Wade Utility Plant Boiler MACT Compliance Design

Wade Utility Plant Boiler MACT Compliance Design

Location: West Lafayette, Ind.

Client: Purdue University

To identify air pollution control modifications to meet Boiler MACT and other regulatory requirements, Purdue University hired Burns & McDonnell to conduct a Boiler MACT study and provide detailed design of resulting recommendations for its Wade Utility Plant. The firm evaluated air pollution alternatives that allowed continued operation and assessed the ability of the existing plant auxiliary systems to support retrofits. Burns & McDonnell then provided detailed design for the recommended new fabric filter and dry scrubber, which were retrofitted to an existing boiler. 


  • Air pollution control systems design and layout
  • Fabric filter specification
  • Spray reactor vessel specification
  • Ductwork design and specifications
  • ID fan specifications
  • Schematic design, design development and construction documents
  • Bid evaluations
  • Bid-phase and construction-phase services

Upon completion of a Boiler MACT study by Burns & McDonnell in February 2004, Purdue University selected Burns & McDonnell to provide engineering and design services for new air pollution control systems that will put Purdue's Wade Utility Plant boilers in compliance with the new Boiler MACT standards.

As a result of the engineering study and the final rule language, installation of a pulse jet fabric filter (PJFF) as the primary control method on one or both of their coal-fired stoker boilers was determined to be the most viable option to comply with the Boiler MACT. Also included is the installation of a spray reactor upstream of the PJFF to reduce flue gas temperatures and increase mercury removal efficiency.

Currently, it is anticipated that emissions averaging as stated in the final MACT Rule will be allowed by the Indiana Department of Environmental Management (IDEM) as a method of compliance reporting. It is possible, however, that IDEM could enforce stricter compliance guidelines that would require Purdue to upgrade both boilers. Therefore, the project includes schematic design development to upgrade both boilers 1 and 2 with PJFFs. The final construction bid documents address the upgrade of a single boiler.