CD Skripsi
Kultivasi Mikroalga Menggunakan Media Air Gambut Berdasarkan Perbedaan Fotoperiode Dan Sumber Nitrogen
Microalgae is one of the potential alternative energy sources to be develop as biodiesel raw material. Biomass productivity and lipid content are important parameters affecting the feasibility of using microalgae for biodiesel production. Light and nutrition are important factors that influence the growth and lipid content of microalgae. This study aims to determine the effect of photoperiods and nitrogen sources on optical density, specific growth rates and lipid content of microalgae cultivated using peat water media. Microalgae are cultivated using 1500 lux light intensity with different photoperiod cycles (24:0, 18:06 and 12:12 hour light:dark) and nitrogen sources (NaNO3, NH4Cl and Urea). Optical density microalgae was analyzed using a UV-VIS spectrophotometer at a wavelength of 384 nm. Lipid content microalgae was obtained using Bligh-Dyer method. The results showed that the highest optical density and specific growth rate of microalgae Chlorella sp. respectively 1.0404 and 0.37/day were obtained in 24:0 hour light with the addition of urea (88 mg/L) into the peat water. The highest lipid content 28,78% was obtained in 24:0 hour light with the addition NH4Cl (157/mg/L) into peat water media.
Keywords: peat water, photoperiod, lipid, nitrogen, optical density
Tidak tersedia versi lain