The Experimental Study on Biological Treatments of Acid Coal Mine Drainage in the Natural Coal Mine Drainage Pit

The experiments conducted in the unsealed reactor.The environment condition of treating acid coal mine drainage by sulfate-reducing bacteria and the removal rate of sulfate and heavy metals were researched under different depth,bacteria amount,pH,temperature and initial SO42-concentration conditions,respectively.The aim of the experiment was to demonstrate the feasibility of the biological technique for treating acid coal mine drainage by adding appropriate microorganism amount and carbon source in the natural coal mine drainage pit.The subject tried to discover the practical method and technology that can reduce the costs of treating acid mine drainage,and provides the basis and parameters for further study.