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Fluoride contamination of groundwater is a major, well-known health concern, that still does not have any highly effective or sustainable technologies to remedy it. The World Health Organization suggest suggests the Nalgonda method, but this techniques technique has several major flaws including a treatment efficiency that is limited to only 70 percent, and a large dose of aluminum sulfate, which causes sludge disposal problems. Instead, we use Polyaluminum Chloride (PACl) as a coagulant to which the fluoride can both adsorb to and coprecipitate with. Our objective for this semester is to adjust the physical filtration system to find an optimal configuration.
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The goals of the Fluoride Team is to design and create the optimal system for adsorbing and coprecipitating out fluoride from groundwater. |
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The Fall 2016 subteam will be fabricating and evaluating new bottom inserts to the filtration system, including one with a reverse jet. Once all tests have been conducted and the most efficient removal system has been determined, the team will evaluate whether or not clay is a necessary component of fluoride removal.
The Spring 2017 subteam will be determining if countercurrent floc blanket reactors should be used instead of a single floc blanket reactor for field testing. Both systems will be tested for a wide range of upflow velocities to optimize red dye #40 removal efficiency. Subsequently, a 0.1 L/s (approximately) reactor will be designed and fabricated for future testing.
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