Pamungkas, Kresna Setyawan Adhi (2025) Regenerasi Kinerja Membran Ultrafiltrasi PVDF dengan Pencucian Bertahap (Asam Sitrat dan H2O2) dalam Menurunkan Kekeruhan, TDS, dan Total Coliform. Undergraduate thesis, Universitas Pembangunan Nasional "Veteran" Jawa Timur.
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Abstract
This study evaluated the regeneration of PVDF ultrafiltration membranes for reducing turbidity, TDS, and total coliform in Jagir River water, and the effectiveness of stepwise cleaning with citric acid (C6H8O7) and hydrogen peroxide (H2O2). Filtration was conducted at operating pressures of 1, 1.5, and 2 bar, with cleaning solution concentrations of 0, 2, 4, and 6 wt% in a dead-end system. Membrane performance was evaluated through permeate flux and Flux Recovery Ratio (FRR), while water quality was analyzed for raw water, permeate before cleaning, and permeate after cleaning, focusing on turbidity, TDS, and total coliform. Results showed that PVDF membranes significantly reduced turbidity (>95%) and total coliform (>99.99%), while TDS removal remained limited due to its small molecular size relative to membrane pores. Flux declined during filtration due to fouling, with a faster decrease at higher pressures. The best result was obtained at 2 bar, where flux dropped from 2237.374 L/m²·h to 431.282 L/m²·h. Chemical cleaning increased FRR, with the highest recovery of 69.72% at 2 bar and 6 wt%, while lower pressures and concentrations produced limited recovery. Higher FRR values corresponded to improved reduction of turbidity, TDS, and total coliform, indicating that membrane regeneration maintained filtration performance. Citric acid removed inorganic fouling through metal ion chelation, while H2O2 oxidized organic fouling and biofilm, producing a synergistic effect. Although irreversible fouling prevented full recovery, chemical cleaning effectively restored membrane performance and maintained pollutant removal efficiency in the Jagir River ultrafiltration system. Keywords: PVDF, ultrafiltration, fouling, chemical cleaning, citric acid, hydrogen peroxide, Jagir River.
| 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: | Kresna Setyawan | ||||||||
| Date Deposited: | 03 Dec 2025 04:32 | ||||||||
| Last Modified: | 03 Dec 2025 08:40 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/47476 |
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