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Nitrifying Sidestream Treatment Project

Sacramento Regional County Sanitation District, California

West Yost provided Construction Management Services for this project, which involved the construction of a triple-train sequential batch reactor (SBR) process to pretreat highly concentrated wastewater returned to the main treatment plant by nitrifying the wastewater stream using high speed turbo air blowers. Each basin independently treated the wastewater by blowing air through fine bubble diffusers which nitrifies the wastewater making it easier for the main BNR process to reduce the ammonia content in the secondary effluent. To maintain the correct alkalinity, a stand-alone dry lime facility was constructed to create slurry that feeds into the SBRs via a computer-controlled process system.

Included with the project was:

  • A new electrical building and control room
  • Effluent pump station
  • Washdown water pump station
  • A stormwater pump station