Wirayudha, Umar (2025) OPTIMASI HIDROLISIS LIMBAH KULIT BUAH GAYAM MENGGUNAKAN METODE ASAM MENJADI GULA PEREDUKSI. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Gayam fruit peel (Inocarpus fagifer), an organic waste with a cellulose content of 35.24%, has the potential to be used as a raw material for bioethanol through conversion to glucose. This study optimized the acid hydrolysis process using HCl using the Response Surface Methodology (RSM) method. The initial delignification stage with 8% NaOH at 80°C for 60 minutes reduced lignin from 12.36% to 4.603% and increased cellulose to 37.536%. Hydrolysis with varying HCl concentrations (1–5 N) and times (90–210 minutes) produced the highest glucose content of 25.3% at 5 N and 150 minutes. RSM optimization showed optimum conditions at 5 N HCl concentrations and 156.67 minutes, with a predicted glucose yield of 24.3668% and an actual yield of 4.7217% (47217 ppm). Increasing time and concentration increased glucose to the optimum, but decreased due to degradation to 5-HMF and formic acid. An R² value of 99.65% indicates a good fit for the model's prediction results.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Umar Wirayudha ㅤ | ||||||||
| Date Deposited: | 15 Sep 2025 01:28 | ||||||||
| Last Modified: | 15 Sep 2025 01:28 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/42912 |
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