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Synthesis of Avocado Seeds Into Biodiesel Using A Catalyst CaO From Blood Cockle Shell Suprihatin; Alif Julian; Muhammad Fikri
Advance Sustainable Science Engineering and Technology Vol. 6 No. 4 (2024): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i4.779

Abstract

Biodiesel is an environmentally friendly fuel made from oil vegetables that contain triglycerides. Biodiesel from avocado seed vegetable oil in Indonesian agricultural areas which according to BPS 2022 data, Indonesia produces 183,000 tons of avocados per year. This research aims to gained the effect of adding reaction temperature and Oil : Methanol ratio influence on biodiesel production. The avocado seed oil obtained by soxhlet extraction method, where 50 gram avocado seeds powder extracted with n-hexane solvent in 1 hour extraction time and 60℃ temperature giving result 10% yield of avocado seed oil . The CaO catalyst are obtained from Calcination procees of blood cockle shells in 900℃ temperature and 4 hours calcination time giving 98.82% CaO Cotent. The biodiesel is produces with 97% methanol reactant and 98.82% CaO catalyst in various methanol volume (30; 40; 50; 60; and 70 ml) and under different temperature conditions (30; 40, 50, 60, and 70 ℃). The best result of transesterification process biodiesel is obtained in 50℃ and 40ml methanol gets biodiesel yield of 96%, methyl ester content of 99.83%,  density of 865 gr/cm3, viscosity of 2.5 cSt  , mgKOH/gr acid number of 0.56 of, and heating value of 9871.6 kcal/kg. Based on the high result of methyl ester content and heating value of biodiesel obtained from the procees, the avocado seed oil biodiesel potentially used as an sustainable energy.
Synthesis of Avocado Seeds Into Biodiesel Using A Catalyst CaO From Blood Cockle Shell Suprihatin; Alif Julian; Muhammad Fikri
Advance Sustainable Science Engineering and Technology Vol. 6 No. 4 (2024): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i4.779

Abstract

Biodiesel is an environmentally friendly fuel made from oil vegetables that contain triglycerides. Biodiesel from avocado seed vegetable oil in Indonesian agricultural areas which according to BPS 2022 data, Indonesia produces 183,000 tons of avocados per year. This research aims to gained the effect of adding reaction temperature and Oil : Methanol ratio influence on biodiesel production. The avocado seed oil obtained by soxhlet extraction method, where 50 gram avocado seeds powder extracted with n-hexane solvent in 1 hour extraction time and 60℃ temperature giving result 10% yield of avocado seed oil . The CaO catalyst are obtained from Calcination procees of blood cockle shells in 900℃ temperature and 4 hours calcination time giving 98.82% CaO Cotent. The biodiesel is produces with 97% methanol reactant and 98.82% CaO catalyst in various methanol volume (30; 40; 50; 60; and 70 ml) and under different temperature conditions (30; 40, 50, 60, and 70 ℃). The best result of transesterification process biodiesel is obtained in 50℃ and 40ml methanol gets biodiesel yield of 96%, methyl ester content of 99.83%,  density of 865 gr/cm3, viscosity of 2.5 cSt  , mgKOH/gr acid number of 0.56 of, and heating value of 9871.6 kcal/kg. Based on the high result of methyl ester content and heating value of biodiesel obtained from the procees, the avocado seed oil biodiesel potentially used as an sustainable energy.
Pembuatan Tepung Biji Mangga (Mangifera indica L.) dengan Metode Blanching dan Penambahan Asam Askorbat Cipta Tungga Hayu Nirmala; Safira Cecilia Z; Nurul Widji Triana; Suprihatin
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v8i2.41438

Abstract

Biji mangga memiliki kandungan protein (7,5 – 13%), karbohidrat (69,2 - 80%), kalsium (0,21%), abu (2,2 –2,6%), fosfor (0,22%) dan serat (2,0 – 4,6%). Oleh karena itu, biji mangga dapat diolah menjadi bahan pangan yang potensial. Tujuan penelitian yaitu membuat tepung biji mangga, mengetahui pengaruh waktu blanching serta konsentrasi asam askorbat terhadap kandungan karbohidrat, lemak, protein, kadar air dan sensori tepung biji mangga. Pembuatan tepung biji mangga melalui tahapan diantaranya pengupasan kulit, pencucian biji, pemotongan tebal 0,5 cm, penimbangan, blanching 85℃ selama (0; 2,5; 5; 7,5; 10) menit, perendaman 30 menit dengan Na-metabisulfit 0,2%, perendaman dengan 20 menit dengan asam askorbat (0; 0,5; 1; 1,5; 2)%, pengeringan (80℃, 4 jam), penghalusan, pengayakan 80 mesh. Hasil penelitian menunjukkan semakin lama waktu blanching, kadar karbohidrat, protein dan air tepung biji mangga semakin meningkat, sedangkan kadar lemak semakin menurun. Konsentrasi asam askorbat semakin tinggi juga meningkatkan kadar karbohidrat, dan protein tepung, namun menurunkan kadar air dan lemaknya. Perlakuan blanching dan perendaman asam askorbat pada biji mangga berpengaruh nyata terhadap warna tepung (p<0,05), namun berpengaruh tidak nyata pada aroma dan tekstur tepung (p>0,05). Mango seeds contais protein (7.5 - 13%), carbohydrate (69.2 - 80%), calcium (0.21%), ash (2.2 -2.6%), phosphorus (0.22%) and fiber (2.0 - 4.6%). Mango seeds can be processed into potential food. The objectives of the study were to make mango seed flour, determine the effect of blanching time and ascorbic acid concentration on the content of carbohydrates, fat, protein, water content, and sensory of mango seed flour. Steps to make mango seed flour including peeling and washing the seeds, cutting 0.5 cm thick, weighing, blanching at 85℃ for (0; 2.5; 5; 7.5; 10) minutes, 30 minutes soaking with Na-metabisulfite 0.2%, immersion with 20 min with ascorbic acid (0; 0.5; 1; 1.5; 2)%, drying (80℃, 4 hours), pulverization, 80 mesh sieving. Research result showed that the longer the blanching time, carbohydrate, protein and water content of mango seed flour increases, while the fat content decreases. The higher ascorbic acid concentration also increased the carbohydrate and protein content of flour, but decreased the water and fat content. Blanching treatment and ascorbic acid soaking treatment on mango seeds had a significant effect (p<0,05) on the color of the flour, but did not significantly affect the aroma and texture of flour(p>0,05).