The cleaning of waste water is conducted in two stages. In the first stage conventional sedimentation, filtering, and chlorine treatment are given.
Through this step all materials present in water can be removed except dangerous pollutants like dissolved heavy metals.
In the second stage this heavy metal containing water is passed through a series of six connected marshes over 60 hectares of marshland.
In marshy area, plants, algae, fungi, and bacteria were seeded, they can neutralise, absorb and assimilate the pollutants as the water flows through the marshes, after this process water gets purified naturally.
