As economy and society develop much domestic waste water and industrial waste water are being produced every day. How to change them into clear water is what matters much for people’s life and environment.

Oxygen is very essential to medical care or home care. These applications take a big percentage of oxygen demand. Patients of every hospital takes much oxygen every day in different rooms, like wards, operation rooms, ICU etc. For these requirements oxygen generators are installed in more and more hospitals.

Oxygen is very useful in mining like in gold mine, manganese mine. Generally oxygen is as oxidizing agent or fuel to enhance the chemical reaction efficiency and speed.