Adi, Rahmat Yanuar (2026) Pembuatan Biochar Berbahan Limbah Biogas dari PT. Energi Agro Nusantara (Enero). Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Increased biogas production also generates large amounts of waste that could potentially cause environmental problems if not properly managed. One alternative for utilizing biogas waste is to process it into biochar through pyrolysis, given that biogas waste from PT. Energi Agro Nusantara (Enero) contains cellulose, hemicellulose, and lignin, which have the potential to produce carbon-rich biochar. This study aims to produce biochar from biogas waste that meets Indonesian National Standard (SNI) 06-3730-1995 by examining the effects of pyrolysis time and initial feedstock weight on the moisture content, ash content, volatile matter content, and carbon content of the resulting biochar. The study was conducted using biogas slurry waste that was first dried at 105°C to constant weight with variations in weight of 250, 300, 350, 400, and 450 grams. The pyrolysis process was carried out using a furnace at a constant temperature of 400°C with varying durations of 30, 35, 40, 45, and 50 minutes. The resulting biochar was then analyzed for moisture and ash content using the gravimetric method, volatile matter content using the weight loss method, and fixed carbon content through fixed carbon calculations. The biochar with the highest carbon content was subsequently tested using XRD to determine its crystal structure and SEM to determine its surface morphology. The results of the study show that the moisture content and volatile matter content decrease as pyrolysis time increases but increase as the material weight increases, while the ash content increases as both pyrolysis time and material weight increase. The carbon content increased with increasing pyrolysis time but decreased with increasing feedstock weight. Optimal conditions were achieved at a pyrolysis time of 50 minutes with a feedstock weight of 250 grams, yielding a moisture content of 1.3%, an ash content of 2.725%, a volatile matter content of 39.2%, and a carbon content of 56.775%. XRD analysis results indicate that the biochar contains a crystalline phase of CaCO₃, while SEM results show a relatively dense surface structure with a fibrous texture. Although the moisture and ash contents met the requirements of SNI 06-3730-1995, the volatile matter and carbon contents did not meet these standards. Therefore, it is recommended that the resulting biochar not be used as a soil conditioner or adsorbent, and raw materials with higher cellulose content should be used for further research.
| 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: | Rahmat Yanuar Adi | ||||||||
| Date Deposited: | 01 Sep 2026 03:46 | ||||||||
| Last Modified: | 07 Sep 2026 08:21 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/59122 |
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