Lackawanna River Basin Sewer Authority
COMPLETED: 2014
NRT Feasibility Study: evaluated alternatives to upgrade treatment process to satisfy DEP’s NRT limits, and possibly expand capacity. The low cost 3.0-MGD Design Flow alternative was to upgrade the existing eight-SBR process by extending the cycle time, automating DO control, and adding anoxic pre-react zones plus internal recycle pumps. The SBR process limits peak flow capacity to less than 9.0 MGD, which is a problem because the collection system includes combined sewers. The recommended alternative was converting the eight SBR’s to two BNR Reactors and adding secondary clarifiers, return and waste sludge pumping. NRT capacity would be 6.0-MGD, peak flow capacity would be 30 MGD. Other alternatives evaluated included 4-stage Bardenpho, Denitrifying filters, Integrated Fixed Film Activated Sludge and Membranes.
Headworks Improvements:
- CSO Diversion Chamber with mechanical CSO Screen
- Parshall Flume influent flow meter,
- Two Rotating Mesh Fine Screens with Screenings Washer/Compactors,
- Two low-head hydraulically-induced Vortex Grit Removal systems with grit pumps and grit classifiers,
- Screenings and Grit Conveyor,
- Open Pavilion covering headworks with auxiliary heat, and
- Utility Water Pump Station with three submersible pumps, valve vault and
pressure tank.
Headworks were designed to allow for future increase of Design and Peak Flow capacities.
Construction of headworks facilities including demolition of existing facilities, installation of new influent screening and grit removal equipment, belt conveyors, flow metering, utility water pumping and all related ancillary systems. Work including excavation, reinforced concrete, pavilion shelter, two masonry rooms, piping, asphalt paving and related electrical, mechanical, and site work.
