Collection tank and Evaporation tank . In Collection tank it collects all waste water and sludges from the house through pipeline , Our Bio-Antizyme will clear all the sludges and make a form of re-cycle water ( Treated Water ) , those treated water will be transferred to Evaporation . 99% purified water will be evaporated under the ground . So that we can save our ground water . The tank is made with Bio – Cement , which give long life .