DOI: https://doi.org/10.55373/mjchem.v28i1.270

Keywords: Nannochloropsis sp., petroleum wastewater, light wavelength, biodiesel, light-emitting diode

Abstract

Microalgae have the potential as a source of biodiesel due to their high lipid productivity and ability to grow in variety of environments, including wastewater. Therefore, in this study isolated species Nannochloropsis oculata are cultured in 10% (v/v) petroleum wastewater for 18:06 hours light/dark (L/D) under various monochromatic light-emitting diode (LED) lights: blue (λ = 465 nm), red (λ = 660 nm), green (λ = 520 nm), and fluorescent (full-spectrum) as a control he studies indicated that N. oculata grown under blue LED illumination had a high fat percentage of 63.3 % and a total dry weight of 0.988 ± 0.04g L−1. The potential N. oculata which cultivated under blue light generated the greatest amount of fatty acid methyl ester (FAME) at 81.1 %. It was also able to remove up to 94.2% of BOD, 89.2% of COD, and 94.8% of wastewater pollutants.