Marwan Hamid, Mochamad (2025) PENGARUH VARIASI WAKTU HIDROLISIS TERHADAP PRODUKSI BIOETANOL DARI ECENG GONDOK (EICHHORNIA CRASSIPES) SEBAGAI BAHAN BAKAR ALTERNATIF. S1 thesis, FAKULTAS TEKNIK UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
This study aims to examine the effect of hydrolysis time variation on bioethanol production from water hyacinth (Eichhornia crassipes) and its potential as an alternative fuel for Otto engines. Water hyacinth was chosen for its high cellulose content and abundance. The process included material preparation (drying and grinding), delignification with NaOH, hydrolysis using 2% H₂SO₄ at 90 °C for 40, 50, and 60 minutes, followed by neutralization, fermentation with Saccharomyces cerevisiae, and ethanol analysis using High Performance Liquid Chromatography (HPLC) at BRIN. Results showed ethanol content increased with hydrolysis time: 405 ppm (40 min), 432 ppm (50 min), and 696 ppm (60 min). This indicates that longer hydrolysis produced more glucose, later fermented into ethanol. Based on calculations, to produce 1 liter of pure bioethanol, approximately 51 g of dry matter, or 732,76 kg of fresh water hyacinth, is required at the optimal hydrolysis time of 60 minutes. This indicates that, despite the low ethanol content, water hyacinth has potential as a bioethanol feedstock. With process optimization and further purification, bioethanol from water hyacinth has the potential to be used as a blended fuel (gasohol) in Otto engines.
| Item Type: | Thesis (S1) | ||||||
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| Additional Information: | Penelitian ini bertujuan untuk mengetahui pengaruh variasi waktu hidrolisis terhadap produksi bioetanol dari eceng gondok (Eichhornia crassipes) serta mengkaji potensinya sebagai bahan bakar alternatif mesin Otto. Eceng gondok dipilih karena kandungan selulosanya tinggi dan ketersediaannya melimpah. Proses penelitian meliputi persiapan bahan (pengeringan dan penghalusan), delignifikasi dengan NaOH, hidrolisis menggunakan H₂SO₄ 2% dengan variasi waktu 40, 50, dan 60 menit pada suhu 90 °C, dilanjutkan netralisasi, fermentasi dengan Saccharomyces cerevisiae, serta uji kadar etanol menggunakan High Performance Liquid Chromatography (HPLC) di BRIN. Hasil penelitian menunjukkan kadar etanol meningkat seiring waktu hidrolisis yaitu 405 ppm (40 menit), 432 ppm (50 menit), dan 696 ppm (60 menit). Artinya, semakin lama hidrolisis, semakin banyak selulosa terurai menjadi glukosa dan difermentasi menjadi etanol. Berdasarkan hasil perhitungan, untuk menghasilkan 1 liter bioetanol murni dibutuhkan sekitar 51 g bahan kering atau 732,76 kg eceng gondok segar pada waktu hidrolisis terbaik yaitu 60 menit. Hal ini menunjukkan bahwa meskipun kadar etanol yang dihasilkan masih rendah, eceng gondok memiliki potensi sebagai bahan baku bieotanol. Dengan optimasi proses dan pemurnian lanjutan, bioetanol dari eceng gondok berpeluang digunakan sebagai bahan bakar campuran (gasohol) pada mesin otto. | ||||||
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology |
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| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 21201-Jurusan Teknik Mesin |
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| Depositing User: | Mochamad Marwan Hamid | ||||||
| Date Deposited: | 30 Oct 2025 09:18 | ||||||
| Last Modified: | 30 Oct 2025 09:18 | ||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/55644 |
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