|Total Nitrogen Monthly Average Concentration (mg/L)|
Plant Optimization Strategy for Nitrogen Removal Town of Crewe Wastewater Treatment Facility
Recent regulatory changes in Virginia will require the majority of wastewater treatment facilities to significantly reduce the discharge of nitrogen and phosphorus in the final effluent discharge. While most facilities will require an expansive upgrade to comply with the new requirements, the Town of Crewe operating staff have been evaluating the existing treatment facility for increased reductions of nitrogen and phosphorus through operational modifications. Although the facility relies upon chemical precipitation to remove phosphorus, plant staff have made adjustments to several treatment process parameters in an attempt to reduce total nitrogen levels from the existing plant.
Plant modifications were made in the second half of 2006. Does the 2007 data show a statistically significant improvement in the reduction of nitrogen in the final effluent discharge? Bear in mind this is a "before and after" type of problem, two samples. Data originally located via Swivel.