Wijayanti, Sri Utami Bina (2026) Pengolahan Limbah Cair Tempe Menggunakan Sistem Bertahap ABR-MFCs Dan Aerasi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Tempe industrial wastewater contains high organic matter, potentially polluting the environment if disposed of without treatment. On the other hand, this organic content can be utilized as a source of electrical energy through Microbial Fuel Cells (MFCs) technology. This study aims to analyze the efficiency of COD and TSS removal parameters in tempe wastewater using a stepwise Anaerobic Baffle Reactor (ABR)-MFCs and aeration system, as well as to analyze the effect of the type of salt solution on the salt bridge and the type of cathode on the resulting electrical power density. The variations of salt solutions used were NaCl, KCl, and KNO3, while the variations of cathodes used were copper (Cu) and aluminum (Al) with graphite carbon as the anode. The study was conducted using a laboratory-scale reactor with an ABR residence time of 120 hours and aeration for 3 hours. The parameters analyzed included COD, TSS, pH, temperature, voltage, current, and electrical power density. The results showed that the ABR-MFCs and aeration system were able to reduce the COD and TSS levels of tempeh liquid waste with a total COD removal efficiency of 94.57%–97.83% and TSS of 45.45%–76.36%. The best variation was obtained in the combination of KNO3 salt bridge and C/Cu electrode with a COD removal efficiency of 97.83% and TSS of 76.36%, while the lowest efficiency was obtained in the combination of KCl–C/Al with a COD removal of 94.57% and TSS of 45.45%. The system was also able to produce an electrical power density of 23.12–167.2 mW/m², with the highest power density produced in the KCl–C/Cu variation of 167.2 mW/m². The results showed that variations in the type of salt solution in the salt bridge and the type of cathode affected the amount of electrical power density produced. This combination of treatment systems has the potential to be an alternative technology for processing tempeh liquid waste that is environmentally friendly and produces renewable energy.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TD Environmental technology. Sanitary engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Environmental Engineering | ||||||||
| Depositing User: | Sri Utami Bina Wijayanti | ||||||||
| Date Deposited: | 29 May 2026 09:04 | ||||||||
| Last Modified: | 29 May 2026 09:04 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/53267 |
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