Patent ID: 6645385
Filing Date: 2003-11-11
Classification: C02F,Y10S

Abstract:
A system for removing fluoride from a flouride bearing industrial wastewater, comprising:a reaction tank for processing said wastewater, said reaction tank including a first input for feeding said wastewater into said reaction tank, and a second input for adding calcium salts to said reaction tank to form precipitated fluoride; a filtration tank for removing said precipitated fluoride from said wastewater, said filtration tank including an output for discharging filtered wastewater; a single fluoride electrode disposed at said first input of said reaction tank, said single fluoride electrode measuring a concentration of fluoride in said wastewater fed into said reaction tank and providing an output signal; and a programmable controller for controlling addition of said calcium salts into said reaction tank responsive to said output signal provided by said single fluoride electrode so as to provide a treated output stream of desired quality.