Method for comprehensively utilizing acid mine wastewater

The invention provides a method for comprehensively utilizing acid mine wastewater, and relates to the technical field of environmental protection and water treatment. According to the method, an oxidizing agent is added in the iron removal pretreatment stage, ferrous ions in the iron-containing acid mine wastewater are oxidized into ferric iron, meanwhile, the pH value is adjusted to 3.4-3.6, heavy metal ions are subjected to chemical precipitation, iron ions are removed, valuable substances such as copper in the mine acid water are recycled, and obtained first press filter residues can serve as copper residues to be sold. Target heavy metals in neutralization overflow and second pressure filtrate in the neutralization process meet the first-level discharge standard of Integrated Wastewater Discharge Standard (GB 8978-1996) and the direct discharge limit requirements specified in the discharge standard of Industrial Pollutants for Copper, Cobalt and Nickel (GB 25467-2010), and are discharged after reaching t