Many places have high iron contamination in water. This problem can be easily solved using Terafil filter. This is a filter made out of sand, clay and sawdust. It has a unique property that it does not allow iron in water to pass through it.
Terafil filter can be connected to any bucket by making a hole at the bottom of the bucket.
One Terafil filter gives 20-25 ltrs of water per day. Incase more water is needed additional Terafil filters can be put in a larger bucket.
Using an iron testing kit the water quality can be checked. High iron content water shows deep red colour on testing. No iron in water is indicated by transparent colour. Allowed iron in water is less than 0.3 ppm.
Once in a week the filter top surface can be cleaned. Iron in water is deposited on the top surface of the filter and is removed by brushing the filter and cleaning with water.
Each filter will last for over 2 years.
Fluoride removal in water using Terafil filter and Activated Alumina
Fluoride in water should not be more than 1.5 ppm. High fluoride damages the bones and causes the teeth to go black. Many people have bent backs and severe joint pains in areas with high fluoride.
To remove fluoride from water connect a Terafil filter to the bucket. Then put 3 kg of Activated Alumina in the bucket. Alumina has the property of adsorbing the fluoride from water. As the water passes slowly through alumina and then the terafil filter, the fluoride in water is adsorbed by alumina. End result is fluoride free water.
After 3 to 4 months the Alumina will get saturated with fluoride and it has to be cleaned. To remove fluoride adsorbed on Alumina, take 1/2 kg of crushed Alum in a bucket and add clean water to it. Mix the alum in water. Then pour the Alumina in the bucket having Alum water. Let the Alumina be soaked in the bucket for 24 hours. After that period throw the Alum water. Wash the Alumina beads with clean water, 2 to 3 times. The alumina is now fresh, as all the fluoride stuck to it has been removed. The Alumina can be put back in the bucket with Terafil and it is once again ready to give clean water for next 3 months.
It is better that each household has a fluoride testing kit so that once a month they can check the output quality of water.
