Springdale Power Station Closed Landfill

Acknowledgement: A Water’s Edge Hydrology project by Terry Rightnour, ARM’s Senior Hydrologist

The Springdale project initially served as a research and development facility for passive technologies and has continued as a full-scale treatment system for coal combustion residual landfill (CCK) leachate.  As a tailored collaboration between the Electric Power Research Institute and Allegheny Power Supply (now FirstEnergy), it is the source of many of the current passive design criteria and winner of the 1996 EPRI Innovator of the Year Award, 1996. PA Water Environment’s Industrial Excellence Award, and the 1997 Pennsylvania Governor’s Award for Environmental Excellence.  Leachate is collected and pumped to an oxidation/precipitation basin for iron removal prior to entering eight treatment cells.  The first four cells are aerobic wetlands to remove residual iron, followed by two manganese-oxidizing beds (MOBs), a vertical flow anaerobic organic cell for trace element removal, and an algal polishing pond.  Research features included greenhouse and outdoor test cells to evaluate selenium uptake by plants.  Maintenance involves only infrequent cleaning of iron sludge from the oxidation/precipitation basin and mowing of the cell perimeters.


Owner: FirstEnergy Corp.
Facility: Closed Springdale Power Station
Location: Allegheny County, PA
Year Constructed: 1995
Construction Cost: 1 $1,170,000
Annual O&M Cost: $10,000
10-yr Treatment Cost: 2 $0.024/gal
Design Flow: 100 GPM

 

Compliance Parameter Results:

pH 7.66 SU
Aluminum 0.030 mg/L
Arsenic 0.0048 mg/L
Iron 0.094 mg/L
Selenium 0.0015 mg/L
Manganese 0.050 mg/L
TSS 1.8 mg/L

1 Construction costs in 2012 dollar
2 Construction cost 10 x $10,000 annual O&M divided by 10 year design flow
3 Average effluent value for system life

Springdale CCR Landfill Constructed Wetland Leachate Treatment System