FLUIRINE ADSORPTION RESIN

INOFT-R1 material

Benefits of INOFT-R1

• F-treatment is possible up to 3 ppm, which is lower than the limit of processing of F ion in the previous technology.
• The resin, which has been reduced in fluoridation efficiency, can be used continuously through the regeneration process that uses NaOH and HCl.
• The fluoride removed resin that does not include a complex filtration or precipitation process that is required in previous technology.
• It is possible to do adsorption treatment on F-ion from wastewater containing various anions.

regeneration of resin

Back Wash

• Back Wash is a process of sending water from the bottom to the top, in order to free the resin and wash away any foreign substance that precipitated.
• After reverse wash, the resin particles are set in order from small to large and sufficient space is required for the tank that contains the resin ( 40~50% of Tank’s total area).The appropriate time is around 20-30 minutes.

NaOH desorption regeneration

• Gradually pass the NaOH concentration of 0.1 to 0.3 N from top to bottom.
• Desorption of F-ion in resin is done to make NaF, which is used for regenerating the resin.
• Regeneration : (Desorption ) Ce - F + NaOH → Ce - OH + NaF

Washing with water

• In order to remove the remaining NaOH, wash it for one hour to completely eliminate the remaining NaOH

HCl Cleaning

• After the complete regeneration process, the pH level in the adsorption tower is up to 7~11 In order to set the pH level to 3.5, which will reactivate the resin, HCI cleaning will proceed.
• The concentration of HCl is 0.04N, washed for 60 to 100 minutes.