System and method for removal of fluoride from wastewater using single fluoride sensing electrode
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United States of America Patent
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Nov 11, 2003
Grant Date -
Aug 29, 2002
app pub date -
Sep 21, 2001
filing date -
Sep 26, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for removing fluoride from wastewater is provided. The system comprises a reaction tank for processing said wastewater by adding calcium salts, a filtration tank for removing the precipitated fluoride formed in the reaction tank, a single fluoride electrode disposed at the reaction tank for measuring a concentration of fluoride in the influent wastewater and providing an output signal, and a programmable controller for controlling addition of said calcium salts into said reaction tank. The programmable controller defines a setpoint of fluoride concentration in the reaction tank and automatically controls addition of calcium salts based on the setpoint and the output signal provided by the single fluoride electrode. A method of removing fluoride from wastewater is also provided.
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