Field Demonstration of Biological Dentrification of Polluted Groundwater and Pilot Scale Field Testing and Biological Dentrification with Widely Varied Hydraulic Loading Rates

摘要

Based on the previous research, a field demonstration of the biological denitrification process followed by slow sand filtration was initiated. It was the objective of the project to demonstrate the operation of the plant under conditions which are typical of a small community water supply operation, i.e., significant periods of unattended operation, natural variations of water temperatures and influent nitrate concentrations, and seasonal variations in water demand producing variations in hydraulic loading to the denitrification tower. After slow sand filtration the performance of the plant was expected to produce a high-quality water meeting the Safe Drinking Water Act standards for nitrate, turbidity, and coliform bacterial concentrations.