Desain Pabrik Bioetanol Fuel Grade Berbasis Molase Dengan Teknologi Dehidrasi Molecular Sieve

Lamhotmatua, Thasya and Antonius, Kevin (2026) Desain Pabrik Bioetanol Fuel Grade Berbasis Molase Dengan Teknologi Dehidrasi Molecular Sieve. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tugas Akhir ini bertujuan untuk mendesain pabrik bioetanol berbasis molase dengan kapasitas 30.000 kL/tahun dan beroperasi secara kontinyu selama 24 jam/hari selama 330 hari/tahun. Bahan baku utama yang digunakan adalah molase, dengan bahan pendukung berupa air proses, asam sulfat, nutrien, antifoam, dan Saccharomyces cerevisiae. Pabrik ini dirancang untuk menghasilkan bioetanol fuel grade yang dapat dimanfaatkan sebagai bahan bakar alternatif maupun bahan campuran bahan bakar minyak, sehingga dapat mendukung pengurangan ketergantungan terhadap bahan bakar fosil. Molase dipilih sebagai bahan baku karena merupakan hasil samping industri gula yang masih mengandung gula cukup tinggi dan berpotensi untuk difermentasi menjadi etanol. Rangkaian proses produksi meliputi tahap pengenceran molase, sterilisasi, pendinginan, propagasi, fermentasi, pemisahan padatan menggunakan rotary vacuum drum filter, pemurnian melalui distilasi, serta proses dehidrasi menggunakan molecular sieve untuk memperoleh etanol fuel grade 99,6%. Berdasarkan hasil neraca massa, produk utama yang dihasilkan berupa bioetanol fuel grade, dengan produk samping berupa karbon dioksida, sisa biomassa ragi, dan limbah cair hasil proses. Bentuk perusahaan yang dipilih adalah Perseroan Terbatas (PT) dengan jumlah karyawan sebanyak 78 orang, baik karyawan shift maupun non-shift. Berdasarkan evaluasi ekonomi, diperoleh Pay Out Time (POT) sebesar 6,12 tahun dan Break Even Point (BEP) sebesar 52,01%.
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This final project aims to design a molasses-based bioethanol plant with a capacity of 30.000 kL/year and operates continuously for 24 hours/day for 330 days/year. The main raw material used is molasses, with supporting materials in the form of process water, sulfuric acid, nutrients, antifoam, and Saccharomyces cerevisiae. This plant is designed to produce fuel-grade bioethanol that can be used as an alternative fuel or a blend of fuel oil, thereby supporting the reduction of dependence on fossil fuels. Molasses was chosen as the raw material because it is a by-product of the sugar industry that still contains quite high sugar and has the potential to be fermented into ethanol. The series of production processes include the stages of molasses dilution, sterilization, cooling, propagation, fermentation, separation of solids using a rotary vacuum drum filter, purification through distillation, and a dehydration process using a molecular sieve to obtain fuel grade ethanol 99,6%. Based on the results of the mass balance, the main product produced is fuel-grade bioethanol, with by-products in the form of carbon dioxide, residual yeast biomass, and liquid waste from the process. The chosen company format is a Limited Liability Company (PT) with 78 employees, both shift and non-shift workers. Based on the economic evaluation, the Payout Time (POT) is 6,12 years and the Break Even Point (BEP) is 52,01%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bioetanol, Molase, Fermentasi, Molecular sieve, Fuel grade ethanol
Subjects:	T Technology > TP Chemical technology > TP155.5 Chemical plants--Design and construction T Technology > TP Chemical technology > TP339 Ethanol as fuel. Biomass energy.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24201-(S1) Undergraduate Thesis
Depositing User:	Kevin Antonius
Date Deposited:	31 Jul 2026 09:01
Last Modified:	31 Jul 2026 09:01
URI:	http://repository.its.ac.id/id/eprint/140317

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