Water treatment in rural areas to areas with water containing high levels of ammonium, the processor complex. Special operations management qffects ammonium concentration after treatment was high or low, if well run, the requirement is to ensure effective post-processing, if operated improperly, the process for handling the results achieved by design. Handling of Ammonium in groundwater in rural areas, need to have appropriate methods to ensure the required high processing efficiency, working stable, acceptable cost, in accordance with the quality parameters country's rural areas. Many recent studies in the treatment of ammonia in water by microbial oxidation method - submerged biological filter blower, with or without denitrification process has several advantages over both. This method does not pollute, does not need extra processing stages such as chlorination method, or refund the cost of the materials such as cation exchange.