The principles of technology of removing iron and manganese from groundwater, such as natural oxidation, contact oxidation and biological oxidation, are introduced. The working effects and some problems existed are discussed. It is elaborated that biological oxidation is a economical, efficient and promising method, and is promoted. Owing to the faults the methods of natural oxidation and contact oxidation exist. Since the research and application of project is lacking of more researches and practices, the biologi...
