Product/ Process: Electrochemical Defluoridation

Application / Use: Removal of fluoride from drinking water

Salient features of technology / process

Fluoride is known to be reversibly absorbed by aluminium hydroxide. The elctro-chemical process involves the generation of aluminium hydroxide by the anodic dissolution of aluminium / its alloys. The process operates on DC at a voltage of 2.0 - 2.5 V. With this process, 5-10 ppm fluoride, usually encountered in the ground waters of many of the regions in India, can be reduced to 1.0 ppm, being the acceptable concentration of fluoride in drinking water. The process operates at an energy consumption of 0.3 - 0.5 KWH of electricity per 1000 litres.
Raw materials

i) Electricity : @ 0.3 - 0.5 KWH / 1000 litres
ii) Aluminium Alloy anode: @ 65-85 g/1000 litres

Machinery / Equipment

Rectifier, Electrolytic cell, Pumps, Storage tanks, Sand filter unit etc.
Technology demonstration cum training facilities
Available at Central Electrochemical Research Institute (CECRI), Karaikudi

Product acceptability

The defluoridated water has been analysed at CECRI and found to be acceptable

For More Information, Contact:

Central Electrochemical Research Institute
Karaikudi 630006,
Tamil Nadu