Project Number:

3195

NEFCO Air Permitting

SERVICE:

Air Permitting Support

DESCRIPTION:

The City of Cumberland, Maryland Department of Public Works was proposing to add a 14 dry-ton-per-day (DTPD) biosolids heat drying facility at their WWTP in Cumberland, Maryland. The proposed facility will be operated and maintained by New England Fertilizer Company (NEFCO). The proposed facility will process all of the City's sludge into a dry solids product (pellets). The proposed heat dryer burner will be capable of handling digester gas, natural gas and No. 2 fuel oil. The proposed facility will have two new air emissions points: a dryer system exhaust and the building ventilation exhaust. The heat dryer exhaust will be treated in a RTO prior to being discharged through a dedicated stack. The ventilation air will be treated in a packed bed wet scrubber to reduce odors.

Tech Environmental was retained by Tighe & Bond, Inc. to prepare a Maryland Department of the Environment (MDE) permit-to-construct application under a very tight deadline. As part of this application, Tech developed emissions calculations and performed a toxics air pollutant screening modeling evaluation. In addition, Tech prepared an Best Available Control Technology analysis for air toxics (T-BACT) demonstrating that a 3-stage impingement tray scrubber and condenser with a regenerative thermal oxidizer is T-BACT. Tech prepared a very detail-oriented application that received minimal comments and questions from the MDE, which helped to expedite the permit review process.

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Key Points

  • A proposed biosolids heat drying facility in Cumberland, Maryland needed to satisfy MDE permitting requirements in a short timeframe.
  • Tech prepared a very detail-oriented application that helped to expedite the permit review process.