title: Enhancing growth and lipid production of marine microalgae for biodiesel production via the use of different LED wavelengths.
abstract: Wavelength of light is a crucial factor which renders microalgae as the potential biodiesel. In this study, Tetraselmis sp. and Nannochloropsis sp. as famous targets were selected. The effect of different light wavelengths on growth rate and lipid production was studied. Microalgae were cultivated for 14 days as under blue, red, red-blue LED and white fluorescent light. The growth rate of microalgae was analyzed by spectrophotometer and cell counting while oil production under improved Nile red method. Optical density result showed the microalgae exhibited better growth curve under blue wavelength. Besides, Tetraselmis sp. and Nannochloropsis sp. under blue wavelength showed the higher growth rate (1.47 and 1.64 day(-1)) and oil production (102.954 and 702.366 a.u.). Gas chromatography analysis also showed that palmitic acid and stearic acid which were compulsory components for biodiesel contribute around 49-51% of total FAME from Nannochloropsis sp. and 81-83% of total FAME from Tetraselmis sp.
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.
authors.forename: Madiha
authors.initials: M
authors.lastname: Atta
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: Attaullah
authors.initials: A
authors.lastname: Bukhari
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
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: Afendi M
authors.initials: AM
authors.lastname: Yusuf
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
mesh_terms: D056804:Biofuels / Q000382:microbiology*; D004952:Esters / Q000378:metabolism; D005453:Fluorescence; D008027:Light; D008055:Lipids / Q000096:biosynthesis*; D058086:Microalgae / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism* / Q000528:radiation effects; D055095:Optics and Photonics; D010078:Oxazines / Q000378:metabolism; D012623:Seawater / Q000382:microbiology*
chemical_list: D056804:Biofuels; D004952:Esters; D008055:Lipids; D010078:Oxazines; C044808:nile red
keywords: Biodiesel; LED; Nannochloropsis sp.; Tetraselmis sp.; Wavelength