Widyaningtyas, Marwa Ardiyanti Safa (2026) Kombinasi Sistem Intermittent Moving Bed Biofilm Reactor dan Mikroalga dalam Pengolahan Limbah Cair Domestik. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Greywater from Rusunawa Gunung Anyar Surabaya is discharged directly into receiving water bodies without treatment, with COD of 548.70 mg/L, ammonia 58.8 mg/L, and phosphate 43 mg/L, all exceeding the effluent standard of Minister of Environment and Forestry Regulation No. 11 of 2025. This study aimed to analyze microalgae growth rates, biomass formation dynamics, removal efficiency of COD, ammonia (NH₃-N), and phosphate (PO₄), and to determine the most optimum combination of microalgae species and process time variation in the Intermittent Moving Bed Biofilm Reactor system. The study used Chlorella vulgaris and Nannochloropsis sp. with three oxic-anoxic-oxic process time variations: 4-1-3, 3-2-3, and 2-3-3 hours, along with a control reactor, using Kaldnes K5 media with a 20% filling ratio and 8-hour hydraulic retention time. The highest specific growth rates of Chlorella vulgaris and Nannochloropsis sp. in the attached phase were 0.0964 h⁻¹ and 0.0897 h⁻¹, respectively, both achieved under the longest oxic phase variation 4-1-3 hours. The highest MLVSS was obtained in Chlorella vulgaris reactor C2 at 1,680 mg/L, followed by Nannochloropsis sp. N2 at 1,570 mg/L, and control T2 at 1,130 mg/L. COD removal efficiency reached 74–76% (Chlorella vulgaris), 70–72% (Nannochloropsis sp.), and 60–63% (control), with lowest final COD of 129.28 mg/L in reactor C2. Ammonia removal peaked at 73.57% in reactor C1 with a final concentration of 15.54 mg/L, while the lowest was 33.71% in control T3. Phosphate removal was highest in reactor C1 at 73% with a final concentration of 11.634 mg/L, followed by N1 at 68% and control T1 at 43%. Although none of the treatments met the required effluent standards, the most optimum combination was Chlorella vulgaris at the 3-2-3 hours variation for COD removal and biomass formation, and the 4-1-3 hours variation for ammonia and phosphate removal. Keywords: Greywater, Intermittent MBBR, Microalgae, Nannochloropsis sp., Chlorella vulgaris, Ammonia, COD, Phosphate
| 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: | Marwa Ardiyanti Safa Widyaningtyas | ||||||||
| Date Deposited: | 21 Jul 2026 04:31 | ||||||||
| Last Modified: | 21 Jul 2026 07:16 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/56707 |
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