Wasiatul Maghfiroh, Erdawati, Ganjar Saefurahman, Syarif Hidayatuloh, Mujizat Kawaroe
Chlorella sp. is microalgae species that is commonly found in seawater. Chlorella biomass have been produced worldwide and considered as sources for commercial high value bioproducts and biofuels for the last few decades. However, its microscopic size and negatively charged cell surface causes the difficulties of harvesting process or separation of its biomass from the culture medium. The common techniques for harvesting microalgae biomass are centrifugation, filtration, and flocculation. The determination of efficient harvesting methods was the background of this study to lower the cost of harvesting. In this study, the flocculation harvesting method was used by applying several flocculant doses of moringa seeds extract (Moringa oleifera) and adjusted pH. Moringa seed was used as a flocculant to reduce the use of synthetic flocculant materials, especially metals, in order to achieve an environmentally friendly, more efficient, and safe biomass harvesting method for uses as aquaculture feed. The results showed that the moringa seeds are considered efficient for use as flocculants of Chlorella biomass. This flocculant achieved the optimum performance in the treatment of pH 11 with a dose of 0.15 grams moringa seeds flocculant in 1 Liter of Chlorella sp. culture. © 2018 Published under licence by IOP Publishing Ltd.
Department of Chemistry, Faculty of Mathematics and Sciences, Jakarta State University, Jl. Pemuda No.10, Rawamangun, Jakarta, 13220, Indonesia; Surfactant and Bioenergy Research Center, Bogor Agricultural University, Baranangsiang Campus, Jl. Raya Pajajaran No. 1, Bogor, 16143, Indonesia; Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Dramaga Campus, Bogor, Indonesia
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