Little Patuxent WWTP

  • Contract Type: Competitive Bid General Construction
  • Project description: Two back to back projects totaling over $20 million
  • Phase One included complete modifications to the sludge handling system which included:
    • Construction of new sludge holding tanks
    • Aluminum odor control cover
    • Blowers and associated piping
    • Sludge pump systems for sludge return
    • Sludge feed pumps to centrifuges
    • Two large centrifuges for drying the sludge
    • Sludge/lime treatment system
    • Air scrubber system with associated PVC ductwork and valves
    • Instrumentation, HVAC and electrical work
  • Phase Two included complete upgrade of the secondary aeration system including:
    • Removal of existing system
    • Installation of the biological nutrient removal system
    • Four ninety degree diameter secondary clarifiers
    • New Affluent pumping unit and associated discharge piping
    • Bypass pumping of 35 MGD of effluent to complete the instrumentation, and electrical work