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All Journal Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Indonesian Journal of Biotechnology Makara Journal of Technology
Lischer, Kenny
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Indonesia, Depok 16424, West Java, Indonesia; Research Center Of Biomedical Engineering, Universitas Indonesia, Depok 16424, West Java, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health

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Journal : Makara Journal of Technology

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Purification Simulation With Vapor Permeation and Distillation-Adsorption In Bioethanol Plant Gozan, Misri; Setiawan, Mia Sari; Lischer, Kenny
Makara Journal of Technology Vol. 21, No. 1
Publisher : UI Scholars Hub

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High purity of Bioethanol is required in biofuel mixing with gasoline (EXX). In bioethanol production line, the azeotropic property of ethanol-water becomes the barrier for purification process. This study examined two bioethanol separation processes by support of simulation tools, Superpro Designer 9.0 software. Ethanol purity and a low costeconomical process were the major considerations. Purification method of vapor permeation membrane technology was compared with distillation-adsorption method. Data from previous lab experiments and some literatures were used. The results showed that distillation-adsorption method is more economical compared to vapor permeation technology. Payback period of the simulation is 3.9 years and 4.3 years to distillation adsorption and vapor permeation respectively with each IRR value is 20.23% and 17.89%. Initial investment value of vapor permeation is 9.6% higher than distillation method. Significant difference observed in operating costs, since more units involved in vapor permeation require more labors to operate.
Identification of Thermophilic Bacteria from Tirta Lebak Buana Hot Spring in Serang, Banten, Indonesia Lischer, Kenny
Makara Journal of Technology Vol. 25, No. 3
Publisher : UI Scholars Hub

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Since Taq polymerase was first explored and identified from thermophilic bacteria, these bacteria have become well-known sources of thermostable enzymes. New thermophilic bacteria have been investigated to broaden biodiversity and translation research. Studies have shown interests in Indonesia because of thermophilic bacteria found in hot springs. This country is traversed by the ring of fire and has more than 70 volcanoes, resulting in the wide distribution of hot springs across the country. Although many reports have been performed, studies have yet to explore thermophilic bacteria in Tirta Lebak Buana hot springs, Java Island, Indonesia. This research was the first to examine thermophilic bacteria in Tirta Lebak Buana hot spring. Two samples from two different sampling sites were obtained and analyzed through 16srRNA analysis (sampling sites A and B). Measurements indicated that the temperature (50 °C) in sampling site A was higher than that in sampling site B (40 °C), but they had similar pH (7.0). Polymerase chain reaction (PCR) showed that the 16srRNA of the specimen was around 1465 bp. The analysis of the 16srRNA sequence revealed that the obtained bacteria have a similar sequence and close relationship with Bacillus subtilis subsp. stercoris strain N12.
Co-Authors Adella Josephin Adra Amalia Nur Ahlina Deti Purwanti Dwiranti, Astari Irfan Martiansyah Izza, Nadira Nurul Khayrani, Apriliana Cahya Laksono, Auzan Luthfi Misri Gozan Muhammad Imam Surya Nadhifa Tazkia Ramadhani Nidaan Khafian Nurhayati, Retno Wahyu Putrika, Afiatry Ratna Yuniati SAHLAN, MUHAMAD Setiawan, Mia Sari Siti Fauziyah Rahman Sri Rahayu, Amy Yayuk Uda Hashim Wiguna Rahman Yudan Whulanza