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Ammonia Removal Improvements and Biosolids Dryer


St. Joseph, MO


$51 M

Delivery Method

  • Design-Bid-Build

Client Type


Project Type

  • Plant
  • Pump Station
54 MGD upgraded capacity
Largest sludge dryer equipment in the U.S.
Project affected 17 existing structures and 11 new structures on a 25-acre site

The majority of the City of St. Joseph and its surrounding area is served by a single wastewater treatment facility, the Water Protection Facility (WPF), a secondary treatment facility currently permitted for an average day design flow of 27 MGD. The WPF is fed domestic, commercial, and industrial wastewater and also receives and treats 200,000 gallons of hauled waste from septic tanks, grease traps, and industrial storage tanks. This project included reconfiguring several processes to achieve higher ammonia removal to meet more stringent DNR permit requirements. Construction of this project was split into 12 work packages and included a grit/screening facility on driven H-piles, cast-in-place concrete dissolved air feed (DAF) vault wet well, 4,000 LF of yard piping, 155-foot diameter cast-in-place industrial aeration basin, final clarifier and splitter box, RAS pump stations, aeration basins, operations building electrical and SCADA modifications, belt filter press building that received a new Alum feed system and Andritz wet cake equipment, and a new biosolids dryer and conveyance facility with vacuum conveyance system in two new metal buildings.