Biodiesel production by microalgae Nannochloropsis sp. grown in palm oil mill effluent

Abstract

A marine microalga, Nannochloropsis sp., was discovered in a water body in Teluk Cempedak, Kuantan, Pahang. In Nannochloropsis sp., for biomass and lipid synthesis, POME was used as a substitute medium. The isolated monoculture was grown in various concentrations of POME (5%, 10%, 15%, and 20%), as well as a standard control medium. Nannochloropsis sp. showed greater cell growth at 10% POME, with a maximum dry biomass of 1.504 g L-1 and extracted 35.9% lipid after 14 days of flask cultivation. Fatty acids namely oleic acid, linoleic acid, palmitic acid, and stearic acid were shown to be prominent in GC-MS analysis. The fatty acid oleic acid has been discovered to be the most abundant (73.40%). POME has the prospective to be used as a growth media for the cultivation of microalgae Nannochloropsis sp.

Impact of biomass density on growth rates of Spirulina platensis under different light spectra

“…At lower density, maximum amount of light can be absorbed whereas high density causes limited amount of light can be penetrated the culture and absorbed by the cells. In this situation, different light spectra can be applied to the culture (Palanisamy et al, 2020) Different microalgae species using different spectrum of lights to synthesis their own cellular metabolite compounds (Kanagesan et al, 2021). Among light spectra, white light can work for all species, whereas red and blue can be highly absorbed by all microalgae and tend to produce rapid growth rates.…”