Maharani, Cahya Nova Putri (2025) Perilaku Hidrodinamika pada Tangki Berpengaduk dengan Variasi Desain Impeller dalam Proses Koagulasi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Water pollution caused by the discharge of domestic wastewater represents a significant environmental issue in Indonesia. Approximately 60% of rivers are reported to suffer from severe pollution, with Total Suspended Solids (TSS) and turbidity frequently exceeding established quality standards. One commonly applied treatment method for reducing TSS and turbidity is the coagulation–flocculation process, whose effectiveness is strongly influenced by hydrodynamic mixing conditions. This study aims to analyze the effects of baffle configuration, impeller type, and impeller clearance from the tank bottom on flow patterns and their relationship to floc formation. The investigated variables include baffle conditions (with and without baffles), impeller types (flat paddle with 2 blades, flat paddle with 2 tiered blades, turbine with 4 flat blades, turbine with 4 flat blades equipped with a vaned disc, and propeller with 3 blades), as well as impeller clearances of 1.8 cm, 2.4 cm, and 3.0 cm. The observed parameters include flow patterns, temperature, pH, floc size distribution, and the removal efficiencies of TSS and turbidity. The findings indicate that mixing design has a significant influence on hydrodynamic behavior and the quality of the flocs formed. In small-scale tanks, the presence of baffles can lead to floc breakage, whereas tanks without baffles promote more stable floc growth. The optimal configuration was achieved using a turbine impeller with four flat blades, equipped with a vaned disc, positioned 3.0 cm above the tank bottom and operated without baffles. This mixing design produced stable flow patterns and achieved TSS removal efficiency of 91.67% and turbidity removal efficiency of 83.27%.
| 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: | Cahya Nova Putri Maharani | ||||||||
| Date Deposited: | 04 Dec 2025 03:13 | ||||||||
| Last Modified: | 04 Dec 2025 06:31 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/47354 |
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