Aeration is a unit process in which air and water are brought into intimate contact while the thermodynamic equilibrium is decisive for the maximum possible extend of aeration, the rate of exchange and, hence, the degasification efficiency is mainly a function of the surface area of the exchanger.
  

Feroxer

Water is cleaned after Fe and Mn is removed through the Contact-Oxidation method with special filtering material called FEROX.   Ferox, a highly oxidizing mineral with excellent catalyzing capacity causes the oxidation of Iron and manganese contained in the water, which has been previously injected with potassium permanganate or O2. The mineral filters the precipitate while retaining the excess permanganate at the same time.