As mDirect Drive blower system and noise enclosureany cities around the country face new state and federal standards that demand higher regulations for their municipal facilities, the City of Kirksville, Missouri Wastewater Treatment Plant prepares to undergo new improvements to ensure compliance with the tougher standards.

The plant improvements have three major phases including headwork’s and flow control, biological treatments, and solids handling with a total cost for the project around $18 million and began in the spring of 2015.

The engineer of record is HDR Engineering. The general contractor awarded the project is River City Construction. Universal Blower Pac’s representative is Ressler & AssociatesKirksville WWTP loading blower systemUniversal Blower Pac is providing five tri-lobe blower systems to service the post aeration basins.


Each blower provides up to 2560 SCFM at 10.5 PSIG on a VFD. The tri-lobe blowers are direct coupled with 250HP motors in ATTENU-PAC enclosures.


  • Direct drive design provides up to 5% energy savings versus v-belt driven blowers at the design point
  • Direct drive design eliminates belt maintenance and replacement
  • Up to 60% energy savings due to VFD control versus a constant speed system
  • Up to 25 dba noise reduction with the ATTENU-PAC full enclosure design