The general methods of mine water treatment in China

Mine water is a by-product of the process of coal mining, which is a huge amount (about 7.0 × 1010 m3 in 2016 only in China). For coal mine water including different ingredients, the different water treatment methods have been used. In China, utilization of the treatment methods is summarized, which presents the application situation, technical characteristics, economy, project place and etc. The development trend of mine water treatment technology is discussed, and the main uses of the treated mine water are given. On the whole, electrodialysis is easy to scale, but it requires high pretreatment of water in the engineering cases. In recent years, for the treatment of high salinity mine water in China, it has been gradually replaced by reverse osmosis. With environmental protection requirements and shortage of water resources, integration and optimization of technology will be an important trend in the development of coal mine water treatment technology.