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All Journal Equilibrium Journal of Chemical Engineering
Endah Retno Dyartanti
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Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Materials Science & Nanotechnology

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Two Step and Direct Fermentation in the Production of Ethanol from Starch: A Short Review Endah Retno Dyartanti; Margono Margono; Anisa Raditya Nurohmah; Shofirul Sholikhatun Nisa; Novan Riantosa
Equilibrium Journal of Chemical Engineering Vol 4, No 1 (2020): Volume 4 No 1 July 2020
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v4i1.46130

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Abstract.  Ethanol as a renewable fuel has been widely produced in various countries. One source of raw material for producing ethanol is starch. The process of producing ethanol from starch needs to be pretreated so that starch molecules can split into smaller ones. However, this process requires pre-treatment which will expensive more than ethanol from sugar. There are two types of pretreatment i.e. two-step ethanol production and direct fermentation. There is two kind of hydrolysis, acid hydrolysis, and enzymatic hydrolysis. Two-step ethanol production is a conventional method that separates pretreatment and fermentation process, while direct fermentation is the direct production of starch into ethanol using recombinant yeast that co-produces enzymes such as amylose and glucoamylase. Two-step ethanol production has the advantage of high yield but needs high cost whereas, direct fermentation has the advantage of low-cost production but needs longer time. Common starch to ethanol production consists of two stages, namely hydrolysis of raw materials into glucose and fermentation into ethanol. Both of these processes can be run on average at temperatures of 30-80oC with a pH range of 4-6 and varying time intervals. The enzyme used depends on the source of the starch, but the most commonly used is Saccharomyces cerevisiae.Keywords: Ethanol, starch, pre-treatment
Peningkatan Kompetensi Siswa SMK Muhammadiyah 4 Surakarta mengenai Industri Baterai Lithium Ion Tika Paramitha; Endah Retno Dyartanti; Arif Jumari; Agus Purwanto; Adrian Nur; Anatta Wahyu Budiman
Equilibrium Journal of Chemical Engineering Vol 6, No 2 (2022): Volume 6, No 2 December 2022
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v6i2.66334

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ABSTRAK. Sekolah Menengah Kejuruan (SMK) Muhammadiyah 4 Surakarta memiliki jurusan Kimia Industri yang mempersiapkan tenaga terampil di industri kimia untuk mendukung dalam pengembangan teknologi. Salah satu Industri Kimia yang berkembang saat ini adalah Industri Baterai Lithium Ion (LIB). LIB saat ini digunakan tidak hanya pada perangkat elektronik portabel, seperti komputer dan telepon seluler, tetapi juga untuk kendaraan listrik atau kendaraan hybrid. Oleh karena itu, lulusan SMK dengan Program Keahlian Kimia Industri hendaknya menyiapkan lulusan yang mempunyai kompetensi di bidang teknologi baterai. Dengan kompetensi dosen dalam teknologi produksi material aktif baterai pada skala mini plant dan fasilitas yang mewadai di Pusat Unggulan IPTEK (PUI) PT Teknologi Penyimpanan Energi Listrik, maka sangat memungkinkan dosen untuk mengenalkannya kepada siswa SMK Muhammadiyah 4 Surakarta. Metode yang dilakukan dalam pelatihan ini adalah metode ceramah, diskusi dan praktik. Adapun materi yang disampaikan mengenai baterai lithium ion (aplikasi, jenis, tipe, struktur, proses pembuatan material aktif, dan fabrikasi). Kegiatan praktik yang dilakukan yaitu praktik pembuatan material aktif katoda dengan metode ko-presipitasi dan fabrikasi sel baterai. Hasil kegiatan ini adalah kompetensi siswa dan guru meningkat yang ditunjukkan dengan nilai Pre-Test yang lebih baik dibandingkan dengan Post-Test.Kata kunci: Baterai Lithium Ion, SMK, KatodaABSTRACT. Muhammadiyah 4 Surakarta Vocational High School has a Department of Industrial Chemistry which prepares skilled workers in the chemical industry to support the development of technology. One of the chemical industries that is currently developing is the Lithium Ion Battery (LIB) industry. LIBs are currently used not only in portable electronic devices, such as computers and cell phones but also for electric vehicles or hybrid vehicles. Therefore, Vocational High School with an industrial chemistry expertise program should prepare students who graduate to have competence in the field of battery technology. With the competence of lecturers in the production technology of battery active materials on a mini plant scale and adequate facilities at the Center of Excellence for Electrical Energy Storage Technology, it is very possible for lecturers to introduce technology and battery production facilities to students of Muhammadiyah 4 Surakarta Vocational High School. The methods used in this training are lecture, discussion and practice methods. The material presented was about LIB (application, type, type, structure, active material manufacturing process, and fabrication). The practical activities carried out are the practice of making cathode active materials with the co-precipitation method and battery cell fabrication. The result of this activity is that the competence of students and teachers increases as indicated by a better Pre-Test score compared to the Post-Test score.Keywords: Lithium Ion, SMK, Cathode
Co-Authors Adrian Nur Agus Purwanto Anatta Wahyu Budiman Anisa Raditya Nurohmah Arif Jumari Margono Margono Novan Riantosa Shofirul Sholikhatun Nisa Tika Paramitha