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All Journal International Journal of Advances in Applied Sciences International Journal of Renewable Energy Development SPEKTRUM INDUSTRI Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Prosiding Semnastek IJEMS (Indonesian Journal of Environmental Management and Sustainability) Sains Natural: Journal of Biology and Chemistry Equilibrium Journal of Chemical Engineering PROSIDING SEMINAR NASIONAL PENELITIAN DAN PENGABDIAN KEPADA MASYARAKAT (SNPPM) UNIVERSITAS MUHAMMADIYAH METRO Prosiding Seminar Nasional dan Call Paper STIE Widya Wiwaha Indonesian Journal of Chemical Engineering Jurnal Teknologi dan Inovasi Industri
Martomo Setyawan
Universitas Ahmad Dahlan
Religion Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Public Health

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Journal : International Journal of Advances in Applied Sciences

 1 
Energy efficient direct transesterification of Nannochloropsis sp. using hydrodynamic cavitation Nirmalasari, Jiran; Setyawan, Martomo; Jamilatun, Siti; Pitoyo, Joko; Hakika, Dhias Cahya
International Journal of Advances in Applied Sciences Vol 14, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i2.pp394-405

Abstract

The increasingly limited supply of fossil fuels requires renewable fuel as an alternative source. Nannochloropsis sp. is a microalgae species containing a lipid content of between 12 and 53%, which can be converted to biofuel as an alternative source of fossil fuels through a transesterification process. Up to this date, the literature has reported no studies on biodiesel production from Nannochloropsis sp. via direct transesterification with catalyst using hydrodynamic cavitation. The direct transesterification process introduced 7.5 g of microalgae, 40 ml of methanol, 90 ml of hexane, and 0.0225 g of sodium hydroxide into the sample chamber. These mixtures were passed within the cavitation using a pressure driver and transformed into fatty acid methyl ester (FAME). The catalytic hydrodynamic cavitation method produces a higher extract yield than the stirring one. Regarding the FAME composition, the catalytic hydrodynamic cavitation method is dominated by saturated fatty acid (palmitic), while the stirring catalytic method is dominated by monounsaturated fatty acid (oleic). The hydrodynamic cavitation method provides a lower average degree of unsaturation and shorter chain length than the stirring catalytic method.
Double step method in lipid extraction from biomass Aurantiochytrium sp powder Sulistiawati, Endah; Suhendra, Suhendra; Setyawan, Martomo; Mahsunah, Anis Herliyati
International Journal of Advances in Applied Sciences Vol 12, No 4: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v12.i4.pp376-383

Abstract

Aurantiochytrium sp is a marine microalgae that is rich in lipids. Extraction of lipids from microalgae requires effort to select a suitable solvent and extraction method. This research used a double-step extraction method to study a mixture of n-hexane and methanol as a solvent. The variables studied were stirring time, the n-hexane to methanol (H/M) mixture ratio, and the solvent-to-biomass ratio (S/B). This research concluded that an optimum stirring time was 30 min, and a mixture of n-hexane and methanol solvents with a volume ratio of 1:1 is optimum. The optimum solvent-to-biomass ratio was S/B=20 mL/g dry microalgae. Under these conditions, the yield of oil was 83.88%. Double-step extraction can increase the yield by 10-40%.
Co-Authors Adi Permadi Arief Budiman Arief Budiman Desfitri , Erda Rahmilaila Dhias Cahya Hakika Dhias Cahya Hakika Dwi Astri Ayu Purnama Endah Sulistiawati Erna Astuti Evitasari, Rachma Tia Febriani, Annisa Vada Hanin, Nabila Hanum, Farrah Fadhillah Hapsauqi, Iqbal Ibdal Ibdal Ikhlasul Amal Ilham Mufandi Ilham Mufandi Jaka Kuncara Joko Pitoyo Kuncara, Jaka Lara Arilisa K Lara Arilisa K Lutfiatul Janah M. Idris Mahsunah, Anis Herliyati Mazareta, Selva Muhammad Kunta Biddinika Muhammad Nufail Syafii Mulyono, Sekar Larasati Nirmalasari, Jiran Nisya Silvani Sembiring Novia Rahmawati Othman, Mohamad Rizza Panut Mulyono Pradana, Yano Surya Prasakti, Laras Resyaldi Pratama Rifka Alfiyani Riska Utami Melani Putri Siti Jamilatun Siti Salamah Siti Salamah Soedjatmiko Suci Fazriyah N Suci Fazriyah N Suhendra Suhendra Suhendra Sutijan Totok Eka Suharto Ulandari, Rizki Wijayanti, Karima Anggita Zahrul Mufrodi, Zahrul