Fluoride Reduction in a Groundwater System

Taxonomy

• Treatment Methods
• Water Treatment Solutions
• Groundwater
• Groundwater Assessment
• Groundwater Pollution

6 Answers

1. solar

   Distillation will remove fluoride without the requirement for energy, filter replacements and/or chemicals

2. We have a treatment plant that uses activated alumina in an absorption column. The activated alumina is regenerated using sulphuric acid and caustic soda. The challenges with the process are the hazards presented by the chemicals (which can be managed, though at a cost) and the ability to dispose of the liquid fluoride waste stream...

3. We have a system which is passive absorption using calcium based absorbent which we have developed. Just soak the absorbent in water for 24 hours and it will suck all the fluoride then filter the remaining contaminants through our wasan water purifiers

4. Actually there is no "good" technical solution as F- is very reactive. There fore you have to remove some harmless anions before accessing to F-.

   You could consider :

   • Alumina Al2O3 filtration : drawbacks: media lifetime, limited efficiency, chemicals (acid+caustic soda) consumption
   • , Filtration on Tri-calcic phosphate: drawbacks: single use media, very limited efficiency. (other media can also be assessed for a pilot plant like CAG, Serpentine etc.) 
   • Ion exchange (resins) : drawbacks: resins lifetime, chemicals consumption, water authority agreement for resins
   • RO-electrodialysis : drawbacks : electrical consumption, brine

    Good luck

   1 Comment

   1. These work. In some places they used bone char for small quantities.

5. Fluoride adsorption media filter can be installed. We are pune India based company name Aquacare Engineers doing Projects on EPC contact us on 919860663150

6. Controlled Alum injection or Reverse Osmosis.