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- Title
Experimental Evaluation of Tubular Flocculator Implemented in the Field for Drinking Water Supply: Application in the Developing World.
- Authors
García-Ávila, Fernando; Méndez-Heredia, Angel; Trelles-Agurto, Alex; Sánchez-Cordero, Esteban; Alfaro-Paredes, Emigdio Antonio; Criollo-Illescas, Freddy; Tonon-Ordoñez, María D.; Heredia-Cabrera, Gina
- Abstract
The purpose of this study was to evaluate the efficiency of a large-scale Horizontal Tubular Flocculator (HTF) as an easy-to-implement technology for potable water provision compared to the efficiency of a traditional baffle flocculator. The HTF was built with a 4-inch diameter PVC pipe and coupled to a sedimentation and filtration process. Experimental tests were performed using lengths of 68.4 m and 97.6 m for the HTF. These lengths were combined with raw water flow rates of 0.25, 0.5, 0.75, 1, and 2 L/s and five turbidity ranges <10 NTU, 10–20 NTU, 21–50 NTU, 51–100 NTU, >100 NTU, giving a total of 100 tests for one year. Jar tests were performed to determine the optimal dose of aluminum sulfate used as a coagulant. Hydraulic characteristics such as time of retention (TR) and velocity gradient (G) were evaluated; likewise, plug flow, dead volume, and short-circuit ratios were determined by tracer tests using the Wolf–Resnick model. The average results determined a removal of 98.8% of turbidity and 99.93% of color. The TR varied between 4.62 and 36.97 min and G varied between 6.15 and 109.62 s−1. The results showed that HTF can be useful as a flocculation unit in a purification system.
- Subjects
DEVELOPING countries; WATER supply; DRINKING water; TURBIDITY; COAGULANTS; POLYVINYL chloride pipe; ALUMINUM sulfate; FLOCCULATION
- Publication
Water (20734441), 2023, Vol 15, Issue 5, p833
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w15050833