Biological Dentrification of Polluted Groundwater. Completion Report No. 153.

摘要

Many groundwaters are contaminated with nitrate from fertilizers, domestic wastewater lechates and municipal waste treatment plant effluents which have entered groundwater aquifers. Nitrate is a mobile and very soluble ion, thus it has become a common groundwater pollutant. For example, a recent report of the Colorado Water/Sewer Needs Committee (Colorado Division of Local Governments) categorized the drinking water supplies of Baxter, Brighton, Chambers SUbdivision, Fort Lupton, Gilcrest, Hudson, Kim, LaSalle, Milner, Peyton, Platteville, and Southgate as demonstrated health hazards or producing immediate health effects due to high nitrate concentrations. Because the nitrate ion is toxic to infants, drinking water supplies that contain greater than the u.S. primary drinking water standard of 10 mg/L as nitrogen require treatment.