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Dwi Susilaningsih
Research Center for Biotechnology, Indonesian Institute of Sciences
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Materials Science & Nanotechnology Medicine & Pharmacology

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Outdoor Closed System of Algal Mass Culture : In Sight of Comparison on Vertical and Horizontal Photobioreactor for Cultivating the Spirulina sp. Hilda Farida; Puspita Sari Harahap; Rifana Sobari; Rudyanto Gunawan; Delicia Yunita Rahman; Dwi Susilaningsih
Reaktor Volume 19 No. 2 June 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.913 KB) | DOI: 10.14710/reaktor.19.2.54-61

Abstract

Spirulina are multiceluller and filamentous blue-green algae that has gained considerable popularity in the health food industry and increasingly as a protein and vitamin supplement to aquaculture diets. The challenge for economically and fulfill the requirement for food and medical purposes has create many ways for mass-growth production, that possibly cultivated in the open-system (such as a raceway pond) or closed-system photobioreactors (such as tubular, bubble-column, airlift, flat-panel, and vertical). the cultivation of teh Spirulina on the vertical and horizontal photobioreactor has been studied. The photobioreactor, namely BJVP and BJHP, has a design to be less energy consumption using the air bubbling or circular paddle. The observation was conducted in a whole year with parameters of rainfall, temperature, light intensity, pH, and salinity. Result  showed that cultivation of Spirulina on the vertical photobioreactor growth faster than teh horizontal photobioreactor systems and the yield of biomass was about 0.94 gDW/L. Average of temperature ranges of BJHP were 31.0C-35.5C, salinities were 35 per mil level, pH were 8.55-10.86, and light intensity were 427-2001 umol photon s-1m-2. Whereas the BJVP has averages temperature range of 31.4C-33.9C, salinity 33-35 per mil level, pH 8.46-10.75, and light intensity 532-2062 umol photon s-1m-2. The proximate analyses of biomass from BJVP cultivation shows has tendency higher protein content compared to BJHP. The optimization of both reactors has continuing evaluated in order to get the optimum parameters required for economically Spirulina cultivation systems.Keywords: Spirulina, BJVP, BJHP, outdoor mass cultivating system, photobioreactor.
Influence of Light Intensity on Lipid Productivity and Fatty Acids Profile of Choricystis sp. LBB13-AL045 for Biodiesel Production Swastika Praharyawan; Delicia Yunita Rahman; Dwi Susilaningsih
Research Journal of Life Science Vol 5, No 2 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (380.5 KB) | DOI: 10.21776/ub.rjls.2018.005.02.7

Abstract

The influence of various light intensity on the lipid productivity, fatty acids profile, and biodiesel properties of Choricystis sp. AL045 were examined. Choricystis sp. LBB13-AL045 was a high lipid content microalgal strain (up to 42.49 ± 0.41% per dry weight basis) with great performance of its growth (specific growth rate and biomass productivity were up to 0.802 ± 0.013 day-1 and 108.57 ± 8.07 mg L-1 day-1, respectively). Such results indicated its high lipid productivity and its potency to be used for biodiesel production. The treatment of various light intensities on the microalgal culture resulted obvious differences in lipid productivity and fatty acids composition. Maximum lipid productivity (46.13 ± 3.43 mg L-1 day-1) was at 405 µmol m-2 s-1 of light intensity. The fatty acids profiles of four light intensities treatments were quite similar; the major components of fatty acid obtained from Choricystis sp. LBB13-AL045 oil were oleic acid (C18:1) and palmitic acid (C16:0), which provided a strong indication of high-quality biodiesel. Biodiesel properties were determined by empirical equations and found to be within the limits of biodiesel standard SNI 7182:2015, ASTMD6751-08 and EN14214.
Co-Authors Delicia Yunita Rahman Hilda Farida Puspita Sari Harahap Rifana Sobari Rudyanto Gunawan Swastika Praharyawan