty acid methyl esters from Nannochloropsis sp.
abstract: In the study, the relationship between the quality and intensity of LED illumination with FAMEs produced were investigated. Nannochloropsis sp. was cultivated for 14 days under different intensities of 100, 150 and 200 μmol photons m(-2) s(-1) of red, blue and mixed red blue LED. The findings revealed that suitable combination of LED wavelengths and intensity; (red LED: 150, blue: 100 and mixed red blue: 200 μmol photons m(-2) s(-1)) produced maximum biomass growth and lipid content. It was observed that the quality and intensity of LED significantly influenced the composition of FAMEs. FAMEs produced under blue LED has high degree of unsaturation (DU) and low cetane number while those under red LED has low DU but higher CN. The combination of red blue LED has produced FAMEs with high ignition and lubricating property and also good oxidation stability indicated by the DU and CN values which lies midway between the red and blue.
authors.affiliation: Department of Bioprocess Engineering, Faculty of Chemical Engineering, c/o Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
authors.forename: Chee Loong
authors.initials: CL
authors.lastname: Teo
authors.affiliation: Department of Bioprocess Engineering, Faculty of Chemical Engineering, c/o Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia. Electronic address: ani@cheme.utm.my.
authors.forename: Ani
authors.initials: A
authors.lastname: Idris
authors.affiliation: Department of Industrial Biotechnology, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia.
authors.forename: Nor Azimah Mohd
authors.initials: NAM
authors.lastname: Zain
authors.affiliation: Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, c/o B.M. Nagano Industries Sdn. Bhd., Jalan Keluli 3, Kawasan Perindustrian Pasir Gudang, 81700 Johor, Malaysia.
authors.forename: Mohamad
authors.initials: M
authors.lastname: Taisir
mesh_terms: D018533:Biomass; D004952:Esters; D005227:Fatty Acids / Q000032:analysis*; D008027:Light; D058009:Stramenopiles / Q000737:chemistry* / Q000254:growth & development
chemical_list: D004952:Esters; D005227:Fatty Acids
keywords: Biodiesel; Biomass; Degree of unsaturation; LED; Light intensity