hello ,
we have 2 crore capacity of rain water harvesting tank.
Location : Bangalore, India
Problem : the water have higher turbidity more than 300 NTU
we tried some natural filtration methods like rice husk, foam fibres etc...
Solid particles seems to be colloidal in nature. Doesnt settle even after
several weeks. Now, we do alum dosing for filtration.
Need a practical & natural solution for permanent filtration (either prior to collection or after collection), without using chemicals.
a sr.engineer from water mangement