(2) Industrial water treatment: there are different standards for industrial water for different purposes. Activated carbon treatment is indispensable in the preparation of high purity water used in electronic industry, chemical industry and pharmaceutical industry. It is mainly used to remove organic matter, gelatin, pesticide residues, free chlorine and a small amount of carbon dioxide and oxygen gases. Due to the increase of industrial water consumption and water pollution, the demand for activated carbon is also increasing year by year.