Abstract
Freshwater microalgae Chlorella sp. was isolated from the water body of Taman Gelora, Kuantan, Pahang. The isolated monoculture was cultured in different concentration of POME (10%, 20%, 30%, 40% and 50%, v/v) as substrate. The maximal growth and biomass productivity were found in 30% (v/v) of POME. The maximal dry biomass 1.56 g/L was obtained and extracted 39.1% lipid, approximating similar productivity as in conventional BG-11 medium 1.65 g/L of biomass and 41.5% lipid. Gas chromatography-mass spectrometry analysis shows the composition of fatty acids such as linolelaidic acid, oleic acid, palmitic acid, stearic acid, elaidic acid, and α-linoleic acid dominant. The highest fatty acid is linolelsidic acid (41.69%). POME has the potential to be used as a substrate for microalgae Chlorella sp. cultivation.
Highlights
Microalgae are primarily a diverse group of microorganisms consisting of prokaryotic cyanobacteria and eukaryotic photoautotrophic protists (Ramaraj et al, 2010; 2016a,b; Venkatesan et al, 2015)
The cultivation of microalgae in wastewater offers a low-cost tertiary treatment method, reduce the nutrient cost for cultivation and at the same time increases the production of microalgae biomass by supplying the nutrients and organic compounds required for the metabolism of microalgae (Hadiyanto and Nur, 2014)
The experiment result showed that Palm oil mill effluent (POME) could be used as a substrate for microalgae Chlorella sp. cultivation
Summary
Microalgae are primarily a diverse group of microorganisms consisting of prokaryotic cyanobacteria and eukaryotic photoautotrophic protists (known as blue-green algae) (Ramaraj et al, 2010; 2016a,b; Venkatesan et al, 2015). Microalgae can be a source of bioactive compounds in lipids, carbohydrates, protein, vitamins, glycerol, and carotenes (Khan et al, 2018; Ramaraj et al, 2013; 2014). Micro-algae's lipid productivity is higher than other terrestrial plants (Chia et al, 2013; Khalid et al, 2018; Ramaraj et al, 2014; 2015a,b,c). Microalgae can absorb nitrogen, phosphorus and carbon from wastewater, including adsorbing metals, and in many cases can be co-cultivated with various bacteria in municipal wastewater treatment plants (Zhang et al, 2014; Nwuche et al, 2014). The composition of POME contains high nutrients such as nitrogen and phosphorus, which are eventually useful for algae medium
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