Ammonia Stripping and Integrated Fixed-Film Activated Sludge at the Keystone Sanitary Landfill Leachate Treatment Plant

K. Friederich Updegraff, P.E.
Gannett Fleming, Inc.
207 Senate Avenue
Camp Hill, PA 17011

Introduction

The Keystone Sanitary Landfill (KSL) is located at the Keystone Industrial Park in Dunmore and Throop Boroughs, Pennsylvania. The 618 acre landfill site was originally permitted for 5,000 tons of trash per day, and recently received a permit to develop more cells to extend the operation for another 25 years at 5,000 tons per day. Landfill leachate, an inevitable by-product of landfilling, is collected in two 5.5 million gallon holding basins that are mechanically aerated to keep solids in suspension and to prevent odors.

These basins serve as “equalization tanks” to smooth out precipitation-induced high flows from the landfill prior to discharge to the leachate treatment plant (LTP). Pretreated effluent is discharged to the Scranton Wastewater Treatment Plant owned and operated by the Scranton Sewer Authority, with the Authority administering the pretreatment program and enforcement of industrial dischargers permitted limits.

Keywords

leachate treatment, integrated fixed-film activated sludge, ammonia stripping, biological treatment, biofilm carriers

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