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All Journal Reaktor TEKNIK METANA Seminar Nasional Teknik Kimia Kejuangan Majalah Ilmiah MOMENTUM Jurnal Rekayasa Mesin SASI
Hargono Hargono
Jurusan Teknik Kimia, Fakultas Teknik, Fakultas Teknik Universitas Diponegoro
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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Journal : TEKNIK

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RANCANG BANGUN ALAT DISTILASI PEMURNIAN BIOETANOL GRADE TEKNIS BERSKALA UKM : KAJIAN KINERJA ALAT TENTANG DERAJAD PEMURNIANNYA Hargono, Hargono; Samodra, Nugraha Bayu; Firdausi, Nadia Zahrotul; Nugraheni, Agnes Kinanthi; Zakaria, Lazuardy R.
TEKNIK Volume 34, Nomor 3, Tahun 2013
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (383.096 KB) | DOI: 10.14710/teknik.v34i3.6491

Abstract

The technical grade bioethanol can be manufactured by using distillation process at small and medium enterprises. In this research, bioethanol was made from fermentation of  rubber cassava starch (Manihot glaziovii) and gadung starch (Dioscorea hispida). From this fermentation process, 3-8% crude ethanol was produced. To achieve the objective 2-stage distillation units were designed to purify the crude ethanol product. Bioethanol produced from 1st and 2nd distillation units were of 35 and 94% purity respectively corresponding to the technical specifications desired. The design of 2-stage distillation units has been completed, included the shape and dimensions of the units, i.e. the main condenser, cylindrical in shaped, dimensions of diameter was 32cm and height was 45cm, cylindrical in shape  feeder tank/boiler, small scale volume of 5L, which can be scaled up to 65L. At 2nd distillation column, the diameter was 9cm and length was 121cm. The column was isolated using ori type bamboo filled with glasswool as isolator. The columns were filled with ceramic or glass type packing inside. The columns were equipped with thermometer to measure the temperature of ethanol-water vapor. Key words: crude bioethanol, design of 2-stage distillation, technical grade bioethanol
Analisis Penambahan Ion Na dan Ca pada Hidrolisis Pati Singkong (Manihot esculanta) untuk Meningkatkan Aktivitas Enzim: Studi Kinetika Hidrolisis Hargono, Hargono; Jos, Bakti; Satriadi, Hantoro; Zakaria, Muhammad Fahmi
TEKNIK Vol. 43, No. 1 (2022): May 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i1.41985

Abstract

Sweet cassava is tuber that contains large amount of starch so that it can produce reducing sugars. The addition of metal ions can increase enzyme activity. The purpose was to study the addition of Na and Ca ions on reducing sugars concentration and to study the hydrolysis kinetics. Experiments were carried out at various concentrations of substrates (100, 200, and 300 g/L), enzyme concentrations (1 and 1.5% (w/w)), addition of Na and Ca ions of 60 ppm. The hydrolysis method was conducted at temperature of 30°C with the enzyme StargenTM 002 at pH 4, for 24 hours. The results showed that starch concentrations of 100-200 g/L were able to significantly increase the reducing sugars at enzyme concentration of 1.5% (w/w). The addition of Ca ions increased the concentration of reducing sugar by 64% while the addition of Na ions increased it by 18.9%. The best reducing sugar concentration (68.79 g/L) was obtained at starch concentration of 200 g/L and enzyme concentration of 1.5% (w/w) with the of Ca ions. Kinetic studies show that phenomenon follows Michaelis-Menten equation with Vmax valued of 6.053; 8,881; 15.106 g/L.hour, respectively. So that, addition of Na and Ca ion can increase the enzyme activity
Co-Authors Adimas Wahyu Santoso Adina, Alifia Rizki Adristy, Vania Zulfa Agnes Kinanthi Nugraheni Ahmad Rustan Alba, La Ode Aprilina Purbasari Bakti Jos C. S. Budiyati Fachmi Jambak Fitra Pradhita Gleys Kasih Deborah Hantoro Satriadi Harles, Hendra K. Haryani Kristinah Haryani Lazuardy R. Zakaria Luqman Buchori M. Djaeni Margaretha Praba Aulia Nadia Zahrotul Firdausi Nita Aryanti Noer Abyor Handayani Nugraha Bayu Samodra Putri, Sheila Amanda Rahman, Rofi Aulia Yuliani, Sari Zakaria, Muhammad Fahmi