1. Waste water is the water in the waste water channel;
2. Waste water is the water effluent from the dam or hydraulic development plant;
3. Tail water is the water that flows out of the power plant during the production of electricity. This water lacks oxygen
4. Tail water; is generally used for underfloor heating. After cleaning, it flows through the pipes and returns to the boiler or water recovery system.
5. Waste water can also be produced water; during floor heating, which can be called geothermal waste water, also called floor heating waste water
6. Waste water is a kind of water which lacks oxygen, which is not conducive; to the survival of animals and plants and will cause pollution of the ecological environment.